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  • gtoal commented on jessyratfink's instructable DIY Gold Slime2 weeks ago
    DIY Gold Slime

    Did you search for the name of the product and the tag "MSDS" - they're obliged to post a safety information sheet with full details. I've reverse engineered and/or compared many products this way!

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  • gtoal commented on Paige Russell's instructable How to Store 3D Printing Filament3 weeks ago
    How to Store 3D Printing Filament

    Would a dehydrator (eg for fruit, beef jerky etc) work for rejuvenating printer supplies that had been left out for a year?

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  • gtoal commented on headamage's instructable Raspberry Pi Python EEPROM Programmer1 month ago
    Raspberry Pi Python EEPROM Programmer

    Is it possible to use ID_SC or ID_SD to get an extra pin for A15, in order to write 512 bit EEPROMS (64K x 8)? Which EEPROM would you recommend for a 64K x 8 project? Looks like you've found one for your project that doesn't require 12V to program or clear?

    Answering part of my own question - it looks like the pins can be used on Pi B's prior to the Pi3.

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  • gtoal commented on gtoal's instructable Retro Pi Cam1 month ago
    Retro Pi Cam

    Current state of the project is that I've been buying more cameras on eBay when they show up under $20, and am still waiting for Pi Zeroes to become available in quantity at a fair price, with the plan to do a bulk build of at least ten cameras at once. By the time I do that, I'll have re-worked the software into something worth sharing with others. I've bought a lux sensor chip for testing with but haven't used it with the camera yet (mainly because I dismantled the camera and haven't rebuilt it with the Pi Zero yet - the pi zero camera connector broke) and I've got a couple of very small displays that I'm trying to see if I can fit inside the viewfinder.

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  • gtoal commented on LukeK1990's instructable Hands Free Google Assistant for Raspberry Pi3 months ago
    Hands Free Google Assistant for Raspberry Pi

    Doesn't snips have to be trained per speaker, and since they have a commercial tier I infer it is not open source..? The thing about using Google is that it's a major major improvement in recognition quality over what has gone before and makes voice projects finally practicable, which has never been the case with systems with higher error rates.

    I'd already brought one of these up before seeing your Instructable - the instructions at Google's own site are quite clear: https://developers.google.com/assistant/sdk/develo... - that's what I used and it all installed with no problems - even the "OK Google" recognition came pre-configured and worked first time. The only extra thing I had to do was have it start on boot, which is a 1-liner in /etc/rc.local.By the way you'll find that Ps3 Eye cameras are great for this - they have a 4-mic array that's very sensitive (as good as my Gen1 Alexa) and you just treat it like an ordinary mic - all the clever noise reduction stuff is done transparently in the hardware, plus you get a pi-compatible USB camera thrown in for free that you can use separately with the 'motion' package. ...

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    I'd already brought one of these up before seeing your Instructable - the instructions at Google's own site are quite clear: https://developers.google.com/assistant/sdk/develo... - that's what I used and it all installed with no problems - even the "OK Google" recognition came pre-configured and worked first time. The only extra thing I had to do was have it start on boot, which is a 1-liner in /etc/rc.local.By the way you'll find that Ps3 Eye cameras are great for this - they have a 4-mic array that's very sensitive (as good as my Gen1 Alexa) and you just treat it like an ordinary mic - all the clever noise reduction stuff is done transparently in the hardware, plus you get a pi-compatible USB camera thrown in for free that you can use separately with the 'motion' package. They cost between $2.50 and $4.50 used on eBay and are available aplenty at the moment.

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  • gtoal commented on MatthewH's instructable Remote Control Your Raspberry Pi5 months ago
    Remote Control Your Raspberry Pi

    Yes! That is indeed the answer I was looking for - thanks!

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  • Control Bluetooth LE Devices From a Raspberry Pi

    I don't have any BLE modules yet. I've driven regular relays from pins on a pi successfully.

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  • gtoal commented on MatthewH's instructable Remote Control Your Raspberry Pi6 months ago
    Remote Control Your Raspberry Pi

    Since my rpi is headless it doesn't automatically detect an HDMI display and so it starts with a small desktop display which x11vnc sees. I thought that addinghdmi_force_hotplug=1hdmi_drive=2to /boot/config.txt would force an hdmi mode on reboot. However it didn't work. x11vnc started up with the same small display. Any ideas?(This is a different problem and solution from using a vnc server such as tightvnc which creates a new virtual framebuffer, where you can force the screen size using the -geometry option.)

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  • gtoal commented on chalei's instructable Raspberry Pi Online SSH (easy Way)7 months ago
    Raspberry Pi Online SSH (easy Way)

    It looks like the ngrok service is running a reverse tunnel for you, but since it is a service that isn't under your control, you're basically trusting them that they won't sniff or MITM your traffic. A better solution is to do the same thing explicitly yourself, by having a machine of your own outside your firewall and reverse-tunnel to it yourself from the machine you need to access which is inside a firewall somewhere. Setting up the reverse tunnel is a 1-liner, something like this, issued on the firewalled machine during startup:export AUTOSSH_GATETIME=0autossh -f -N -p allowed_port -R 10001:localhost:22 myusername@mypublichost -oLogLevel=error -oUserKnownHostsFile=/dev/null -oStrictHostKeyChecking=no('allowed_port' is any port that your host can use to listen for ssh connections...

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    It looks like the ngrok service is running a reverse tunnel for you, but since it is a service that isn't under your control, you're basically trusting them that they won't sniff or MITM your traffic. A better solution is to do the same thing explicitly yourself, by having a machine of your own outside your firewall and reverse-tunnel to it yourself from the machine you need to access which is inside a firewall somewhere. Setting up the reverse tunnel is a 1-liner, something like this, issued on the firewalled machine during startup:export AUTOSSH_GATETIME=0autossh -f -N -p allowed_port -R 10001:localhost:22 myusername@mypublichost -oLogLevel=error -oUserKnownHostsFile=/dev/null -oStrictHostKeyChecking=no('allowed_port' is any port that your host can use to listen for ssh connections on; and you can use any number you prefer instead of 10001)then when you want to connect to the firewalled machine, from your relay host just do: ssh -p 10001 myusername@localhost

    Doesn't this just do a terminal session to a machine at bartlweb.net which then ssh's out to your target? So in principle, that machine could log all your plaintext traffic, passwords etc. You're placing a lot of faith in a complete stranger.

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  • gtoal commented on TechWizYouTube's instructable Raspberry Pi Emulator for Windows 108 months ago
    Raspberry Pi Emulator for Windows 10

    At the end of step 5, on starting the emulator, I getKernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)CPU: 0 PID: 1 Comm: swapper Not tainted 4.4.34+ #3Hardware name: ARM-Versatile PBfollowed by a backtrace.The only difference from your instructions which I otherwise followed to the letter was that I installed the latest jessie lite ( 2017-03-02-raspbian-jessie-lite.img) rather than the full pixel desktop.

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  • gtoal commented on dustin_little's instructable Build a Wooden Mug From Scraps! 8 months ago
    Build a Wooden Mug From Scraps!

    No, grog is watered down rum that was issued to sailors - watered down so that it would not keep; that way they had to drink it when it was issued by the purser, so they wouldn't stockpile it and get really drunk at some other time, eg during a battle when they needed to have a clear head. The author probably means "a grog mug".

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  • Control Bluetooth LE Devices From a Raspberry Pi

    Has anyone managed to talk to those new BLE relay modules available recently? The vendors only supply an android or apple app - no protocol info to drive from arduino or raspberry pi. (This style: http://www.icstation.com/2bit-relay-module-bluetooth-precise-android-apple-smart-home-switch-p-8463.html - there is another style ( http://www.tinyosshop.com/index.php?route=product/product&product_id=369 ) that uses *-bee modules and has a published serial protocol but those modules are much more expensive)

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  • gtoal's instructable Easiest RGB LED Strip With Raspberry Pi!'s weekly stats: 9 months ago
    • Easiest RGB LED Strip With Raspberry Pi!
      364 views
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      1 comments
  • gtoal commented on gtoal's instructable Easiest RGB LED Strip With Raspberry Pi!9 months ago
    Easiest RGB LED Strip With Raspberry Pi!

    I hear that Broadcom pin numbers 12/13/18/19 are capable of hardware PWM support so may be a better choice than the ones above. OTOH I had previously understood that only pin 18 was supported by hardware PWM so I don't know if this applies to all models.

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  • Calculating Sunset and Sunrise for a Microcontroller

    Why use an approximation when an accurate calculation is available?http://stjarnhimlen.se/comp/sunriset.cThis may be helpful in getting an approximate lat/lon for use with the above: curl -s "https://freegeoip.net/csv/`curl -s v4.ident.me`"|tr ',' '\n'|tail -3|head -2|tr '\n' ' '

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  • R-PiAlerts: Build a WiFi Based Security System With Raspberry Pis

    A PIR sensor would be a lot cheaper and more effective than a sense hat.

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  • gtoal commented on ehsmaes's instructable LED Strip Controller W/ LED Amp + Arduino9 months ago
    LED Strip Controller W/ LED Amp + Arduino

    to answer my own question - this amplifier does *not* connect the input +V to 12v so it is safe to drive the amp directly from the +5V and GPIO pins (4,5,6) of the Raspberry Pi! I'll be posting an instructable shortly after I've found the answer to a driver issue. ( https://www.raspberrypi.org/forums/viewtopic.php?f=37&t=176740&p=1126989 )

    perhaps a naive question, but... these LED strips have +12V and RGB signal pins. They don't have a GND. How can there be a circuit? There's nowhere for the electrons to go! Also I would like to try this myself but have a different style of amp (looks like this: https://www.flexfireleds.com/rgb-signal-amplifier/ ) - putting a meter on it shows that it does *not* feed back 12V to the input side. Will that affect how to hook it up?

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  • gtoal followed Divejackdive9 months ago
      • RPI interchangeable lens camera from old SLR camera lens
  • gtoal commented on gtoal's instructable Retro Pi Cam9 months ago
    Retro Pi Cam

    Funny story about that... I tried to unscrew a picam lens to do close-focus for another project, but it was one of the chinese clone picams and turns out the lens doesn't unscrew - after a huge amount of forcing I actually broke the lens off by accident. Fortunately I kept the broken camera, which means I already have one that I can try with your suggestion! (An excellent example of why never to throw damaged parts away if you don't have to)

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  • gtoal commented on andymenon's instructable Prelude to Automation - Hacking a Remote10 months ago
    Prelude to Automation - Hacking a Remote

    I disagree about needing a 9V battery to drive the relays - I drive 10 relays (an 8-relay board and a 2-relay board) from the GPIO pins of a Raspberry Pi. Initially I did think I was having problems with power but it turned out I had been sent a relay board with a faulty relay on it. After swapping boards it has worked every time - https://www.instructables.com/id/Control-Any-Remote-From-a-Raspberry-Pi-and-Amazon-/

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  • Control any remote from a Raspberry Pi (and Amazon Echo!)

    could you execute these commands please, so I can work out what the problem might be:cd /usr/local/src/echo/echo-masterfgrep act\( *

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  • gtoal commented on Toglefritz's instructable Build a Raspberry Pi-Powered Amazon Echo12 months ago
    Build a Raspberry Pi-Powered Amazon Echo

    just FYI the same model crimping tool a little cheaper at Amazon: https://www.amazon.com/Wovier-Compression-Ratcheting-0-1-1-0mm2-Wire-electrode/dp/B01CE4FAMW/

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  • Control any remote from a Raspberry Pi (and Amazon Echo!)

    That's great! I'm looking forward to the day when Pi Zeros or equivalent are something you keep several of in a drawer for use in projects like this and are not premium items that are so hard to get hold of! (Really, having to get a single unit airmailed from the UK is just ridiculous). Using the Zero here has really made your version of this project much neater. Thanks for posting.

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  • gtoal commented on MakrToolbox's instructable Wireless Outlet Controller1 year ago
    Wireless Outlet Controller

    I did something very similar except with a Raspberry Pi... https://www.instructables.com/id/Control-Any-Remote-From-a-Raspberry-Pi-and-Amazon-/

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  • gtoal commented on Astuces de Trente Secondes-'s instructable DIY INFRARED CAMERA1 year ago
    DIY INFRARED CAMERA

    Agreed, most of the IR is filtered out - you'll be able to see an IR LED directly (eg a remote control) and maybe some things that are within a couple of feet of your IR light source but the sort of thing you see with a night vision security camera where people are illuminated maybe 30 ft away is unlikely with most cell phone cameras, even though that illuminator you're using reaches distances like that. Unfortunately the filters can be extremely hard to remove without damaging your equipment - you might consider experimenting with a Pi Zero and a Pi NoIR camera...

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  • Sponge + Ferric Chloride Method -- Etch PCBs in One Minute!

    Do you know if anyone has tried PCB etching with Armour Etch? (The stuff that crafters use to etch glass) I googled for it and didn't find any, but maybe someone more switched in to the DIY PCB scene might have seen something on a BBS somewhere?

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  • $2 Battery Charger/Power Bank for 18650 Battery

    Can you use power while charging? Ie use the solar panel to charge an outdoor project while the project is powered up 24x7?

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  • Control any remote from a Raspberry Pi (and Amazon Echo!)

    Depends where you want to put the effort in. *Building* what you suggest is trivial, I could do it in 10 minutes and in fact I do have the hardware. (transmitters and receivers for both frequencies, plus an SDR for debugging). However programming a system like that is quite another matter. I got the software for my system up in an afternoon. If I had to reverse engineer the remote control signals and duplicate them, I would imagine that would take considerably longer.In point of fact, I recently bought a "Hook" system which is a professional implementation that does what you suggest. Originally I built this the relay way because it was a lot easier than learning how to generate the correct signals for the wireless; now I prefer that it uses the original remote, because it ...

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    Depends where you want to put the effort in. *Building* what you suggest is trivial, I could do it in 10 minutes and in fact I do have the hardware. (transmitters and receivers for both frequencies, plus an SDR for debugging). However programming a system like that is quite another matter. I got the software for my system up in an afternoon. If I had to reverse engineer the remote control signals and duplicate them, I would imagine that would take considerably longer.In point of fact, I recently bought a "Hook" system which is a professional implementation that does what you suggest. Originally I built this the relay way because it was a lot easier than learning how to generate the correct signals for the wireless; now I prefer that it uses the original remote, because it turns out that even the professionally implemented Hook is far less reliable than the original remote - there appears to be a problem duplicating the control signals accurately. When I turn on half a dozen lights with the Hook, it's very seldom that all of them turn on, whereas I've never had a failure with my own implementation.

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  • Control any remote from a Raspberry Pi (and Amazon Echo!)

    Followup on the Hook after a couple of weeks of using it: Pro: you can control a _lot_ more devices with it; Con: it is nowhere near as reliable as the original remote at turning the devices off and on. The number of failed attempts is so high that I've just about given up on it and plan to revert to using my own design soon, possibly with mrlewis93's mod of using optocouplers and a Pi Zero to get the size down.

    I appreciate you letting me know - it makes the effort writing the project up worthwhile when someone actually builds your project! Any chance you could upload a photo of yours (with the "I made one" option) - I didn't know optocouplers were smaller - had assumed they were the same package as relays. I'ld like to see your compact version. I found an old 1960's mechanical switch controller (looks like an alarm clock) that I've gutted and am working on squeezing mine into!

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  • gtoal followed mrlewis931 year ago
  • gtoal's instructable Party Pooper!'s weekly stats: 1 year ago
    • Party Pooper!
      1,275 views
      18 favorites
      2 comments
  • Reverse engineering Air Conditioner IR Remote control protocol

    I was hoping that it implied the information was out there, but you're probably right - it'll be proprietary :-( I wonder if they have access to the info from the manufacturers or if they reverse engineered a bunch of remotes like you did?

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  • Reverse engineering Air Conditioner IR Remote control protocol

    This may be new since you wrote your article: http://removeandreplace.com/2016/06/17/universal-air-conditioner-remote-control-codes/

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  • Clean Eating Cranberry Granola

    Well yes, it's my supper rather than breakfast!

    I bet you're not going to approve of this, but I just love granola when it's served in a mixture that's 2/3rds plain lowfat yoghurt and 1/3rd sugar-free Cool Whip :-) Tasty!

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  • gtoal commented on gramos85's instructable Girl With a Pearl Earring Cake1 year ago
    Girl With a Pearl Earring Cake

    I would recommend projecting the image on to the cake for the painting step.

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  • gtoal commented on schouw's instructable Norwegian Brown Cheese1 year ago
    Norwegian Brown Cheese

    Wow - I had no idea that there was no sugar added to Gjetost - I love this kind of cheese but my wife won't let me buy it because it's so sweet (she does a good job of keeping my diabetes in check!) - but we'd always assumed the cheese was made with added sugar. Never realised it was just lactose from boiled-down milk. (Which I think is not so dangerous to diabetics, at least that's the excuse I use when I buy Indian sweets like Kaju Katli which don't have sucrose either :-) )

    PS At least in South Texas, this is sold in the local supermarkets such as HEB.This brand specifically: https://www.amazon.com/Ski-Queen-Gjetost-2-pack/dp/B00E8HZDCQ/ (cheaper in the stores than that Amazon seller)

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  • gtoal commented on rsmaudsley's instructable 1 Ingredient Caramelish Topping1 year ago
    1 Ingredient Caramelish Topping

    I have a vague recollection of making something that was just like the caramel in a mars bar, and although I forget how exactly I did it, I think it may have been as simple as a can of sweetened condensed milk in a microwave. (Not in the actual can of course!) Have you experimented with microwaving it instead of boiling it at all?

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  • gtoal commented on jessyratfink's instructable easiest ever fudge recipe1 year ago
    easiest ever fudge recipe

    My wife has a "never fail" fudge recipe that is based on jars of Marshmallow. I may record her making it for Christmas so we can see which really is the easiest ever :-)

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  • gtoal commented on Dainis_Dz's instructable Chocolate extruder for Ultimaker1 year ago
    Chocolate extruder for Ultimaker

    maybe make a bed of peltier chips for surface cooling without a breeze?

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  • gtoal entered Party Pooper! in the Halloween Food Contest 2016 contest 1 year ago
  • gtoal posted an instructable Party Pooper!1 year ago
  • gtoal followed MisterM1 year ago
      • Pi Zero Talking Radio
      • The Raspberry Pi Batinator
      • RabbitPi - the Alexa Enabled, IFTTT Connected, Ear-Wiggling IoT Assistant
  • gtoal followed haddad1 and l3mming1 year ago
  • Control any remote from a Raspberry Pi (and Amazon Echo!)

    Thanks, I'll look into ha-bridge. ( http://bwssystems.com/ , https://github.com/bwssytems/ha-bridge ) Also I found a device called 'Hook' yesterday (which I've already ordered!) that looks better than what I implemented at the same cost ($50) - they clone the RF signals rather than using relays: http://www.hooksmarthome.com/

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  • gtoal commented on alannarosewhitney's instructable Traditional Jack-O-Lantern1 year ago
    Traditional Jack-O-Lantern

    with haggis and tatties!

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  • Control any remote from a Raspberry Pi (and Amazon Echo!)

    In case anyone expands a system like this, that was the wrong board above - this is what I should have linked to: http://www.ebay.com/itm/262136732889

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  • HOW TO USE ANDROID DEVICE AS RASPBERRY PI MONITOR

    With a little effort you can have the pi broadcast its IP address (either DNS or with Bonjour) or you can configure it to always be given the same address by your router. Scanning for the IP each time is a bit awkward.

    Using an android is a very cost-effective way of getting a reasonable sized screen on cheap. The downside is that VNC isn't fast enough for real-time video or even most reasonably fast video games. But if you're just using it as a semi-static display (eg for weather, or as a soft panel for an in-home lights controller etc) then it's a good solution. I've seen cheap Chinese androids down at the $30 mark, and even a relatively good machine like a Kindle Fire is sometimes on sale cheaper than the official Pi LCD screen.

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  • $3 Solar Powered 9 Volt Battery Charger – Perfect First Time Project!

    Actually '9V' rechargables are usually really 7.4V Lipos, and when you take into account the .6V drop from a typical buck converter/regulator, you're in the right ballpark for running a 5V system such as a Raspberry Pi.

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  • Control any remote from a Raspberry Pi (and Amazon Echo!)

    I upgraded my system a couple of weeks ago to support all 5 devices - the version of fauxmo.py at https://github.com/makermusings/fauxmo works fine with multiple devices.

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  • Home Automation with Amazon Echo voice control

    I'm currently working on using this to add commands like "alexa, turn on bbc america". It's complex. First I send a 'Wake On Lan' packet to my LG Bluray player (since my TV doesn't have WOL itself, and it doesn't wake up for my DirectTV box, but it will wake up for the HDMI CEC signal from the bluray :-( ). Then I ask the LG TV to change input to the DirectTV box, then I ask the DirectTV box to select the appropriate channel. All of these are doable over local network IP, but getting them all to play together is hard work! I'm not quite there yet. (Blueray and DirectTV are working, but I'm having problems controlling the 2011 model of LG TV) Icing on the cake, I'm getting the festival speech synth to work with a bluetooth speaker so I can get the Echo to report what is pla...

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    I'm currently working on using this to add commands like "alexa, turn on bbc america". It's complex. First I send a 'Wake On Lan' packet to my LG Bluray player (since my TV doesn't have WOL itself, and it doesn't wake up for my DirectTV box, but it will wake up for the HDMI CEC signal from the bluray :-( ). Then I ask the LG TV to change input to the DirectTV box, then I ask the DirectTV box to select the appropriate channel. All of these are doable over local network IP, but getting them all to play together is hard work! I'm not quite there yet. (Blueray and DirectTV are working, but I'm having problems controlling the 2011 model of LG TV) Icing on the cake, I'm getting the festival speech synth to work with a bluetooth speaker so I can get the Echo to report what is playing...

    You have to have some way of controlling your device from a computer. For instance, a shell script that access GPIO pins, or sends a command to an IP-enabled device using some device-specific protocol. Then you modify the python code that this project refers to, so that it invokes that shell script on the web server where it is running. (See my remote control project below for an actual example)

    fyi there's a newer version of fauxmo.py at https://raw.githubusercontent.com/makermusings/fauxmo/master/fauxmo.py which supports multiple devices. I've tried it - it works. It fetches a web cgi to cause the action to be initiated. You have to supply that cgi script yourself.

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  • gtoal commented on gtoal's instructable Retro Pi Cam1 year ago
    Retro Pi Cam

    If you can wait a bit, I've recently bought a Pi Zero with a camera cable, and intend to re-do the retrocam using that instead - it should be much easier to fit in the camera body. I have a second camera ready, and I'll photograph the process more carefully next time. The photos were all right but getting the exposure right automatically was tricky - if it was well exposed indoors, it would be washed-out in bright sunshine. I now have a lux meter sensor that I want to add in the next one to use as a built-in light-meter. It would be possible to use the camera as a light meter but there would be a noticable delay between pressing the button and the picture being taken which I didn't want.

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  • gtoal commented on notsosharp's instructable Solar Heated Large Scale Dehydrator1 year ago
    Solar Heated Large Scale Dehydrator

    Don't insects get in through the holes in the top? I live in a hot climate (south texas) and would be inclined to do this rather than use an electric dehydrator but I guarantee that drosophila, flies, and ants would be all over it if there was the slightest entrance for them to use.

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  • gtoal commented on danionescu's instructable Desktop Display Auto Rotate1 year ago
    Desktop Display Auto Rotate

    I'm retired now, but when I was working we had many displays that were rotatable, and they all sensed when the display was rotated and the OS (Windows in our case) adjusted and rotated the display automatically to match, I think you've assumed that this doesn't happen because you haven't seen a display that behaves like this? It *is* fully automatic. Unfortunately since I no longer have access to that hardware I can't look at the specific models to give you a reference however a quick Google search finds many: http://www.pcworld.com/article/2042888/review-three-widescreen-hd-monitors-that-pivot-from-portrait-to-landscape.html Both VGA and HDMI connectors support protocols nowadays to announce the orientation to the OS.

    Rrotatable displays signal to the OS when they are rotated, and the screen driver adjusts automatically. Did you do this because you don't have the right drivers, or because the monitor you're using doesn't have rotation support? Instead of adding an external interface to communicate with the PC, wouldn't it be cleaner to modify the VGA or HDMI interface to report the rotation like a display that has built-in rotation support would do, so you can use the automatic rotation support in the OS? (I'm not criticising the project - it's a nice piece of work - I'm just interested in how you came to the design decisions that you did)

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  • Control any remote from a Raspberry Pi (and Amazon Echo!)

    Actually I haven't yet added a second device so I can't advise yet - it's something I plan to do but with other commitments it may be about a month or so before I can work on it. You'll probably have worked it out yourself before I do! One (rather poor) solution that springs to mind - if there isn't a more sensible one available - would be to attach multiple IP addresses to your Pi and determine which device to enable based on which IP address it was accessed under. Whether that could be done by one listener on all IPs or whether you would need multiple copies of the listener, I'm not sure.Thanks for the heads-up on relay bounce - I guess it will be an issue for remotes where the key toggles something - with this remote it just reissued the same command, and two 'on's are still just ...

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    Actually I haven't yet added a second device so I can't advise yet - it's something I plan to do but with other commitments it may be about a month or so before I can work on it. You'll probably have worked it out yourself before I do! One (rather poor) solution that springs to mind - if there isn't a more sensible one available - would be to attach multiple IP addresses to your Pi and determine which device to enable based on which IP address it was accessed under. Whether that could be done by one listener on all IPs or whether you would need multiple copies of the listener, I'm not sure.Thanks for the heads-up on relay bounce - I guess it will be an issue for remotes where the key toggles something - with this remote it just reissued the same command, and two 'on's are still just an 'on'. The remote has separate on and off buttons.By the way have you seen this? https://hackaday.io/project/6820-amazon-echo-voice-command-automation

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  • gtoal commented on randofo's instructable $2 Bill Pad1 year ago
    $2 Bill Pad

    No state income tax in Texas may be preferable in the long run, at least until you retire, and then move to a 'no sales tax' state!

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  • How To Use A Magnet To Easily Pick Up Metal Filings

    This is something that everyone who has ever tried to pick up iron filings does on their second attempt :-) Hopefully by publishing this you'll save a few people one wasted magnet on their first attempt!

    This is something that everyone who has ever tried to pick up iron filings does on their second attempt :-) Hopefully by publishing this you'll save a few people one wasted magnet on their first attempt!

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  • gtoal commented on abhinavonowinew's instructable How to replicate fingerprints1 year ago
    How to replicate fingerprints

    I use Instamorph (polycaprolactone) for the mold and Oogo (caulk) for the cast. Much cheaper than Sugru!

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  • gtoal commented on fiberartsy's instructable DIY Foaming Hand Soap - Save $$$!1 year ago
    DIY Foaming Hand Soap - Save $$$!

    Reusing disposable foaming dispensers is a smart idea but this formula is way overkill. All you need is just dishwashing liquid, watered down to approx 1:10.

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  • How To Get Rid of Fruit Flies in Your Home

    I live in South Texas where you'll see drosophila appear out of nowhere if you let a banana get even a day beyond ripe :-) But they disappear as soon as the fruit is disposed of. If you have a chronic problem, it's unlikely to be fruit flies so an alcohol/sugar trap is unlikely to work. I have however found that small ants are very attracted to saucers of sugar and they are easy to eliminate with a spray of windex or similar once the saucer is full. Two or three days of this can get rid of an incursion quite effectively.

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  • gtoal commented on Diyified's instructable Portable Personal Cooling System1 year ago
    Portable Personal Cooling System

    I don't think the Peltier would be strong enough to substitute for the ice but I'm fairly sure it could be used to cool down the water on return and allow you to recirculate it. Even if you couldn't 100% maintain thermal equilibrium, it might extend the working period significantly. In any case you earned my vote for this competition :-)

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  • Raspberry Pi media player and work station with an integrated speaker

    What do you think of the virtual keyboard? (I found it quite unusable, to the extent that I'm saving my display until I have some full-screen custom application I can use it on that doesn't require a keyboard.)

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  • Control any remote from a Raspberry Pi (and Amazon Echo!)

    Yep, the idea is definitely expandable. I'd probably use something like http://www.ebay.com/itm/CD74HC4067-16-Channel-Analog-Digital-Multiplexer-Breakout-Board-Module-Arduino/121817976911?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D35389%26meid%3Da5d8654b1ec14a5b8c8036186854e900%26pid%3D100005%26rk%3D5%26rkt%3D6%26sd%3D161724821543 to select the remote...

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  • DIY Hacking your own Home Automation System

    This is really good work, but quite complicated, which limits how many people are likely to build it. I came up with an easier way to control outlets by using a handheld remote that is triggered by relays controlled by a raspberry pi: https://www.instructables.com/id/Control-Any-Remote-From-a-Raspberry-Pi-and-Amazon-/ - Pi programming is a lot easier than arduino programming, though maybe not as much fun.

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  • gtoal commented on johnredearth's instructable Automating Model Submarines1 year ago
    Automating Model Submarines

    This looks like a fun hobby! Do you have to keep the antenna above the surface or can it go deeper and keep in radio contact? Have you programmed a failsafe to return to the surface if radio contact is lost? Any thoughts about using a 9DOF accelerometer/gyro/compass and GPS for planning a route or bringing it home automatically if you lose radio contact?

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  • gtoal commented on Diyified's instructable Portable Personal Cooling System1 year ago
    Portable Personal Cooling System

    have you considered using a Peltier to regulate the reservoir temperature? It would need some radiative fins on the back to have somewhere to pump the heat to, but it could be done I think... Also, could this be powered by a solar panel on the camelback?

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  • Home Automation with Amazon Echo voice control

    I used your instructions in my Instructable, https://www.instructables.com/id/Control-Any-Remote-From-a-Raspberry-Pi-and-Amazon-/ - thanks! - really easy and very effective!

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