Pocket Siren updated!

I've just updated my popular Pocket Siren instructable with improved cutting files. The changes I have made are: Turbine blades widened at the base - massive amounts of use revealed a weakness in the base of the first version. Turbines engraved in the laser - rather than sanding them down, I placed a circle of engraving over the blades (watch your laser settings, make sure it's set to engrave). The axle is now also acrylic, not wooden, but you don't have to buy any acrylic rod! Lanyard/key-chain loop added to the central layer.

Posted by Kiteman 4 years ago

I got a siren!

A little over a month ago, my dad got a siren on eBay. It's the Wolo Model 345, about halfway down the page. Note: if you want one, go through eBay, Wolo wants $64, but this was brand-new for $20. It's not Instructable-worthy, and I don't have enough pictures to make a Slideshow, so I'm using the Forums for their original use. We were originally going to put this on my mom's ZAP Xebra, because it's completely silent and we wanted a way to warn walkers of her approach, but she didn't like it, so I got it to put in out Ford Courier. Since it's electric, I only go 39 in a 40 mph-zone to save range, so I'm often cut off by people going 45. Being electric, the truck has no radiator, just a flat plate of steel. We were already going to paint it black, so we mounted the horn speaker in there. There is an instrument bay overhead, so I stuffed the control box inside an empty slot. Eventually I'll take off the plastic case and mount it in the aluminum sheet to make it much cleaner, but this is fine for now. There were already two extra switches that did nothing, but already had an always-hot line running to them, so I wired it in to that. It can do sirens, animal noises, or a PA. I'm leaving it set to a police-style siren, so if someone cuts me off, I can just flip the switch and give a short blast, then watch them look around for the police car. If I have more time, I can just use the PA to yell at them. Other potential use: I'm going to make a CD of engine sounds. That way I can make my electric sound like an idling Harley at a stoplight. Or a turbine engine. Or a semi. Or a whatever.

Posted by CameronSS 10 years ago  |  last reply 7 years ago

What the purpos of the Capacitor ?

Hello everyone. My question is : In this circuit What the purpos of the Capacitor ? Thank you

Asked by layal_1 6 years ago  |  last reply 6 years ago

How to make a air raid siren? ?

Mainly want to know about the secton that makes the sound , impeller and stator,

Asked by jmalcolm 7 years ago  |  last reply 7 years ago

how to built a two tone siren ?

I will have to built its circuit first and then how to implement it.

Asked by abhi4u 9 years ago  |  last reply 8 years ago

how do you make a siren out of knex???

Ive seen other sirens without instruckions made of knex but not one WITH instructions. can you show me or make an ible on one and post the link on the answers collum. thanks

Asked by knex gun and grenade maker 6 years ago  |  last reply 6 years ago

What are these electric components?

Hello guys I thought you could help me out with this a little bit. So I went to the dollar store looking for some. I'd like hack some to what I want, but first I need to know how it works! Um want to know what these things are on the board and what it is. So, I want to know what that black blob is on PCB and also that barrel shaped thing and why is the siren hooked up to that barrel. Thanks guys!

Posted by HavocRC 6 years ago  |  last reply 6 years ago

Infrared Beam Burglar Alarm

Could someone please tell or show me a fairly inexpensive way to throw an infrared beam across my office and once it's tripped by an intruder an outside alarm or siren (I mean the loud ones-like you can hear several blocks away)would go off. I'm so impressed by the quality of minds on this website. I know someone can probably help. Bless You All.Thank You So Far!

Posted by ropor 11 years ago  |  last reply 6 years ago

air raidsiren help?

Http://www.youtube.com/watch?v=agejuU2rYDs please help me make one of theese and find where to buy the motor! i made a video too

Asked by knex gun and grenade maker 7 years ago  |  last reply 7 years ago

my son wants firetruck lights

So my 3 year old has his heart set on being a fire truck for halloween - but he wants to have the lights on his head ... does anyone know how I might go about making a hat with flashing lights?  and where I would need to go shop to find the lights, wire, etc...

Posted by Mino_33 6 years ago  |  last reply 6 years ago

Wiring motion sensing light to include a 120V AC siren?

Here's the goal: to have a wired, outdoor, motion sensing flood light that includes a 120V AC siren that will also sound whenever the light is triggered.  The proposed setup would start with some sort of switch or hidden switched outlet (possibly WeMo so only I can control it and I can also tie in some IFTTT recipes) that the whole system would run through.  Power would then run to an off-the-shelf motion sensing flood light not unlike this one.  From there, one of the light fixtures would be rewired to run power to a 110V AC horn/siren not unlike this industrial unit.  Is there any glaring reason that this would not work, and what considerations should be made vis-à-vis the fixtures wattage rating and the rating of the siren?  The final product should be something that when switched off is just that...off, and when switched on would trigger a light and a very audible siren.  Finally, any ideas on where to look for a siren/horn like the one described?  The industrial unit in the link might be a bit too big. fdsafdsa   fdsaf(not un From

Asked by robodoppleganger 3 years ago  |  last reply 2 years ago

how can i increase and rise the voice in my circuit ?

 hello  My project called " Four Tone Siren "  this is the circuit for my project .... I really need to increase the voice because it's very small you can't hear it except if you put the circuit close to you   and i only hear 3 tone and my project is 4 tone.  can you tell me please what is the reason ? my final project after 2 days please :(  this is my parts : IC UM3561 Resistance = 220 Ohms Condenser 100Mfd Transistor BC548 Battery Container 3V Switches Breadboard

Asked by layal_1 6 years ago  |  last reply 6 years ago

I wish to make a tiny siren

I want to make a tiny (about the size of a standard watch) circuit that emits a human-like voice(may sound very electronic) or even a siren at a very high volume(100DB or so)..sort of like a personal alarm system.I know such systems are already present, but I want to make one myself(to gets ideas for further miniaturization)...I'm sorry if I sound like a noob, but I'm a student of computer science and know VERY little about electronics(do want to learn though) any ideas in this direction?should I start off with an amp or a mechanical siren(like the air raid ones). I have very little idea in this regard and just need a start off point. (or should I just get one of those sirens and try to reverse engineer it?)

Asked by gaurdianknight 6 years ago  |  last reply 6 years ago

How to make a Rf controlled small siren?

I need to make a small battery powered loud(120dB+) electronic siren that is turned "on/off" by a key FOB type RF remote. I am currently trying to train my dog to not dig holes, etc, and need a small siren that can fit on her harness collar. I need to be able to push a button on the remote to make the siren wail, until I release the button. remote needs to be RF not IR. Any ideas?

Asked by wolfsmane 9 years ago  |  last reply 9 years ago

How can I make a small Piezo Police siren, on a small footprint for HO Scale Model Railroad.? Police cars, ambulance etc

I have taken a little ambulance apart, which has a little piezo siren and flashing lights. I can create the flashing light circuit but how can I get the siren circuit ..?

Asked by HarrisCreekCentral 9 years ago  |  last reply 9 years ago

How can I build a siren when my UPS detects a power cut?

Alright, I have a large server set-up in my closet, and just recently I had a power cut, which, if not for my backups, I would have lost everything (photos, videos, documents, my soul etc.) The problem was it was in the middle of the night, and the UPS (for some reason) didn't shut down the server when the battery drained. So I want to design a system where if the UPS is tripped, some sort of siren or flashing light goes off, so if I'm asleep, I can get up and safely power down everything. Any ideas?

Asked by asasklfjklasfkljasklfjaklfsjkl 8 years ago  |  last reply 6 years ago

How do you make a fake turbine drill out of a plastic siren whistle?

Dose anyone know how to make a turbine drill out of a plastic siren whistle? Manly I want to make a fake dentist drill with a plastic drill bit attached to the whistle turbine.

Posted by elkaddalek 4 years ago  |  last reply 4 years ago

my motherboard wont open and there is a sound like sirene when i turn it on. what is the cause of that sound?

My motherboard wont open and there is a sound like sirene when i turn on the motherboard. what is the cause of that sound and what will I do do open it?

Asked by 9 years ago  |  last reply 9 years ago

Arduino intruder alarm modification

We have a professionally installed burglar alarm system that dials out (over a dedicated landline) to a monitoring station when an intrusion is detected.  I'd like to modify it to send us an SMS (via the mobile phone network) and/or email (via wi-fi on a different landline) as well, just in case the phone line is cut, and to make sure we get notified immediately - the monitoring station tries to call on the landline first, then it calls our keyholders and the police, which all takes time.  If I'm 5 minutes away and the alarm is triggered, I'd like to know straight away so I can rush home. The alarm company have quoted a huge sum to make this change, because an updated control control panel would be needed to deal with the texting/emailing.  I can't go cutting into their system or it will invalidate the maintenance contract, so I need to pick up when the alarm is triggered without any physical connection.  Short of remotely detecting a current in the cable to the siren (a 12V DC signal, so how would I detect that?) it occurs to me that using Arduino to listen for the siren might be the best bet.  But I'm an Arduino beginner and I have no idea whether it would be better/easier to detect a noise over a certain threshold - the siren is very loud, but the noise from the adjacent road can be pretty loud too - or to try and detect the particular sound frequency of the siren.  All suggestions gratefully received. 

Posted by Yorkshire Lass 2 years ago  |  last reply 2 years ago

Laser alarm circuit

I am searching for a circuit which can drive a siren circuit like this and can be activated by a laser pointer.I have tried a lot of these circuits but all had the same problem:The siren sounds only for a few seconds(As long as the interruption of the laser beam...) Thank you in advance!

Posted by pizza1993 7 years ago  |  last reply 7 years ago

Instructables and Eric on Revision3's Pop Siren Episode 3 - Jackhammer Headphones and LED Floaties

Watch me build Jackhammer Headphones and LED Floaties, and talk about Living an Aesthetic Life on Revision3's PopSiren.The Instructables segment starts at 16 minutes.

Posted by ewilhelm 10 years ago  |  last reply 10 years ago

How can I make a siren chime for a few seconds when a laser hits a photo resistor using a 555 timer chip?

I am trying to make a target for my laser for camping trips. I don't know how to create my own arduino codes to program an ATtiny so I was hoping to create a monostable circuit using a 555 timer chip instead (If monostable is the correct circuit). Basically I have a 6-14V siren and want it to chime for at least a second when the laser beam hits a photoresistor during day or night. I have tried but to no avail, since I have not been able to understand the ways of the 555. Any suggestions with or without a 555 timer chip are completely welcome. 

Asked by KevinAlien26 6 years ago  |  last reply 6 years ago

What can I do with piezo buzzers/sirens/beepers, switches, safety switchs, and other basic components?

I have some components I really like, but I don't know how to use them!!!  (resistors, leds, 555 timers.. etc.)? relays even?

Asked by sjoobbani 8 years ago  |  last reply 7 years ago

Boom-box ambulance

An emergency siren that alerts drivers by making their vehicles vibrate is being tested by doctors in Hampshire, England.The Howler is being used by BASICS Hampshire, a charity made up of 20 volunteer medics who attend about 750 road traffic accidents every year. The Howler sends out low bass sound that makes the car in front "shake".Dr Rob Dawes, a volunteer doctor whose full-time job is as an hospital anaesthetist and military doctor, said people get out of the way quicker when the device is used.He said: "The main problem is on the motorways where people can't hear the sirens or see you, because often they either don't look in the mirrors or they've got the radio on quite loud."What this new siren aims to do is, because they can't see you and they can't hear you, we hope that they'll be able to feel you." BBC Story.

Posted by Kiteman 9 years ago  |  last reply 8 years ago

What kinda relay do I use to close a circuit when a siren goes off?

I bought some of these http://www.amazon.com/gp/product/B000IF6URO/ref=ox_ya_oh_product and would like to wire up a usb gamepad to detect the siren as a button press. I'd assume this should be very simple the relay will connect to the siren speaker. I can then write an app to email/text message me if the sensor detects water on my kitchen floors.I'd like to know what kind of relay to use (how much power, an exact one would be nice), I just need a momentary circuit close (similar to pressing a key).I'm a programmer with a limited knowledge on circuits.

Posted by sylentmode 9 years ago

How do I get a script to turn on a strobe light via USB

Hello, I am really at a loss how to do this so would appreciate any advice. I use Splunk and within it you can set for a script to run when an alert happens, so what I want to do is when an alert happens for a strobe light and a siren to sound. I haven't got a clue what kit is needed or the spec to do this? I suspect it will be some kind of a USB relay and obviously a strobe light and siren. Not sure how it should be wired up, I guess mains power (240v) to the strobe/siren positive and the negative connections to the USB relay? Then the scripting is there any free/sample scripts anywhere that can be used? Thanks for reading Guy

Posted by j666gak 6 years ago

Simple alarm system

How can I build a simple alarm system for a garage using a 30 watt 12 volt siren, a keyed outside activation switch and an inside motion detector. 110 volt power in garage.thank yougarry

Asked by garhug 2 months ago  |  last reply 2 months ago


What is a good place to find piezos? I know I can find them in some old computers and cheap toys with "sirens" in them. What other devices readily have piezos installed? (....and please spare me the sarcastic answers about finding them at Radioshack)

Posted by randofo 10 years ago  |  last reply 10 years ago

Advice; How to convert a smoke detector to use a recorded message

Hi, First post...be gentle! Trying to find someone to guide me through converting a normal, off the shelf, home smoke detector so that it emits a pre-recorded message, rather than the usual siren. Anyone? Thanks Naldo

Posted by naldo58 2 years ago  |  last reply 2 years ago

Free Speakers

I was just Curious if anyone knew any sites that offered free samples of speakers besides www.pui.com. and for thoughs that don't know pui.com offers free samples of there speakers piazo benders sirens mics ect. iv only ordered speakers but they do make a good product my favortes espeshally for home systems are the AS10004ps-r, and the AS7708ps-3.

Posted by juggalo_assassin183 10 years ago  |  last reply 10 years ago

Free Speakers

I was just Curious if anyone knew any sites that offered free samples of speakers besides www.pui.com. and for thoughs that don't know pui.com offers free samples of there speakers piazo benders sirens mics ect. iv only ordered speakers but they do make a good product my favortes espeshally for home systems are the AS10004ps-r, and the AS7708ps-3.

Posted by juggalo_assassin183 10 years ago  |  last reply 10 years ago

Free Speakers

I was just Curious if anyone knew any sites that offered free samples of speakers besides www.pui.com. and for thoughs that don't know pui.com offers free samples of there speakers piazo benders sirens mics ect. iv only ordered speakers but they do make a good product my favortes espeshally for home systems are the AS10004ps-r, and the AS7708ps-3.

Posted by juggalo_assassin183 10 years ago  |  last reply 6 years ago

wireless electronic device

I am looking to build a device that can communicate with a phone and through that phone you could turn on or off a light or a siren with fairly long range 20 to 30 meters (60 to 90 feet). Would anyone be able to help regarding this device. I am looking for it be as small as possible. also i wanted this device to run with fairly low voltage dc power source. please help with this  thanks

Posted by sam501 6 years ago  |  last reply 6 years ago

How to make a speed meter to stop cars from speeding?

Ok folks, I live along a street where people come blasting through, and I want it to stop considering there are kids who kindof like to play on it. Here is born my idea: A speed meter that sits in my yard. If it senses a car going faster then about 30 MPH, it will automatically set off a siren, scaring the crap out of people and making them slow down. I don't want to hear about how this may/may not be illegal, I'll go to jail if its for the sake of saving our kids lives. So I was thinking about how to do this. An Arduino might work...but I would have to find some type of speed meter to use as a serial device for the Arduino, and after I did this, it'd be pretty easy. Just wire up a siren to a relay on one of the Arduino's outputs and away I go. Anybody know where I could find a speed meter that will work with the Arduino?

Asked by tyler9613 8 years ago  |  last reply 8 years ago

how can i wire my car to call my cellphone when my car alarm is going off?

I would like to wire an old cell phone to my car alam so that it will call my new cell when it is triggered i live in an aptmt building on th 18th floor so it it is inpossible th hear the siren .....if any one can help please let me know how

Asked by alldemcarz 10 years ago  |  last reply 10 years ago

Why flashing Laser Died?

I have a laser pointer from the dollar store which I have hacked to fit a usb cord. 3 button batteries came with the laser, so, I figure 4.5v is right. Then I was hacking a magnetic door alarm (siren when the magnet is away from it) Again- 3 batteries, so 4.5 v plus or minus x. The alarm hack is to provide pulsing DC when the magnet is spun in a drill past the reed switch in the alarm. So, I plugged the laser into the pulsing DC, and it worked for a while, then crapped out.Why did it die? slightly different v from different chemistry in the batteries?or from flashing?

Asked by Toga_Dan 11 months ago  |  last reply 11 months ago

Nerd Alert!

I am heavily involved in letterboxing. I've seen letterboxing posts here on instructables, but just in case it's not a familiar topic, it's a hobby similar to geocaching. Especially when we have events and get-togethers we will often engage in self-deprecating humor about our nerd status. For upcoming events I would like to create either of the following props, and would appreciate any ideas on how to approach them: (1) Nerd Detector--some sort of box that would have some sort of motion or proximity sensor that would trigger an alarm, siren, etc., when approached. (2) Nerd Tester--something akin to the "love tester" from old, old-school arcades. Someone would grip a handle, and some sort of meter or display would indicate the participant's (supposed) level of geekery. Thanks for any ideas!!!

Posted by Purple Chez 5 years ago  |  last reply 5 years ago

Arduino 12V Car-alarm with PIR sensor and remote control - expertise needed. :-)

Hi all, This is my first "big" Arduino project and my first fritzing, so please bear with me. :-) Goal: - Build the cheapest possible car alarm system with a loud siren - It should be possible to activate/deactivate the alarm with a remote control. - The alarm will once activated, sense any motion in the car (if someone breaks a window and tries to steal anything) and set of the alarm. - The system should not drain the car battery so it should draw a minimum of power. I've managed to build the first few things, but some vital steps are still needed and I hope you can help me sort these out. Components used so far: Arduino Pro Mini - TIP122 transistor - 2.2KOhm resistor - 1N4002 diode - Mini piezo siren (I used a 107dB siren with an operating voltage of 6-15Vdc and current consumption of 140mA) - Breadboard - Lots of wires I'm currently waiting for my PIR sensor to arrive together with the RF receiver/transmitter module, so for now I've added a basic switch to act as the PIR sensor and another for the RF module (activate/deactivate). The components I'm waiting for are: - An RF module that I need to order once i find the right one. - http://www.ebay.com/itm/261041100836?_trksid=p2060... Questions that still remain and that I hope you can help me with: 1. The arduino should be powered by the cars 12V battery, however I've read that the car battery must be regulated as it delivers anywhere from 12 - 16V. I could connect it directly to RAW but in case the battery peaks above 16V i risk damaging the Arduino. I'm very unsure as to how I do this regulating best? One option could be to buy a "DC-DC step down converter - 4-35Vdc > 1,23-30Vdc" and set it to 5V, but maybe a more simple and/or cheaper solution exists? 2. Since the power consumption should be kept to a minimum, I plan to add the RF before the step down converter so the powering of the regulator (step down converter?) only happens if the alarm is activated from the remote. First question is: can I use a TIP120 for this and simply connect the RF to base, and the regulator to the collector? Second: In this case, the Arduino will be powered off the hard way by cutting power when deactivating the alarm from the remote - can the arduino take that in the long run? and finally, the RF receiver needs to get its power from somewhere, so what can I do here - is the best thing to use a 12V RF module instead of the Arduino 5V RF module or can this be solved some other way? 3. Any good ideas for minimizing power consumption? 4. Anything I can do to further improve the design? :-) I'll update this post as I progress with the project including a more detailed step guide to how to implement this and the source code I'm using. Instructables arduino posts and commets have helped me a lot during over the past few weeks working with Arduino so I hope you can help me reach the finish line with this project. Br. Jakob

Posted by Zyb3r 2 years ago  |  last reply 2 years ago

Scholarship Submission: Emergency Pathfinder

Here is my idea on what the iCreate can be useful for, and quite possibly save lives: Have the robot follow the parameter of the house, using special indicators to map out the doors. This would most likely be something like shining a flashlight on it with the robot reconizing that through a photosensor. Once it maps the doors it lays dormant in it's initial starting position, either under a desk, in a hallway or wherever. It would enter a low power consumption sleep mode in which it would take carbon monoxide/smoke readings through a sensor every 1-2 seconds. If it detected a preset level of CO/smoke it would make a high speed pass to each of the doors it had learned about earlier and take additional CO/smoke readings as well as temperature. It would then return to the door with the lowest reading and use high intensity LEDs and a 15w or 30w siren to alert residents that there is in fact a fire and which exit is likely to be the best way out. This design isn't nearly as complicated as some of the others, but I believe it is something that could definately be pulled of and could actually provide some benefit to everyone.

Posted by asyn 11 years ago  |  last reply 11 years ago

How to I wire and circut board 10 leds to a car to flash in two separate groups sort of cop lights but just one color?

Im working on a circuit to work off of a car batt, and well to be honest I dont know where to go. Would you be willing to give me some help maybe if you have it some where a diagram? I have 10 LED's and I want 2 sets of five to flash more like strobe to be honest. This is the info on the LED's Luminous Intensity: 27000mcd typ. @ 20mA Max Forward Current: 30mA Pulse Current: 100mA for <= 10ms, duty <= 1/10 Forward Voltage: 3.2V typ. 3.5V max @ 20mA Max Reverse Voltage: 5V Power Dissipation: 105mW Operating Temp: -30 to +85 C Soldering Temp: 265 C for 10 secs Max Reverse Current: 50uA @ 5V I would like it to flash very quickly 3 times then switch to the other side. Is there a way to control the speed and number of flashes? And how does it work being only 12v in but the lights are going to drain 32v? And a second question I would like a megaphone was well. Something that has like a siren, some other sounds, that old chitty chitty bang bang car horn would fricken awesome, and a microphone input would be cool. But this is secondary to the flashing lights. Is any of the possible? Thank you!

Asked by espinobj 8 years ago

Ball counter or weight sensor with relay to sound alarm or trigger 9v confetti cannon

Anyone interested in a bit of work...I could also run it as a competition. Apologies in advance if what I am doing in not allowed on instructables, but I couldn't find a place to offer this work. Peoplehour does not specialise in tech gadgets! I am a one man band training business in the UK. I am trying to find someone to make this gadget to work with my Gravity Ball Game. Gravity Ball is a two hour team building activity. Gravity Ball requires teams to design and build a construction capable of transporting a ball from one zone to another; the ball must roll freely along the construction using gravity only. There will be a shared zone that will require team collaboration, co­operation and coordination. Everyone needs to contribute to the overall team objective whilst ensuring their own structure functions to a specific brief and works correctly. All teams will release their designated ball (tennis ball, golf ball, cricket ball, squash ball. Etc.) at the same time. Each team ball will roll freely along the team structure, into the shared area and the fall into a collection container. When all the balls are in the container (and a specific weight achieved) then the Weight sensitive relay switch will detonate a electronic confetti cannon. Alternatively, an infra red or sensor can count the number of balls that pass at a particular point and when the designated number is reached, the confetti cannon will detonate The detonation will give a wow factor to the team activity. Considerations: I need a gadget, Arduino, raspberry pi or beaglebone that can measure or count the number of ball and then detonate a confetti cannon or sound an alarm • Programmable weight or ball counter setting • Maximum weight 300g-400g or Maximum number of passing balls is 10 • Work with standard electronic confetti cannon from Confetti Masters, alarm or Siren (http://www.confettimaster.com/streamer.electric.confetti.cannons.html) or Showtec electric cannons (http://www.sblite.co.uk/598-80cm-multicolour-electric-confetti-cannon.html) Message me if you are interested! Kind regards Canute

Posted by GreenflashUK 3 years ago

So if you purchased a used ambulance... What would you do with it?

I work at a private ambulance company, and I made friends with the head mechanic and found out he may sell me a used diesel ambulance, fully functioning, for a little more than $1000. In order to justify my purchase, I would need an idea of what I could construct out of the ambulance I would now have in my possession.  My first thought was: A-TEAM VAN REPLICA I would speak with a couple tech colleges and offer them the ambulance for a semester, free of charge, for them to train on. It would be a prime example of the real world of a diesel mechanic's future career. Then go to the same, or a new tech college and find the car detailing or modification department and let them create the projected A-TEAM replica van. I would not only let them use a fully operational vehicle to modify to their liking, I would also use my above average graphic arts skills, and work history in direct mail advertising, to design a mailing to put out for them promoting their school and department of it, and then show awesome before and after pictures of the ambulance, and use it as an attentioN-getter to draw new students into their programs. A-TEAM VAN, with paint mods and maybe diesel engine modifications. ...Or I could mount large speakers in the external cabinets that i could just open up and lock them at 45 degrees, and stand in the middle of the back doors with a microphone and a couple computers mixing dance music. ...The lights and sirens and PA horns are all still in it and working.... I am just trying to drum up some of your creative passions and make you get out your thinking caps to run ideas by me and see what I might be able to do with this new toy! Lets get the ball rolling! I say an A-TEAM van would be sweet... What do you think? See attd, pictures.

Posted by Spitster1 7 years ago  |  last reply 4 years ago

Home Security

I'm planning on setting up a simple home security system for my home. I was thinking of using Wireless IP webcams, placed in strategic locations, monitored by software with a motion sensing function. I would tweak the sensitivity and add null zones as needed. I would probably only use two or three cameras to start out, and have the software save ten or twenty seconds of video when the motion sensor was triggered. EASY. Once I have the motion sensing bugs worked out, I'd like for the software to email/text message me. I think most of the security programs for webcams out there can do this. I've had good experiences with one program that also let you run an image server so you can view current images through the internet. The TRICKY part is how I would like to set up the network of wireless IP webcams. What I was hoping to do is have one machine that was dedicated to running the cameras. My goal was to use my two wireless routers so that I could have two seperate networks, one for the cameras, and one for all the other devices (laptops, desktops, game systems, printers). My question is, do I connect the router for the cameras to the computer that will run the security software, or do I plug that router into the router for the other devices? I've never worked with two of these small LinkSYS routers at the same time, so I'm not sure if I should be trying to create some sort of network bridge, or if I would maybe connect the camera router and camera computer via the WAN port of the router, since all of the camera images would be displayed on a image/web server running on that computer, accessed from the internet via the other router. Also, I've never worked with wireless IP webcams, so if there is any sort of quirck that I should know about that your average instructables user couldn't figure out, any help or advice with that would be much appreciated as well. Thanx Tony P.S. Eventually, I'd like to add in a strobe that would blink and a siren that would sound for a short time. I think I could figure this part out with "Pico Servers" and some relays.

Posted by NozeDive 10 years ago  |  last reply 9 years ago

Basic electrical engineering question Answered

Although I can carve my way through data and can tell you a lot about how data is stored on various mediums, I am not the best electrical engineer, but I still do some projects for fun. I have a project that I am working to help a friend of mine who works in a climbing wall.  They had an existing siren at the top for the kids that someone broke, and wanted to switch it out to something that they could put custom sound effects on.  I happened to think of the 9V recording module at Radio Shack (http://www.radioshack.com/product/index.jsp?productId=2102855#tabsetBasic), and proceeded to hack it to make it more usable for their needs.  I made two different parts to it: 1.  The recording module in a project box, and 2.  A momentary switch at the top of the wall to trigger the module.  I changed the microphone on the recording module to a 1/8 in jack, sent the speaker output to a better speaker (with an amp of course), added a record button to the outside of the main project box, and created a "triggering system" by soldering a separate wire to both 1 and 2 in the picture, and then shorting it whenever I want to trigger the sound.  It worked perfectly in my shop, but when I installed it, the test trigger on the ground works, but the switch on top of the wall does not work well... it only works intermittently.  The wall is 2-stories high, so figure a 22 foot run for the wire (and I don't remember what gauge wire I used... it was just something I had laying around... but figure cheap speaker wire). My first guess was that it wasn't getting enough power from the battery, so I switched it out to a AC-DC adapter instead of the battery.  I am still having problems, so I am guessing it is too much resistance due to the long run?  (Would you agree or disagree?)  If so, is there some type of amplifying circuit that I could use to overcome this?  The only other explanation that I have is that the momentary switch that I am using at the top is pretty old and could be going bad, but I wanted to check first and see what you EEs out there think. Thanks for your help!  :) Edit: I'm sorry I am so bad at explaining this... I have uploaded my attempt at a schematic for clarification. Edit: After installing a new switch, it did work a little better, but still not 100%; so I installed the relay, which solved the problem.  Thanks to everyone who helped!  :)

Asked by thegeeke 5 years ago  |  last reply 5 years ago