author
33CommentsNW Pennsylvania, USAJoined October 19th, 2014
30 yr retiree from AT&T, skydiver in younger days, traveled extensively in USA.

Achievements

course completion badge
Welding ClassClass Complete!
course completion badge
Raspberry Pi ClassClass Complete!
Show 2 More »
  • JohnN3 commented on JustinN1's instructable Wifi Enabled OLED ESP32 Car Gauges4 weeks ago
    Wifi Enabled OLED ESP32 Car Gauges

    Great instructable. The problem for me as a senior citizen is that I can't see the details of an OLED at a distance. I'd like to see more projects using epaper displays :)

    View Instructable »
  • JohnN3 commented on Bodmer's instructable Spiro Rainbow Pattern Generator2 months ago
    Spiro Rainbow Pattern Generator

    I realize this is an old instruct-able, and I imagine there are some updates. I tried to load this on a pro-mini and the Arduino compiler returned an error that it was too large. Is there an updated version?

    View Instructable »
  • Add an Arduino-based Optical Tachometer to a CNC Router

    If you look at the signal from the phototransistor, you'd probably see a very distorted signal. There are several ways to approach this issue. First devise a distinct difference (change) on each revolution. For example if your spindle is highly reflective, paint or add a dull black line with tape, to be counted each revolution. The second thing to do is add a Schmitt trigger circuit between the sensor and the arduino. This will convert the varying analog waveform from the phototransistor and present a squarewave to the arduino. Hope that helps.

    Great instructable! After exploring several different approaches to a tachometer using Arduino, I came across this instructable. I was very pleased to see that it was much more stable than others. That being said , my application will be to use on an older tractor that has no tachometer. Since it is diesel, that is no ignition to sence, so optical seems to be the easiest way. The display is a bit small as mentioned, and hopefully a larger one will be incorporated in the future. The other issue I might have is the fact that my RPM range will be quite a bit lower since the peak power range of the diesel is arouind 1800 RPM's and max rarely going above 2800 RPM's. 1800 RPM's is the normal engine speed for a standard PTO output of 540 RPM's Obviously that will read correctly digitally but I...

    see more »

    Great instructable! After exploring several different approaches to a tachometer using Arduino, I came across this instructable. I was very pleased to see that it was much more stable than others. That being said , my application will be to use on an older tractor that has no tachometer. Since it is diesel, that is no ignition to sence, so optical seems to be the easiest way. The display is a bit small as mentioned, and hopefully a larger one will be incorporated in the future. The other issue I might have is the fact that my RPM range will be quite a bit lower since the peak power range of the diesel is arouind 1800 RPM's and max rarely going above 2800 RPM's. 1800 RPM's is the normal engine speed for a standard PTO output of 540 RPM's Obviously that will read correctly digitally but I'd like to be able to have a full scale deflection on the analog of about 3200 or so RPM's. Anyone have any thoughts on that?

    View Instructable »
  • JohnN3 followed gabriellalevine8 months ago
      • Two Ways to Reset Arduino in Software
      • DJI Groundstation Instructions for Flying an Octocopter on Autopilot
      • Interfacing U.fl Connectors
  • JohnN3 commented on AdventuresInJunkLand's instructable Fix Up an Old Laptop!8 months ago
    Fix Up an Old Laptop!

    @RaymondR6"...and there are sites to download "Chromium" which is Google Chrome for Intel processors...." If you want to know the actual difference between Chrome and Chromium go here. https://www.computerworld.com/article/3261009/web-...

    When things go right all is well. But I have 2 T500's and one won't boot. It simply stalls and sits with the power indicator on after the other indicators flash on then off. I've tried all the static/power drain "tricks" from across internet forums to no avail. So just because a unit looks in good shape doesn't mean it can be fixed without professional tools. (By the way I am qualified technician)

    View Instructable »
  • Installing  MQTT Broker(Mosquitto) on Raspberry Pi

    When I get here: mosquitto_sub –d –t armtronix_mqttI receive an error: Connection refused. I don't know where to go from here.

    View Instructable »
  • JohnN3 commented on SteveQuinn's instructable Using ESP8266 SPIFFS1 year ago
    Using ESP8266 SPIFFS

    Good info, I've uploaded a file but now I'm confused as to how to access it. What I uploaded was a gif file that I'd like to send to a web page. Can you elaborate on that or give direction as to where I might look to find that information? Thanks

    View Instructable »
  • JohnN3 commented on Mrballeng's instructable Make a Ring by Melting Pennies. 1 year ago
    Make a Ring by Melting Pennies.

    Apparently you didn't realize that melting coins is illegal us the U.S.

    View Instructable »
  • JohnN3 commented on Legandir's instructable Burn a New Bootloader - Arduino Pro Mini2 years ago
    Burn a New Bootloader - Arduino Pro Mini

    Hi Legandir, I did get it to work with some help from the Arduino team. It seems I have a pro-mini with some miss labeled pins. I got the boot loader uploaded. but I did notice that on some instances it would not accept a sketch upload without pressing the reset button. Any thoughts on that?

    Hi Legandir, I did get it to work with some help from the Arduino team. It seems I have a promini with so miss labeled pins. I got the boot loader uploaded. but I did notice that on some instances it would not accept a sketch upload without pressing the reset button. Any thoughts on that?

    View Instructable »
  • JohnN3 commented on Legandir's instructable Burn a New Bootloader - Arduino Pro Mini2 years ago
    Burn a New Bootloader - Arduino Pro Mini

    This doesn't work for me, I get this:Arduino: 1.8.1 (Windows 10), Board: "Arduino Pro or Pro Mini, ATmega328 (5V, 16 MHz)"avrdude: Yikes! Invalid device signature. Double check connections and try again, or use -F to override this check.Error while burning bootloader.This report would have more information with"Show verbose output during compilation"option enabled in File -> Preferences.

    View Instructable »
  • JohnN3 commented on jainrk's instructable Programming a HTTP Server on ESP-8266-12E2 years ago
    Programming a HTTP Server on ESP-8266-12E

    Didn't work for me so far. I got to step 8 and didn't see where the gpio pin "LED_PIN" was declared. Since I'm using a ESP12E I changed to gpio-4 by adding a declaration prior to setup of "int LED_PIN = 4;". Then added the next part to handle the request. Uploaded that and nothing happened. The serial monitor shows "Somebody has connected" and "Get /off HTTP/1.1" or "Get /on HTTP/1.1" depending on what I put in the address. The browser ( Chrome, on my smart phone) indicated "... the page was not working 192.168.4.1 didn't send any data...ERROR_EMPTY_RESPONSE". The gpio never changed states either. I've built servers using Nodemcu/lua in the past modeling from other examples. I wanted to move to the arduino IDE due to the slow d...

    see more »

    Didn't work for me so far. I got to step 8 and didn't see where the gpio pin "LED_PIN" was declared. Since I'm using a ESP12E I changed to gpio-4 by adding a declaration prior to setup of "int LED_PIN = 4;". Then added the next part to handle the request. Uploaded that and nothing happened. The serial monitor shows "Somebody has connected" and "Get /off HTTP/1.1" or "Get /on HTTP/1.1" depending on what I put in the address. The browser ( Chrome, on my smart phone) indicated "... the page was not working 192.168.4.1 didn't send any data...ERROR_EMPTY_RESPONSE". The gpio never changed states either. I've built servers using Nodemcu/lua in the past modeling from other examples. I wanted to move to the arduino IDE due to the slow development of the Nodemcu IDE platform. I must admit I'm just learning the intrices of Arduino IDE. It seemed easier using Nodemcu at least for me.

    View Instructable »