Owen

Most recent activity

• PWM many 12V/100mA LEDs

  @Owen started

  • 4 comments
  • 1,441 views

  @Gordon replied
• PWM many 12V/100mA LEDs

  in Electronics • 2 years, 8 months

  

  I don't think my eletricronic knowledge isn't good enough to create custom pbc using chips like that. But it's a good option.
  For now I found these DMX decoder boards that can supply 9-24V@4A per output which is more than enough.
  https://www.aliexpress.com/item/1005003306910345.html

• PWM many 12V/100mA LEDs

  in Electronics • 2 years, 8 months

  

  Hello,
  Sorry this isn't strictly Espruino related but wondering if someone could point me in the right direction.

  I'm looking at getting 50 of these 1W fibre optic light sources for an art project. https://www.adafruit.com/product/4168
  They are simply LEDs that require 12V and 100mA.
  My question is what do I need to be able to dim each one individually?
  I found this nice PWM LED driver board but each output can only handle 30mA https://www.adafruit.com/product/1429
  Do you know of any driver or other idea that could allow me to accomplish this?

• Plusing an electrical mechanical counter

  @Owen started

  • 9 comments
  • 2,352 views

  @Gordon replied
• Plusing an electrical mechanical counter

  in Electronics • 2 years, 10 months

  

  Thanks for replying. It's a very basic scope but works great for simple tasks like this.
  Here are the results, I'm no expert but I don't see any spike so I guess we're Ok?
  If you can see any issues please let me know.

  2V DC 0.1ms
  

  1V DC 0.1ms
  

  50ms view of pluses
  

  Video of pluses https://imgur.com/UJp8tJp

• Plusing an electrical mechanical counter

  in Electronics • 2 years, 11 months

  

  I have a cheap DIY oscilloscope. Would that do the job? https://www.aliexpress.com/item/1005002761916872.html

  This is a bit beyond me. If you can tell me how to set it up and what to look for I'll give it a go.

• Plusing an electrical mechanical counter

  in Electronics • 2 years, 11 months

  

  Also is it safe to wire this device directly to my Espruino?

• Plusing an electrical mechanical counter

  in Electronics • 2 years, 11 months

  

  After some more playing around I think I misunderstood the AC part.
  I don't think it requires AC but rather 'alternating' pulses. When wiring up the counter directly to pins A0 & A1 the following code works.
  Can you see any issues with this? It seems to work Ok, but I'm worrying I'm still misunderstanding something.

  var  on = false;
  setInterval(function() {
    on = !on;
    digitalWrite(A0, !on);
    digitalWrite(A1, on);
  }, 50);
  

• Plusing an electrical mechanical counter

  in Electronics • 2 years, 11 months

  

  Hello,
  I have an electrical mechanical counter that I'd like to control with Espruino.
  https://www.ivy-metering.com/russia-market/196.html

  The counter takes a 5V pulse to count up, which sounds simple but apparently, it is 5V AC, not DC.
  Does anyone know how I can pulse 5V AC for 50ms?

  Thank you

• P3 RGB pixel panel

  @Owen started

  • 37 comments
  • 8,537 views

  @JumJum replied