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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by danadak

  1. danadak

    Line follower robot without a microcontroller

    Of course the circuits could be modified with adding simple diodes in series, 1 in series with each current limiting R, for the LEDs and output transistor base drive limiting R's.
  2. danadak

    Bad display on Dell Latitude c600 - need sugestion from a video recording

    Flex cables, and their connectors just problems waiting to happen. I always clean connector with contact cleaner, then blow it out with low pressure air. And wipe off cable contact end, again gentle operative word. I have found high pitch connectors like this with contacts soldered down on...
  3. danadak

    EASYEDA simulation interpterion?

    Your LM358 is operating open loop, no negative fdbk, essentially as a comparator. I would start there. Not an EDA user, but where is VCC value defined ? In settings ? C2 has no terminating load so not sure why its even there....
  4. danadak

    Line follower robot without a microcontroller

    https://makingcircuits.com/blog/simple-line-follower-circuit/#google_vignette https://www.circuits-diy.com/simple-line-follower-circuit/
  5. danadak

    Crazy things happen with programmer

    10x or 1x setting on probe, same for scope setting. Just seems low..... Scope set to infinite persistence ?
  6. danadak

    Crazy things happen with programmer

    When you work on power rails very good tool is put your scope on infinite persistence, AC, 100 mV per box, and evaluate PK-PK noise. Use that as you select bypass cap sizes. Very effective. Note not all caps, for same capacitance, are equally effective. And in mixed sig designs always use a...
  7. danadak

    PWM replacement for car lighting dimmer

    Dont forget to protect circuit from load dump : https://www.ti.com/lit/snva681 https://www.ti.com/lit/pdf/snoaaa1...
  8. danadak

    ATtiny85 upload on Sparkfun Tiny Programmer 11801 250502

    You might report that to Arduino IDE team, on their site. If this is trashing 10's of thousands of these USB programmers they can code for multiple VID/PID. This is nuts...... By the way when I saw PID in your original post I was thinking Proportional Integral Differential controller, now...
  9. danadak

    ATtiny85 upload on Sparkfun Tiny Programmer 11801 250502

    What do you mean by PID, SID ?
  10. danadak

    ATtiny85 upload on Sparkfun Tiny Programmer 11801 250502

    This is not a problem for you : https://learn.adafruit.com/usbtinyisp/f-a-q lots of info I program ATTINY85 often using a Uno or Nano board loaded with ISP firmware from the Arduino IDE. So far pretty consistent.
  11. danadak

    Sump pit water alarm - Kicad 9

    I think our goals similar : 1) Floats turn on/off pump 2) Detect if pump exceeds user set continuous runtime allowed, eg. float stuck or pump capacity not dropping water level 3) Jog pump periodically when lower level float continuous value indicates no more water to pump (my case), until user...
  12. danadak

    Current sources in parallel...

    Actually if they are ideal, hence isolated from each others control loop, then should not be a problem paralleling. Same also is true for non ideal. As long as control loop / current sense is not downstream of load all should be good.
  13. danadak

    Need Help with TDA7294 Stereo Amplifier

    A quick test, if you choose not to do design analysis, take a tone generator, at some moderate volume and freq, and using your IR handheld thermometer apply the generator, first getting ambient reading off TDA package, and then apply generator and get reading after some period, say 10+ secs or...
  14. danadak

    Need Help with TDA7294 Stereo Amplifier

  15. danadak

    Sump pit water alarm - Kicad 9

    I used one switch, when float is up turns on pump, when it drops, to turn pump off, in code, added additional user config runtime value to continue running pump. To pump down further then float off detected level. The additional runtime value determined by user trial. I think your approach...
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