Welcome - Please Read

Welcome. I wanted to provide stripboard layouts I've made to help people new to electronics and even the more experienced get into different aspects of electronics.

I verify the layouts before I post them.

My Facebook Group: www.facebook.com/StripboardLayouts - Please Add For Updates!
My Twitter Thing: @InSonicBloom

Saturday 30 November 2013

Adjustable Load Stripboard Veroboard Layout


I've done a similar adjustable load before but I've tweaked this one a little so it performs better and so on.
PSU UT = power supply under test
the one I made can sink over 2 Amps. you just need to make sure you have a big heatsink.!

it's also a good idea to mount the big resistors offboard cause they get hot.




9 comments:

  1. The resistors i do have are 1% 10ohm. They are very good quality. I don't get any load drawn Nothing happens. What to check? Doing some testing and where? Thanks vince

    ReplyDelete
    Replies
    1. I would check pin 8 is around 5 volts for a start.
      also you have to connect this circuit to the ground of the power supply under test

      Delete
    2. i did not connect ground from power supply under test, ok. ok i check the pin 8. and report back. thanks Paul. Vince

      Delete
  2. i am sure your circuits work. All that i built from you have not worked? The dancing music leds. It turns on but no output from the op-amp. Thanks Vince

    ReplyDelete
  3. I am using a elcectric mike. It was a good working mike, what else could i use in place to check if i am getting a responce to the cd4017's. I can take pictures and email. ok thanks vince

    ReplyDelete
    Replies
    1. one thing I remember about that layout is that I had to put the 2 logic ICs upside down - so make sure you've done that (I'm sure you have)
      I used one of these mics http://www.openmusiclabs.com/wp/wp-content/uploads/2011/03/mic_start_small.jpg

      but if you briefly short the mic input leads that should activate it - if that works then it's probably the wrong type of mic - the right type is of course a free one ripped out of an old tape recorder

      Delete
  4. yes i put the logic IC's upside down. I had to take a closer second look. Yes i get 5 volts at pin 8. I will look and report back for the Dancing leds next. Thanks Paul. What next? Do you think i got the wrong logic transistors? Vince

    ReplyDelete
  5. TTP3055? I am goin to get another 3 pcs soon and try it again. I am not building your 9 volt battery tester tonight. I just finished your Dark flashing led. Works. no problem there. ttyl

    ReplyDelete
  6. i am now building your 9 volt battery tester. Oops not = now vince

    ReplyDelete