first ever electronics project I did when I was an apprentice. i made a signal generator for simulating 0-10vdc and 4-20 ma that is the top portion with a display I added later on so I could see what I am outputting the bottom is a rough 0-500 k ohm and a fine potentiometer for simulating thermistor and sensors on equipment. I got the plans out of an old honeywell economizer manual. it was fun to put together and it's worked well

Posted by thetyshow at 2021-03-26 19:39:50 UTC