This 4A (max 30V) active load is made with Daves in mind.
I have shown a 2A version here before - but it really didnt live up to my needs.
So here is my 4A version:
Question is : 2 Logic ICs....would you use a cheap Microcontroller instead ?
(Then you could use something else than RV1 and RV2 to make the control voltage : PWM and simpel RC filter. And the user could use a cheap Rotating encoder to dial it in. Instead of 2 voltmeters a cheap 2x16 character LCD display could be used!)
The Active Load has only been simulated in Labcenter Proteus ISIS 7.....so maybe it will blow up in my face when i build it ?