[sdiy] Okay, I give up :-)

[Nicolai Czempin]

Nicolai Czempin wrote:

> Okay, I'll build the 4069 circuit. I cannot hold out any longer.
>
Done. Of course, having used a breadboard, I wasn't able to thermally 
couple anything. But I guess once I have it working, I can do all that 
on one of these other boards, or even practice going through the process 
of getting a PCB made.
Oh, and BTW, it's not working. For some reason I bought (a) 22nF 
capacitor(s) instead of 2.2, even though I had copied the parts list 
from the schematics properly.
Ah well, guess I'll have to wait until tomorrow.

And another BTW, it really is simple once you leave out the PWM bit. I'm 
even beginning to understand what's happening (except for all that part 
with the source sink; I couldn't explain why the 
temperature-compensation works to someone else). If you leave out that 
sink and replace the inverters by op-amps, you'll get what I'd have got 
in my next steps with a simple 741 (more or less).