Folks,
Just wanted to share a good link with you.
http://www.hanssummers.com/electronics/misc/gates/index.htm
I was looking for a discrete implementation to make a not gate for one input, then OR it with the output of another.
rather than have to use IC's (from mouser etc) I can just use parts that I already have in my collection.
I managed to shrink the circuit from 2x IC's ($0.60) to 6 commonly used discrete components. (0.06)
Downsides/Compromises... voltage drop in diodes means that Low's will actually be 0.7V, and highs will only be 2.6V. That may be enough for some CMOS logic.
However, a voltage buffer should do the trick for that, if needed.
Please. Discuss
I'm already aware that pcb and stuffing costs may be higher. For complex circuits, I'll always reach for IC's, but for quick'n'dirty logic jobs, this may be ideal.
cheers
/R
Just wanted to share a good link with you.
http://www.hanssummers.com/electronics/misc/gates/index.htm
I was looking for a discrete implementation to make a not gate for one input, then OR it with the output of another.
rather than have to use IC's (from mouser etc) I can just use parts that I already have in my collection.
I managed to shrink the circuit from 2x IC's ($0.60) to 6 commonly used discrete components. (0.06)
Downsides/Compromises... voltage drop in diodes means that Low's will actually be 0.7V, and highs will only be 2.6V. That may be enough for some CMOS logic.
However, a voltage buffer should do the trick for that, if needed.
Please. Discuss
I'm already aware that pcb and stuffing costs may be higher. For complex circuits, I'll always reach for IC's, but for quick'n'dirty logic jobs, this may be ideal.
cheers
/R