V
V8TR4
- Jan 1, 1970
- 0
Hello everyone,
I need to make a Power supply that mimicks a 0-10vdc out that is common on
industrial equipment outputs like chart recorders and stuff. I need very
little current, not more then 100ma ever, and 10ma is probably what is the
norm.
I have built one using an LM317 that then outputs to a voltage devider. The
problem was it doesn't get down to low volatge, much less zero.
Is there a slicker and not very complicated PS design out there to do what I
want? I was considering using a 555 as a PWM and then using a 2n2222 to vary
a voltage source. Any comments or ideas would be much appreicated. I have
just started playing around with op-amps and it seems at first glance that
these could be used to do what I want as well. Not sure of the details yet
but think it can be done.
This unit is for testing some instruments I have and is not for commercial
use.
Thanks,
Oliver
I need to make a Power supply that mimicks a 0-10vdc out that is common on
industrial equipment outputs like chart recorders and stuff. I need very
little current, not more then 100ma ever, and 10ma is probably what is the
norm.
I have built one using an LM317 that then outputs to a voltage devider. The
problem was it doesn't get down to low volatge, much less zero.
Is there a slicker and not very complicated PS design out there to do what I
want? I was considering using a 555 as a PWM and then using a 2n2222 to vary
a voltage source. Any comments or ideas would be much appreicated. I have
just started playing around with op-amps and it seems at first glance that
these could be used to do what I want as well. Not sure of the details yet
but think it can be done.
This unit is for testing some instruments I have and is not for commercial
use.
Thanks,
Oliver