I am trying to cheaply I need to vary 10VDC without shorting?
Aaron F asked:
This is for a work/hobby project. The voltage will be feeding an input on a DDC. I am building a modular test kit that provides a open/closed, 0-10K, 0-10dc or 0-5dc(I arbitrarily chose 0-10 it can be either) voltage. I tried to use a pot but it blew the fuse in my source. I’m testing with a portable signal generator. Would using a battery as the source solve the problem? If so where would you recommend to purchase. For the other variations of input signals I’m using another pot in parallel with a DPDT (on,off,on) switch that switches between the voltage input, varying resistance, and when the pot is at max R on/off binary signal. Any suggestions?
DDC is direct digital controls. http://en.wikipedia.org/wiki/Direct_Digital_Control
This is for a work/hobby project. The voltage will be feeding an input on a DDC. I am building a modular test kit that provides a open/closed, 0-10K, 0-10dc or 0-5dc(I arbitrarily chose 0-10 it can be either) voltage. I tried to use a pot but it blew the fuse in my source. I’m testing with a portable signal generator. Would using a battery as the source solve the problem? If so where would you recommend to purchase. For the other variations of input signals I’m using another pot in parallel with a DPDT (on,off,on) switch that switches between the voltage input, varying resistance, and when the pot is at max R on/off binary signal. Any suggestions?
DDC is direct digital controls. http://en.wikipedia.org/wiki/Direct_Digital_Control
I am using a portable signal generator.
Joelle
January 26th, 2010 at 3:54 pm
Terence
what is DDC?
a pot should work, unless the total resistance is too low. A 1k or 10k pot should work fine, as long as you don’t try to draw any current.
What is your source?
.