Post by thread:[OT] Varying voltage

On Thu, 2 Apr 1998 12:32:08 -0500 Olivier Thinel <spam_OUTthinelolTakeThisOuTSERVER-2.DEALCOMP.FI> writes: >R/C low pass filter will give you a 0-5V response >then multiply your signal whit op-amp. >APEX sell high power & high-freq. op-amp. For those of us who prefer "complicated" to expensive, a discrete transistor voltage amplifier can be used to "boost" the output of a regular op-amp up to high voltage. A sample of the high-voltage output is taken with a resistor divider and applied to the op-amp for feedback. The values of the resistor divider (especially the resistor to ground) could be adjusted by the PIC to get different full-scale voltage ranges. _____________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com Or call Juno at (800) 654-JUNO [654-5866]