dannomassey
Newbie level 3
Hi All
I am new to this forum but hopoe some of you may be able to help me, thanks in advance if you can.
I need to design DC a voltage selector circuit for driving a loaded DC motor.
I need to select a range of set voltages between +10V and +32V @ ~500mA driven from a DC power supply.
My initial design was a series of voltage dividers tapped on a wafer switch, however I have run in to two problems here, loading (should have thought of that) and either current limiting in the divider cct or bleed resistor running hot.
Next I thought I could use a basic zenner clip / clamp type cct but seem to be having similar problems as I wish the non loaded side of the cct to be low current.
I didn't think this would be too difficult but its puzzling me, or am I having mental block :-?
Thanks all
I am new to this forum but hopoe some of you may be able to help me, thanks in advance if you can.
I need to design DC a voltage selector circuit for driving a loaded DC motor.
I need to select a range of set voltages between +10V and +32V @ ~500mA driven from a DC power supply.
My initial design was a series of voltage dividers tapped on a wafer switch, however I have run in to two problems here, loading (should have thought of that) and either current limiting in the divider cct or bleed resistor running hot.
Next I thought I could use a basic zenner clip / clamp type cct but seem to be having similar problems as I wish the non loaded side of the cct to be low current.
I didn't think this would be too difficult but its puzzling me, or am I having mental block :-?
Thanks all