walters
Advanced Member level 2

dc variac
Who makes cheap DC variacs ?
I have wall warts but they don't have a KNOB pot that is variable voltage from 1volt to 12 volts that has a KNOB pot to set it
What can i use AFTER the wall wart output lets say is 9volts , what can i put to make it variable voltage after the wall wart ?
AC outlet-- wall wart output is 9volts ---- ?? what can i put to make it variable?
Who makes cheap DC variacs ?
I have wall warts but they don't have a KNOB pot that is variable voltage from 1volt to 12 volts that has a KNOB pot to set it
What can i use AFTER the wall wart output lets say is 9volts , what can i put to make it variable voltage after the wall wart ?
AC outlet-- wall wart output is 9volts ---- ?? what can i put to make it variable?