Hi. I am trying to control the switches on a old musical keyboard. I had planned to put a npn transistor across the switch and use the arduino to control the base through a resistor. It didn't work. The keyboard is powered by a split rail 15v supply. One side of the switch measures -15 volts the ot…

Using transistors as switches.. problems

Topic		Replies	Views
basic transistor question General Electronics	10	3429	May 6, 2021
Arduino-Controlled RC Radio Interfacing	13	5679	May 6, 2021
Using one circuit to switch another - (basic!) General Electronics	7	5480	May 6, 2021
PNP transistors as a switch controlled by arduino General Electronics	31	19816	May 6, 2021
Can any Ardiuno switch 5V circuit ? Interfacing	7	5670	May 6, 2021