Hi all,
I'm currently hacking an old arcade machine to work with an Arduino. It has some 24v motors that draw 0.5 amps and I want to pulse them with PWM to control their speed.
I've identified the 2 wires that control the motor - and obviously these work in either polarity to make the motor go forward or reverse. I want to just cut one of the wires, and rapidly open and close this circuit to control the speed.
My problem is that a reed relay is not fast enough, a bipolar junction transistor only allows current to flow in one direction, and an analog switch or optoisolator just cannot handle 0.5 amp load.
Does anyone have a suggestion for a bilateral, fast switch that can handle 0.5 amps and 24 volts?
Many thanks.
I'm currently hacking an old arcade machine to work with an Arduino. It has some 24v motors that draw 0.5 amps and I want to pulse them with PWM to control their speed.
I've identified the 2 wires that control the motor - and obviously these work in either polarity to make the motor go forward or reverse. I want to just cut one of the wires, and rapidly open and close this circuit to control the speed.
My problem is that a reed relay is not fast enough, a bipolar junction transistor only allows current to flow in one direction, and an analog switch or optoisolator just cannot handle 0.5 amp load.
Does anyone have a suggestion for a bilateral, fast switch that can handle 0.5 amps and 24 volts?
Many thanks.