I'm trying to install a replacement motor that needs 9V, but the original motor was 12V.
I narrowed my options down to some silicon diodes in series to drop it 3V, or just use a 7809. I went with the latter since it would give a more stable voltage and won't get it very hot, since the motor doesn't seem to need much power. Without any resistance, the motor only draws 5mA but if I pinch the shaft pretty hard it jumps to 40 or 50.
Does this seem like overkill? Would a simple resistor of proper wattage be enough since the motor isn't a very dynamic load, or would it be too inefficient?
I narrowed my options down to some silicon diodes in series to drop it 3V, or just use a 7809. I went with the latter since it would give a more stable voltage and won't get it very hot, since the motor doesn't seem to need much power. Without any resistance, the motor only draws 5mA but if I pinch the shaft pretty hard it jumps to 40 or 50.
Does this seem like overkill? Would a simple resistor of proper wattage be enough since the motor isn't a very dynamic load, or would it be too inefficient?