Simple use a 2.25 ohm 25watt ballast resistor;Renault used them to drop the voltage for the Engine control computers.
12v dc to 3v dc
7K ohm
12V, 5V
DC 12V power supply can convert 110/220V AC power source to 12V DC.
AC or DC? AC - use a transformer, DC - forget it - not simple or cheap.
AC or DC? AC - use a transformer, DC - forget it - not simple or cheap.
if you have 12v dc then you can use a 4 ohm resistor
input voltage is strictly according to applications. If use 12V dc adapter power 5V dc device, the 5v dc device would be damaged.
+12V, -12V, +5V, -5V, +3.3V +12V, -12V, +5V, -5V, +3.3V
One invert the function or a signal. the other is a pulse width modulator controller which are usually used to convert one source of power to another. As in 12v dc in 5v dc out or vice versa
+12V, -12V, +5V, -5V, +3.3V
12v, 3.3v 5v