12v to 5v reducer

[jtm311]

Shep would you use the Diode so you do not get a bounce back of voltage?

John

[shep]

Shep would you use the Diode so you do not get a bounce back of voltage?

John

A zener circuit is very simple and the heat is disapated in the resistor instead of in the device. Typicaly a half or 1 watt resistor will work if the input voltage and current draw is with in the circuit spec. I used to know the formula to figure all this but haven't done it in about 7 years. You can get resistors that are built in a heatsink if needed. The link I posted has a circuit in it designed for 60 mili amps. A little googleing will come up with a correct circuit design if you can figure the current draw of the vss. Since the heat is disapated in the resistor the circuit should last virtualy for ever provided the resistor is sized appropriately

[jtm311]

A zener circuit is very simple and the heat is disapated in the resistor instead of in the device. Typicaly a half or 1 watt resistor will work if the input voltage and current draw is with in the circuit spec. I used to know the formula to figure all this but haven't done it in about 7 years. You can get resistors that are built in a heatsink if needed. The link I posted has a circuit in it designed for 60 mili amps. A little googleing will come up with a correct circuit design if you can figure the current draw of the vss. Since the heat is disapated in the resistor the circuit should last virtualy for ever provided the resistor is sized appropriately

Thank You I'm in the same boat I knew this stuff many years ago..
John