momentary break in power

Thread Starter

madmike

Joined Aug 11, 2010
2
Hi I am looking for a circuit that when i switch my ignition on it (12v/24v) it will momentary disrupt power to my tracking unit and then restore power to it I need a circuit with a small component count and no relays if possible has anybody got a circuit like this at all

Thanks Mike
 

Potato Pudding

Joined Jun 11, 2010
688
Do you really need it shut down or would an input power filter be enough?

If you need it shut down and it has a low power requirement then an active T filter plus 10 Volt Zener to the igniton line.



When you turn on the starter crank the transistor drops the power to your module.

The 68 ohm resistor will take some voltage all the time. If your module draws more than 10mA this is not a good solution but it might work upto about 25 mA where it would drop around 1.5 Volts.
 

Thread Starter

madmike

Joined Aug 11, 2010
2
What is the current requirement of the 12V connection to your equipment? Is there an inrush current when power is reconnected?
Hi Tim
It has a very small current consumption negligable and there is no inrush of current when switched back on

mike
 
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