🚀 go-pugleaf

Can someone help me with this?

I have a circuit that that consists of a 12 volt battery
charger (500ma) and an electro magnet. All I want to do
is have the circuit power on for about 1 second and then
shut off for about 1 second and continue in this manner
for hours at a time. It doesn't matter to me if the cycling
is accomplished by interupting power to the charger or by
interupting power from the charger, as long as I can get
my electro magnet to cycle on, off - on, off - on, off, etc..
I first thought I could use an automobile turn signal flasher
but found out that current always flows through the flasher
so the magnet never shuts all the way down. I need the power to
drop completely out between pulses. I have found some things in
electronics catalogs that would work (recycle timers) but the 
cheapest one is about $25.00! Shouldn't I be able to make something
for about $5.00? Of course, adjustable times and a LED that shows
when power is on the magnet would be nice, but I really just need
the thing to turn on and off ad infinitum.

Any advice will be greatly appreciated...


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Ken Gantz ..........kgantz@cup.portal.com
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