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Old 01-01-2005, 09:18 PM   #1
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Default need help building a discharger

i'm trying to build my own discharger, but i need a little help. i've got a bunch of 1157 automotive bulbes, but i need to know how to arrange them. should they be soldered in parallel or in series? and approx. how many bulbs will i need? thanx in advance guys.
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Old 01-01-2005, 09:26 PM   #2
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The bulbs on a discharger should be soldered in parallel- connect all the positives together and all the negatives together. I think the 1157 automotive bulbs draw about 2 amps each, so, for example, if you want a 20A discharger, you will need 10 bulbs.
Hope this helps.
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Old 01-01-2005, 10:09 PM   #3
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also when making the discharge ...add a relay onto the discharger, an put resisitor on it so it will cut off at 5.4v

using a voltmeter an testing which one will let it cut off at 5.4v

so u don't have to monitor the pack ... as it will cut off b4 anything bad can happen to ur cells !!
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Old 01-01-2005, 10:16 PM   #4
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i've only got 4 cell packs to discharge, so my cut off voltage should be 3.6 volts correct? or .9 volts per cell. how do i go about putting a resistor on a standard auto relay to get it to cut off automatically?
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