Although strobe lights are the most common use of trigger transformers, other devices such as arc lamps, gas laser tubes and even the common fluorescent light employ trigger transformers, however usually in a different form, such as using an electrical ballast to provide both the high voltage spike, as well as current limiting to prevent the tube from drawing excess current.
42.
In charger circuit, I use a 22 ( 1 watt ) Ohm current limiting resistance in series with the input 5V source to get a current of 240mA . All 4 batteries are connected in series while charging . when I read the voltage of the battery, it shows 1.26V ( 1 battery ) when charged fully and 1.1V when everything was drained !.
43.
Applying 4.8V as the charging voltage across 4 AA batteries with a current limiting resistance of 22Ohms in series will charge a battery with V = 1.2V and I = 1.2 / 22 = 54mA . But he says the battery will be charged at 9mA . Could you explain ( Phil Holmes ) what it means please ? . Preceding contribs ) 09 : 21, 12 September 2009 ( UTC)
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