|Created||November 08, 2013|
|Last modified||October 28, 2014|
|Tags||car-charger charger ham ham-radio handheld ht icom radio t90a|
This is the dc voltage regulator circuit I built for charging and running my Icom T90a handheld radio from my car.
The Icom T90a runs on 5.5V - 11.5V. In order for the charger to work, you need to supply more than the battery provides which is 7.8V. So for a good DC charger, you will need 7.9V - 11.5V. This circuit is capable of providing that from a DC source of 10.8V up to 16V+ Which is within the spec of a car's battery and alternator.
The trimmer pot is used to fine tune the output voltage. You should tune the voltage here when its under load to get it perfect.
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