NICAD_CHARGER_FOR_AUTO

Published:2009/6/29 21:35:00 Author:May | From:SeekIC

Voltage doubler provides at least 20 V from 12-V auto battery, for constant-current charging of 12-V nicads, using NE555 timer and two power transistors. Doubled voltage drives source current into three-terminal current regulator. Switching frequency of NE555 as MVBR is 1.4 kHz. Charging currentis set at 50 mA for charging ten 500-mAh nicads.-G. Hinkle, Constant-Current Battery Charger for Portable Operation, Ham Radio, April 1978, p 34-36.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Power_Supply_Circuit/Battery_Charger/NICAD_CHARGER_FOR_AUTO.html

Print this Page | Comments | Reading(3)