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HP 67 Battery charger not working - any alternatives
04-08-2021, 05:56 AM
Post: #9
Hans Brueggemann Offline
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RE: HP 67 Battery charger not working - any alternatives
(04-07-2021 07:22 PM)AndiGer Wrote:  Maybe something like taht?
http://davidreaton.com/hp-calculators/hp...-chargers/

that circuit with the LED looks odd. seems that emitter and collector of the transistor got accidentally swapped.
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RE: HP 67 Battery charger not working - any alternatives - Hans Brueggemann - 04-08-2021 05:56 AM



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