Ulf - Yes, this question, about the HP 105B, was asked in September 2016. https://www.febo.com/pipermail/time-nuts/2016-September/100436.html
In Europe, it is virtually impossible (RoHS) to acquire NiCad batteries for past decade — unless you are an exempt entity. IF you desire a DIY Build, examine these three (3) popular ICs for charger management. Application Notes for these parts have typical circuits. TI BQ24401 Switch-mode NiCd/NiMH Battery Charger http://www.ti.com/product/BQ24401/technicaldocuments Maxim (old Dallas Semi) DS2715 NiMH Battery Pack Charge Controller https://www.maximintegrated.com/en/products/power/battery-management/DS2715.html Analog Devices (old Linear Tech) LTC4060 Standalone Linear NiMH/NiCd Fast Battery Charger http://www.linear.com/product/LTC4060 Jameco sells the old Linear Tech charger ICs. https://www.jameco.com/shop/keyword=Nimh-Battery-Charger-Ic === > I am looking for a modern replacement for the NiCad battery pack used in the > HP 105B. > One such 105 that I salvaged have been standing on a shelf with > the batteries "happily boiling away". > So, what kind of chemistry would be possible to use without too much > re-design of the charging circuitry? > Ulf Kylenfall, SM6GXV Sent from iPad Air _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.