I'd be surprised if there is much aside from a transformer and rectifier.Īnyone have a simple circuit handy that works well for this? I've seenĪ few plans online that just say to use a bridge rectifier of suitableĬapacity, but I want to be reasonably sure that this thing won't kill Not opened it up yet to see what's inside, but being an early 1970s unit Hurt the battery if left on overnight or even for a few days.

The battery is fully charged, where it will stay at a low level and not The behaviour of my old Schauer is to gradually reduces current until The charge and either switch off or go to trickle when the battery is Rectifier on the transformer secondary to more complex circuits to taper Home-brew battery charger circuits, everything from simply using a bridge Kill batteries!) Searching online I'm finding a bewildering array of The originalĮlectronics are on a small board with 7 transistors, 2 SCRs, a couple The transformer secondary is center tapped and reads about 28 volts ACĪcross the ends, 14 volts on each leg from the center. Just theĬrapulent Chinese electronics are bad so I'd like to trash that stuffĪnd turn this into an 'old school' type charger like my Schauer. Usable case, transformer, ammeter, and wires with alligator clips. Instead of throwing out the HF unit, I was thinking that it has a perfectly (InĬontrast, I have a 4 amp Schauer charger that is about 40 years old Providing the tapering charge and switch to trickle it is supposedlyĭesigned for, this 'charger' discharges and kills batteries instead. I should not have bought this thing, a 12 Volt 6 or 2 amp (switch Given the less-than-steller reviews and HF's reputation for electronics,

Cen tech battery charger parts 69368