This test circuit was found in the PE Hobbyst Handbook in a 1990s edition. The circuit tests the battery under load. The load, as the battery is selected by the switch.
This circuit uses two light-activated SCRs or LASCRs, uncommon components today. The power depends on...
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...