This low power circuit was obtained from an American 80's documentation. The circuit indicates the voltage of a battery being trimmed by the trigger point. The transistors can be the BC549.
This circuit, found on Motorola's Linear Interface ICs uses the MC1536 as a driver for a 36 W or...
This circuit was obtained in a 1977 Radio Handbook. The transistor is from the era and the coils...
We found this HV generator circuit in a 1967 publication. It can be fitted with SCR TIC106 and the...