This DC-DC converter was found in old RCA documentation. The circuit operates at 15 kHz. The characteristics of the transformers were not indicated.
This experimental AM radio circuit was found in a 1979 English magazine. It can be fitted with a...
This is a variation of the two previous circuits but controlling two LEDs. The brightness of the...
This circuit is the receiver for the CB13997E. The transistor can be the BC548. We also found this...