FET simple mixer (CB8760E)

We found this simple mixer in a 90s Radio Electronics. The used FETs are still common. The inputs are high impedance.

Shadow Alarm with Intermittent Sound (CB25483E)
This alarm circuit was found in the July 1992 Radio Electronics magazine. The circuit uses a small...
Wien Bridge from 1 to 15 kHz (CB8034E)
Found in a Philips publication from the 1970s, this circuit uses a DO040, which is difficult to obtain...
Nicad Charger (CB4849E)
This simple nicad battery charger uses a current regulator with the LM350. This integrated circuit must be...