This circuit was found in the March 1992 issue of Radio Electronics magazine. The circuit has several adjustments and uses an operational amplifier. Note the supply voltage.
This circuit was found in a Motorola documentation from the 90s. The circuit uses a PUT, an...
This circuit was found in many record players with crystal phono pickups. The output power is 800...
This circuit converts a resistance in the range between 1 k ohm and 1 MΩ to a signal in a...