Found in documentation from the 1980s, this circuit can generate signals between 6 and 8 MHz. The frequency can be slightly varied in the setting. FET is a general-purpose type.
This shield can be controlled by positive or negative voltages of the sensor acting as a...
This circuit is from a 1980s Signetics documentation. Equivalent operational amplifiers may be...
This circuit was found in an Electronics World of 1969. Transistors are general-purpose types. It...