Found in old documentation, this circuit can use modern equivalent components. The signal has good strength thanks to the use of a power transistor. The Q1 transistor is a unijunction of the time.
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...