We found this circuit in a 1998 publication. The circuit has controls for both frequency and signal strength. A lamp is used to monitor the signals. The supply is made with a voltage of 12 V.
This circuit is intended to maintain constant current in a heating element. This element must have...
The circuit, shown in the figure, is suggested by Texas Instruments, making use of one. Frequency is...
This simple light meter or photometer circuit uses an analog indicator of 0-1 mA. Power is...