This is a typical point scale or moving bar circuit with the LM3915. We found it in old American documentation. The operational amplifier supports an equivalent modern type.
The selected circuit was obtained in a Texas Instruments opto-electronics manual. The transistors can be...
This circuit is suggested by Texas Instruments' Linear Circuits Applications. It consists of an...
This is a typical quartz crystal oscillator for the 3.5 MHz frequency (80-meter range) used in...