This amplifier with the LM1098 and LM101 by Motorola from a 1990 manual can be designed with more modern operations. The bandpass for small signals is 3.5 MHz and the power range is 250 kHz.
If the input voltage falls below 12 V the LED glows up. Other voltages can be monitored by...
This circuit is from a Poptronics, American magazine from August 2000. The circuit can be...
This NOR or NO-OR function circuit can be implemented with two or more general purpose...