AC voltage probe (CB8185E)

This circuit for voltages up to about 20 V was found in a 90s Popular Electronics. The LED can be of any type or color.

PWM with the 555 (2) (CB11854E)
This circuit is intended for PWM speed control of a motor up to 500mA with the BD136, using...
Core Independent Peripherals Now Available on PIC18 Family
PIC18F “K40” Features Intelligent ADC with Filtering and Signal Analysis Capabilities Ideal for...
Direct H Bridge Current Monitor (CB5401E)
This circuit was found in a 2005 Linear Technology application manual. The circuit monitors the...