The go-no-go probe.
Kit Includes:
1 – Audio Buzzer
2 – Three volt Batteries
2 – Battery Holders
2 – 0.1 µF Capacitors
1 – 1.0 µF Capacitor
1 – Bi-Color LED
1 – PIC16F19155 (Programmed)
1 – Current & Power Monitor
1 – Current Sense Amplifiers
1 – 3" #12 Wire
1 – .1 ohm Resistor
1 – 1K ohm Resistor
1 – 220 ohm Resistor
1 – Reed Relay
1 – Tactile Switches Thru Hole
1 – 10" #24-22 Stranded Wire
1 – 10" Wire Wrap
1 – PCB
For complete details, read the article.