
This post describes how to use a 4007 Diode as a Light Detecting Sensor. The ceramic part on the top of the diode used in this has been removed as shown in the picture below.
Table of Contents
Diode Convert To sensor :

Sensor Circuit Diagram :
i designed circuit diagram from easyeda site

Components Required :
- BC547 Transistor – 2no
- 1N4007 Diode – 1
- 1M Resistor – 1
- 3v LED – 1
Tools Needed :
- Soldering Iron
- Soldering Iron Stand
- Components Holding Stand
- Cutter
- Required Wire