How to test optical coupler
Testing Tool
1. Pointer device
![](https://www.amosplanet.org/wp-content/uploads/2022/12/2f528ece35fab808cfd95d948b221fd-768x1024.jpg)
2. DC Source
![](https://www.amosplanet.org/wp-content/uploads/2022/12/16706603911.png)
3. Multimeter
![](https://www.amosplanet.org/wp-content/uploads/2022/12/6a8d64ba909951cbeae843157bb4653-768x1024.jpg)
4. Soldering iron
![](https://www.amosplanet.org/wp-content/uploads/2022/12/16706607711-1.png)
optical coupler Type
8PIN like PC923, A7800
optical coupler 8pin Testing method
1) Supply 15V into 8 pin(VCC) 7PIN(gND) of PC923
You need to weld 2 wires into 7, 8 pin so that you can supply power for 7, 8 pin conveniently
2) Use Pointer Device to supply DC current almost 10mA for 2 and 3 pin of optical coupler
![](https://www.amosplanet.org/wp-content/uploads/2022/12/16706605821.png)