How To Make Optocoupler Tester

Hi Friends In this video I going to make an Optocoupler Tester. I have tried to make this video as easy as it could be and used common components. I Hope it would be helpful.
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Circuit at 0:46
Components
1 x 8 pin IC Base s.click.aliexpress.com/e/_DDy...
1 x LED s.click.aliexpress.com/e/_Dea...
1 x PC817 Optocoupler s.click.aliexpress.com/e/_DCn...
1 x Push Button s.click.aliexpress.com/e/_dWw...
1x 100R Resistors s.click.aliexpress.com/e/_dW4...
1x 1K Resistors s.click.aliexpress.com/e/_dW4...
1 x 2 Pin Terminal Block s.click.aliexpress.com/e/_dYS...
Useful Tools
electronic tool kit s.click.aliexpress.com/e/_dXr...
Hardware tool kit s.click.aliexpress.com/e/_dSI...
Desktop oscilloscope s.click.aliexpress.com/e/_d8d...
hand held oscilloscope s.click.aliexpress.com/e/_dXj...
cordless drill + screw driver s.click.aliexpress.com/e/_d9n...
power supply s.click.aliexpress.com/e/_dVM...
soldering station s.click.aliexpress.com/e/_dXU...
Drill press s.click.aliexpress.com/e/_d6G...
3d printer www.aliexpress.com/item/33009...
CNC machine s.click.aliexpress.com/e/_d7b...
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fecebook: / kiyanis-lab-1520512291...
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[@senakanishantha643]

Good ❤

[@Ahmedpreparationseries]

Good ciecuit,,
❤

[@qadeer1685]

Good 👍😊👍👍😊💯☺️😌😃

[@godblessyou9885]

Circuit
kindly upload
🙏😔

[@KiyanisLab]

Circuit at 0:46

[@godblessyou9885]

​@@KiyanisLab
Thanks 🙏🙏🙏🙏🙏🙏👍👍👍👍👍

[@CCelik-ux8zg]

Thank's but LED connection is wrong.

[@mikebond6328]

How?

[@CCelik-ux8zg]

@@mikebond6328 The cathode end of the LED should be connected directly to the negative pole. Even if the optocoupler in the connection in the diagram is defective, the button will mislead you.