Very Easiest Way To Make an Audio Transmitter and Receiver

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you can watch this video in the Hindi language, 2nd Hindi channel (The Amidst)
https://youtu.be/TlqQrRdzPss
(previous video)
Is It Really Possible To Make An INVERTER With a Mobile Charger?
https://youtu.be/lq-Ae6yie7w
components Purchase Link

1= Bd139 transistor https://amzn.to/30vRLFi
2= NE555 DIP https://amzn.to/3EWTrXq
3= 22K ohm potentiometer https://amzn.to/3F1Qo0a
diagram =

https://drive.google.com/drive/folders/1ZTA3XMaUCKSBBzgR0V6t_tZUZPrW-Bw7?usp=sharing
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