old amplifier 4440ic / how to install Bluetooth device ( CircuitEffects)

 Hello friend,s 

Please subscribe now YouTube channel circuiteffects 



circuit diagram


1,-Very simple collection 


2- Low cost Bluetooth kit only 50 offline market




Thanks for watching





Comments

Popular posts from this blog

how to install pcb circuit board esp8266- ESP12E nodemcu module | esp12 complete circuit diagram

single button on off switch || toggle push button switch on off using cd4017ic | projects