Team Error 36

Remote control switch,using 555 timer IC , with ir sensor.

Line Following Robot,

How to connect relay with IR sensor in 3.7v battary

Lesser Security door

Buzzer
2.2k resistance
LED
BC547
LDR
3.7 Volt

Security alarms system

1/ Transistor B547
2/2.2ohm Resistance
3/ Bazaar
4/lesser Light
5/LDR
6/3.7v battary
7/wair

How connect Relay with IR sensor

1/ IR sensor
2/ 5v Relay
3/Battary
4/ LED

DIY smart dustbin 🥡

* Ultrasonic module
*Servo motor
*Arduino uno R3

All invention of great Soccer bot in Bangladesh