This is a simple mini project made out using a 741 operational amplifier. Here i have written down the steps to make it
Step-1: Components required
- A pcb board.
- LM741 operational amplifier with 8 pin base.
- A led.
- LM7805 voltage regulator.
- A pcb buzzer.
- A 10k ohm pot.
- 1x10k ohm resistor.
- 1x 220ohm resistor.
- TCRT 5000 IR tx-rx module.
- A 9v battery with conector.
Step 2:Circuit diagram
The breadboard connection of the project is shown below.
The pin configuration of LM741 is shown below.
The pin configuration of LM7805.
Pin config. of TCRT5000
Here in the op- amp LM7805 the +Vcc is connected to pin 7 GND to pin4 and the other connections are done as shown in the breadboard.
This simple project can be used as a doorbell or if someone stands in front of the main door of your house then this device can be used as an alarm.
I suggest the beginners to give a try on this project and you can get a lot of knowledge about an op-amp,how a IR rx-tx pair works.
Hope you guys have fun 🙂