Tutorial at: https://www.buildcircuit.com/4in1

This is a simple 4-in-1 do-it-yourself (DIY) kit from BuildCircuit. The kit has four different circuits that can be switched on separately or together at a time using a DIP switch.

The four circuits are:

1. Dark sensor using LDR: When the light falling on the photoresistor is blocked, the LED turns on.

2. A latch circuit using NE555 timer: Press a tactile switch to turn on an LED and it remains ON until the switch is pressed again.

3. Astable circuit using NE555 timer: An LED flashes with a frequency set by the astable mode circuit.

4. A clap-switch circuit using NE555 timer: A simple sound detector or a clap switch turns on an LED.

Besides these 4 circuits, by changing the values of the resistors and capacitors, you can change the behavior of the circuits. For example, in the astable circuit, if you change the resistance values, it works as an Infrared (IR) transmitter and you can use it in remote operated switch circuits.

You get the following components with this kit package:

1. LDR- 1 pc
2. 8 pin DIP switch- 1pc
3. Electret Microphone- 1pc
4. Screw terminal- 1pc
5. Tactile switch- 1pc
6. 3mm LED- 4 pcs (color: red/white/yellow/green/blue)- Can be any color
7. 0.1uF ceramic disc capacitor- 3 pcs
8. Electrolytic capacitors- 3 pcs (1uF, 10uF and 220uF)
9. NE555 timer- 3 pcs
10. BC547(NPN transistor)- 4 pcs
11. PCB- 1pc
12. Resistors pack(click on the links for color codes ): 10K (5 pcs), 330R (5 pcs), 4.7K (2 pcs), 1K (2 pcs), 100K (2 pcs)
13. 9V battery clip- 1 piece

Package Includes: 1 x 4 in 1 DIY kit for beginners

Tutorial at: https://www.buildcircuit.com/4in1