Radio Circuit. - This is one of implementation of NE555 IC to build switching system. It is only need small component completed to build this electronic circuit that basically component.
The electronic design circuit of Touch ON and OFF Switch Circuit using NE555 IC is look like in Figure 1 below. Other component used like resistors, capacitors, transistor, sensor, etc.
The electronic design circuit of Touch ON and OFF Switch Circuit using NE555 IC is look like in Figure 1 below. Other component used like resistors, capacitors, transistor, sensor, etc.
Beside we will show you electronic design circuit and component parts need, we also will give you global description about this circuit. So, please enjoy to continue reading this article until finish and get more useful.
Electronic Circuit Design
Component Parts
- 1 x 555 Timer IC
- 1 x 3.3 MΩ Resistor (1/4 Watt)
- 1 x 1 MΩ Resistor (1/4 Watt)
- 1 x Bulb with holder (regular or CFL)
- 1 x 5V Relay Module (if relay module is not available, then you need the following components)
- 1 x 5V Relay
- 1 x 2N2222 NPN Transistor
- 1 x 1N4007 PN Junction Diode
- 1 x 1 KΩ Resistor (1/4 Watt)
Description
The electronic circuit design like in Figure 1 above show you touch ON/OFF switch using 555 IC. Other component need also that can supply with low voltage DC +12V and ground source to charge this IC and all system component from power supply built. With this electronic design circuit you can produce touch on/off switch that useful now.
According Electronichub blog mentioned that the design of the Touch ON and OFF Switch circuit is very simple. First, the GND, VCC and RST pins of the 555 i.e. pins 1, 8 and 4 are connected to GND and 5V respectively. Pin 2 is pulled HIGH using a 3.3 MΩ Resistor and Pin 6 is pulled LOW using a 1 MΩ Resistor.
Two touch plates are connected to pins 2 and 6 as shown in the circuit diagram. In case of the touch to ON plate, one end is connected to pin 2 and other end is connected to GND. Similarly, one end of the touch to OFF plate is connected to +5V and the other end is connected to Pin 6.
The main principle behind the project lies in the basic functionality of the pins of 555 Timer. We know that 555 Timer has 8 pins namely GND (1), Trigger (2), Output (3), Reset (4), Control Voltage (5), Threshold (6), Discharge (7) and VCC (8).
In this, Pins 2 and 6 are used in this project. Now, we see the basic working of these pins. When Pin 6 i.e. the Threshold pin is held LOW, and if Pin 2 i.e. the Trigger Pin is made LOW, the output of the 555 Timer IC will be HIGH and it stays there. This condition can be used to turn ON the appliance.
Now consider Pin 2 is pulled HIGH and if Pin 6 is made HIGH, the output of the 555 Timer IC will be LOW and it stays there. This condition can be used in our project to turn OFF the load or device.
Two touch plates are connected to pins 2 and 6 as shown in the circuit diagram. In case of the touch to ON plate, one end is connected to pin 2 and other end is connected to GND. Similarly, one end of the touch to OFF plate is connected to +5V and the other end is connected to Pin 6.
The main principle behind the project lies in the basic functionality of the pins of 555 Timer. We know that 555 Timer has 8 pins namely GND (1), Trigger (2), Output (3), Reset (4), Control Voltage (5), Threshold (6), Discharge (7) and VCC (8).
In this, Pins 2 and 6 are used in this project. Now, we see the basic working of these pins. When Pin 6 i.e. the Threshold pin is held LOW, and if Pin 2 i.e. the Trigger Pin is made LOW, the output of the 555 Timer IC will be HIGH and it stays there. This condition can be used to turn ON the appliance.
Now consider Pin 2 is pulled HIGH and if Pin 6 is made HIGH, the output of the 555 Timer IC will be LOW and it stays there. This condition can be used in our project to turn OFF the load or device.
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