Can we make timer circuit using transistor?

After some time, the voltage applied to the base of transistor becomes high enough to open the transistor. The current starts flowing through the transistor, and the LED turns on. The delay can be adjusted by changing the resistance of the variable resistor R3.

How does a transistor timer work?

The timer works on the capacitor “C” Resistor R1, R2 and emitter network, this network is arrange in such way that they provides forward bias voltage to the transistor base terminal (break over voltage). The timer duration changes by changing the values of the capacitor and resistors.

What are the 4 major components used in transistor timer?

The circuit diagram for the simple transistor timer is shown below.

• Reference Designators.
• Power Supply.
• Capacitor.
• LED.
• Resistors.
• Switch.
• Transistor.
• Insert the 470uF Electrolytic Capacitor (C1)

Can a timer be set using a transistor?

Timer set for 30 minutes using transistors. This circuit is based on learning of the discharge and charge of the C, which can be used as a timer circuit and can be applied in the off electrical appliances. The application has also put relay instead of LED can be enabled.

How to create a circuit for a timer?

To create the timer circuit for the desired time interval, simply change the value of the resistor R 1 or Capacitor C 1. We can use the different timer circuits of a different time delay to operate an alarm, a device, motors, etc. at a certain time interval. The main role in this circuit is played by the 555 Timer IC.

How does a time delay circuit work with a transistor?

When we press the switch S1. It causes LED1 is light told state ready. Then, we press S2, which is a timer switch. On press switch S2 current will flow to the C1 charge fully. Then, to discharge out through R2 to limit current. To flow to the bias for transistor Q1.

Can a relay circuit be used as a timer?

This can be used as a timer circuit and can be applied in the OFF electrical appliances. The application has also put relay instead of LED can be enabled. When we press the switch S1. It causes LED1 is light told state ready. Then, we press S2, which is a timer switch. On press switch S2 current will flow to the C1 charge fully.