Simple Time Delay Switch Using CD4011

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In this DIY, we are developing a “time delay switch” using CD4011. CD4011 is a versatile IC and utilizes a wide range of purposes. It is a “CMOS IC” that worked with the NAND logic gate. The IC utilizes to fabricate a wide range of projects. In this project, it is wired to play out a “time delay task”. A time delay switch is used to control an event based on time.

Time delay switches are provided for a deliberate delay in operating their contacts. An exceptionally short delay (a small amount of delay) would utilize a copper disk between the “armature” and moving edge assembly. For a long delay, A dashpot is utilized. A “dashpot” is a cylinder loaded up with a liquid that permits it to escape gradually; both “air-filled” and “oil-filled” dashpots utilizes.

Hardware Components

The following components are required to make Time Delay Switch Circuit

S.no	Components	Value	Qty
1.	IC	CD4011	1
2.	Switch	–	1
3.	Transistor	2N4403	1
4.	Diode	1N4007	1
5.	Relay	12V	1
6.	DC Supply	12V	1

CD4011 Pinout

For a detailed description of pinout, dimension features, and specifications download the datasheet of CD4011

Time Delay Switch Circuit

Working Explanation

Now we are discussing the construction of the simple “time delay switch” which is made by using an IC “CD4011” in detail. The circuit will enact a relay switch after a period that relies upon the estimations of resistor R1 and the capacitor C1. The button S1 is used to activate the “55 timer IC”. The relay switch is passed through a 2N4403 NPN transistor; another same transistor can likewise be utilized in the spot of that.

The working voltage of the circuit is 12V DC however it can likewise be worked with lower voltages like 5V or 6V. For working with lower voltages ensure that the relay value ought to be utilized by the working voltage.