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Build Your Own Time Delay Relay Circuit - 6V Design
Description
Upon activation via a push button, this delay relay will initiate a load after a set duration. This duration is customizable by altering the value of a resistor and/or capacitor. The circuit’s current carrying capability is determined primarily by the chosen relay.
Circuit Diagram
Components:
- C1 See Notes
- R1 See Notes
- D1 1N914 Diode
- U1 4011 CMOS NAND Gate IC
- K1 6V Relay
- S1 Normally Open Push Button Switch
- MISC Board, Wire, Socket For U1
Notes:
- Contact jawaharlal@excite.com with feedback, inquiries, and suggestions.
- The time delay can be determined using the formula R1 * C1 * 0.85 = T, where R1 represents the value of R1 in Ohms, C1 signifies the value of C1 in microfarads, and T denotes the time delay in seconds.
- S1 can be substituted with an NPN transistor to enable the circuit to be activated by computers or other circuits.
- A wide selection of 6V relays can be used for K1. If a larger relay is utilized, a transistor may need to be added to the circuit’s output to manage the greater load.
CMOS Integrated Circuits
The 4011 is a versatile CMOS NAND gate integrated circuit. This IC is commonly used in digital logic circuits and offers a compact solution for implementing various logic functions. It's constructed using complementary metal-oxide-semiconductor (CMOS) technology, known for its low power consumption and immunity to static electricity. The 4011 typically incorporates four independent NAND gates, providing flexibility in designing logic circuits. Its small size and ease of use have made it a staple in many electronic projects and applications. This IC requires a power supply of 5V to operate correctly.