Power ON Delay Switch

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https://www.electronics-lab.com/power-on-delay-switch/

Power-ON Delay Switch which can be used in all applications requiring a delay during power-on from 1 to 60 seconds. Specifications Supply input 5 VDC Relay output SPDT relay Relay specification 5 A @ 250 VAC Preset adjustable range function Power-On LED indicator Screw terminal connector for easy relay output connection Four mounting holes of […]

Delay using 8051 Timer

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https://www.electronics-lab.com/delay-using-8051-timer/

The major component of this circuit is Microchip’s SST89E54RDA-40-C-PIE, which is a pin-for-pin compatible with typical 8051 microcontroller devices. It has a built-in timer used to produce accurate time delay. The light emitting diode (LED) is connected through the 330Ω resistor to indicate the time delay. The blinking LED switches ON for 1ms and switches […]