Time Delay Relay Schematic

The first circuit energizes the relay when the temperature rises above the preset level. The second circuit energizes the relay when the temperature falls below the preset level. The two circuits are practically identical. The only difference between them...

The goal is to create a timer activated by a button press, which will light three LEDs. After each 5-minute segment, one LED should turn off. After 15 minutes, a solenoid should ring a bell once. The individual has...

Many integrated circuits possess undocumented features or capabilities. One such example is the TLC555, which can sink a 100mA load down to 1.28V at its output (pin 3). The open-drain transistor reset (pin 7) can also sink 100mA to...

The purpose of this circuit is to power a lamp or other appliance for a specified duration (30 minutes in this case) and then automatically turn it off. This feature is particularly useful for reading in bed at night,...

This circuit utilizes two CMOS ICs: a 4011 quad 2-input NAND gate and a 4020 14-stage ripple binary counter. Upon powering on, resistors R2 and capacitor C2 generate a brief reset pulse, ensuring that the output pin Q1 of...

Today, solutions are offered for a timed control relay that utilizes Normally Open (NO) and Normally Closed (NC) contacts to manage the operation of other devices, enabling or disabling them as needed. The functionality of this circuit is based...