Description: A switched timer for intervals of 5 to 30 minutes incremented in 5-minute steps. Circuit diagram Notes: Simple to build, simple to make, nothing too complicated here. However yo... Read more
Description: These two circuits are multi-range timers offering periods of up to 24 hours and beyond. Both are essentially the same. The main difference is that when the time runs out, Versi... Read more
A resistor is an electrical device that resists the flow of electrical current. In the digital era, we can find a variety of “digital resistors” for our everyday applications. This article i... Read more
Most of us leave our battery-operated devices like mobile phones, laptops, tablets, power banks and modems plugged into a charger overnight—even though these devices, especially sm... Read more
All schools and colleges follow a timetable for their classes, providing different time slots for different subjects. In order to follow the planned timetable, a person is assigned the job o... Read more
The circuit is capable of charging 2 AA NiMH, NiCd batteries with 5 volts on the USB port of the computer installed on the LM393 Op-amp. Charge current 470mA circuit pcb drawing and detailed... Read more
Timing circuit 16f84 controller and cd4511 decoder integrated on the board 7-segment LED display indicator and buzer with sound warning can be set with 1,2,3 numbered buttons are made from t... Read more
The schmitt triggered connection of transistors can be explained briefly: If the voltage applied to the relays does not reach to zero or maximum value, the contacts will vibrate as the magne... Read more
Time-delayed circuit with UJT and thyristor (turn-on type): C starts to be filled when S is closed in the given circuit. When the voltage of C reaches 6-9 V, the UJT will suddenly switc... Read more
Functions of the elements in the circuit: Resistance R: Protects the transistor from over current when the value of the pot is zero. Pot (P): Sets the charging time of the capacito... Read more