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Repeating Timer 5
This timer circuit operates only when the temperature exceeds a predetermined level. An alternative version, known as Repeating Timer No. 6, functions while the temperature is below this preset level. The resistor R7 is used to set the temperature threshold....
Mains Powered White LED and Grand Prix Starting Lights circuit
An array of white LEDs can serve as a small lamp for the living room. LED lamps are readily available, resembling standard halogen lamps, and can be installed in a standard 230-V light fixture. A capacitor is employed to reduce...
LED Christmas Star
This circuit can be used to construct an attractive Christmas Star. When we switch on this circuit, the brightness of lamp L1 gradually increases. When it reaches the maximum brightness level, the brightness starts decreasing gradually. And when it reaches...
Time Switch
This circuit is specifically designed for individuals who frequently need to wake up early in the morning. Standard alarms in electronic watches are often insufficiently loud.
The circuit utilizes a high-decibel audio output mechanism to ensure that the alarm is audible...
Wiring diagram for 3 way switch
This project demonstrates a visual representation of audio volume levels through the use of LEDs that illuminate in response to music. The circuit connects to the speaker output of an audio amplifier, allowing it to gauge the audio signal's intensity....
220V AC Powered White Led Lamp
The circuit provides sufficient illumination suitable for reading purposes. Capacitor CX, in conjunction with diodes D1 through D4, constitutes the AC step-down circuit. CX lowers the high voltage AC from the mains to a low voltage AC, which is subsequently...
Christmas light circuit
The chart illustrates a Christmas lights circuit that employs a simple and cost-effective CD4069 CMOS hex inverter to control four separate circuits, each consisting of 50 light-emitting diodes (LEDs), totaling 200 LEDs. The circuit is powered directly by a 220V...
Need Help: Wiring LEDs with 2 source voltages
A series of LEDs is intended to display at two brightness levels, and there is uncertainty regarding the proper wiring. This setup is for additional running lights and brake lights on a bicycle. When using the series LED calculator, it...
Timer with buzzer and optocoupler circuit
A small circuit designed for various time measurement applications. It features an audible sound signal from the buzzer BZ1 and has the capability to drive an external circuit through the optocoupler IC2, once the appropriate circuit is connected to contacts...