Stroboscope circuit | Next Electronics

508A microcontroller can deliver a maximum of 25mA

A typical device that requires less than 5v and draws less than 25mA is an LED. A LED must be supplied with an exact voltage for it to operate correctly. Because it requires LESS than 5v, a dropper resistor (current...

LED Flasher Schematic

Here is the new flasher circuit schematic. It consists of a 555 timer circuit and a power transistor. The power transistor is likely over-specified, as it is rated at 10A, but it is the component that was available. The values...

Economical Desk Lamp For Camping

This LED lamp was originally designed for use on a budget solar-charged 12V electrical system. It is bright enough for comfortable reading at night and features constant LED brightness with diminishing battery voltage. The circuit uses six high-brightness white LEDs...

Rotating LED Marquee Hat circuit

Here is the schematic for the circuit. Solder all the components onto a perfboard. The drawings may not be very clear. Essentially, the 555 timer generates a pulse. The circuit utilizes a 555 timer IC configured in astable mode, which allows...

Two-LED Pilot Light

This circuit was designed on request and can be useful to those wishing to have, say, a red LED illuminated when an appliance is on and a green LED illuminated when the same appliance is off. Any mains operated appliance...

Motion sensing LED Quantum Bits

The circuit operates as follows: The LED is typically powered at a low brightness through resistors R1 and R3. SW1 functions as a spring and wire-based accelerometer. When SW1 is activated, capacitor C2 charges rapidly at a rate determined by...

Knightrider lights for model carss

This simple circuit drives six LEDs in a "Knightrider scanner mode." Power consumption primarily depends on the type of LEDs used, particularly when employing a 7555 (555 CMOS version). The circuit operates by sequentially illuminating the LEDs to create a visual...

LED flashing with 3909 IC circuit

This project uses a 3909 IC and a few other parts; power is 1.5 volts DC. The project employs the 3909 integrated circuit (IC), which is a versatile component commonly used in various electronic applications, particularly in timer and oscillator configurations....

VU Meter 3

A very simple circuit for indicating levels, utilizing 10 LEDs. The circuit employs a precision half-wave rectification around the IC2, with a gain of one. The switch S1 allows for the selection of which LED to indicate. The input level...