PWM Motor/Light Controllers circuit

This circuit causes an LED to blink every half second. The duration of the blinking can be modified by changing the value of capacitor C1. Additionally, up to 18 more LEDs can be connected to this circuit, allowing for a...

Fine Control Super Bright LED Pulser

The circuit utilizes two white LEDs, with the second LED connected across the emitter of the transistor and the negative ground. It requires its own limiting resistor in series, similar to R15 and D3 in the circuit diagram. If standard...

555 timer ic based simple servo

Servos are valuable components for various applications, including robotics, automation, and remote control tasks, such as steering model vehicles. They are relatively inexpensive and readily available; however, controlling them can be somewhat challenging as they require specific timing to adjust...

Pulse Width Modulators using LM339

The first example utilizes a standard op-amp oscillator circuit to produce a triangular waveform, which is then level-shifted and supplied to a comparator (e.g., LM339) to generate a PWM waveform. It is common for users to prefer using two comparators...

ALPHANUMERIC LED DISPLAY PROJECT

A tiny sandwich flag connected perpendicular to the motor spindle aids observation of how long it takes to complete one full rotation. This worked initially, as each burst from the capacitor barely moved the flag 1/4 of a rotation. As...

Dimmer circuit

A dimmer is a simple device used to reduce the brightness of incandescent lamps and to control the speed of collector motors. This concept has gained popularity due to the abundance of outdated Soviet circuits available on Lithuanian internet forums,...

white lights

The white LEDs have varying voltage and current requirements, necessitating the use of different resistors. A parts list will be provided. The design concept is similar to previous iterations, but the white LEDs are configured differently due to their dedicated...

Speed control for PCB drill

This circuit is designed for controlling the speed of DC-operated PCB drills. The core component of this circuit is the ICLM3578, an efficient integrated switching regulator suitable for such applications. The LM3578 features separate inverting and non-inverting feedback inputs (pin...

555 RC Servo Tester Circuit

A servo is an error-sensing feedback control mechanism used to correct the performance of a system. A servo motor is a DC motor equipped with a servo mechanism. A servo motor is an electromechanical device that utilizes a closed-loop control system...