Rub the lamp and make a wish circuit

The simple LED Flasher by IC 4011 circuit

This is simply a LED flasher circuit that is suggested for construction. However, it is important to understand the use of transistors, which can be challenging when learning about digital electronics. The LED flasher circuit operates by utilizing a basic astable...

200 LEDs Christmas Lights circuit

This simple and inexpensive circuit built around a popular CMOS hex inverter IC CD4069UB offers four sequential switching outputs that may be used to control 200 LEDs (50 LEDs per channel), driven directly from mains supply. Input supply of 230V...

Touch fan speed control circuit eight stalls

The circuit depicted in Figure 3-7 utilizes a touch sensor chip in conjunction with a conductive sheet. It is designed to achieve eight different speed settings. The CC4011 timing pulse oscillator is comprised of an integrated circuit. The configuration includes...

up down led sequencer

A 10-light LED bar graph is desired, where the LEDs light up sequentially until all are lit, then cycle back down until all are off. The LM3914 - Dot/Bar Display Driver is a simpler analog solution that operates in bar...

Running LEDs

This is a doorbell circuit featuring flashing LEDs for enhanced visual appeal. The NE555 integrated circuit (IC1) functions as a clock generator, configured as an astable multivibrator with a frequency adjustable via a potentiometer (VR1). The clock pulses generated by...

LED Dimmer Lighting

A dimmer for individual LED bulbs. LEDs (light emitting diodes) are very sensitive components; exceeding their rated current or voltage can drastically reduce their lifespan from over 50,000 hours to mere microseconds. LEDs are current-driven, meaning that the intensity of...

LED Torch Uses Blocking Oscillator

This simple LED torch is powered by a two-transistor blocking oscillator that increases the voltage from a 1.5V cell. It operates based on the inherent current limit. The circuit utilizes a two-transistor configuration to create a blocking oscillator, which is a...

Key Illuminator Circuit

Used as a 10-second momentary illuminator, this circuit can be useful in other applications as well. Pressing SI charges CI, which holds Q1 on and keeps the LED lit for about 10 seconds. The circuit described functions as a momentary illuminator,...

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...