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    114 x 555 Timer Circuits

    Browse through a total of 114 555 timer circuits and projects including the timer’s datasheet. There are simple circuits for begginers and advanced engineers.

    555 datasheet   555 duty cycle   555 metronome   555 reset function   555 time delay relay   inverted 555 timer   pulse generator  

    Crazy Multicolor Flashing LED Globe! Nowadays, single-color and multi-color flashing LEDs are easily available, which obviates the requirement of external chips to produce fascinating lighting effects. What can we do with one piece of such a single color flashing LED, and two pieces of multicolor flashing LEDs? Here is an ultrasimple circuit of an LED Globe wired...
    Zener Diode Tester Circuit Diodes whose reverse-breakdown characteristics are controlled precisely during manufacture are called as Zener diodes and are intended specifically for operation in the reverse breakdown mode primarily as inexpensive voltage references. An uncomplicated circuit application of a ZD is the common shunt voltage regulator. If you...
    Piezo Trigger Switch Circuit Piezo Trigger Switch circuit described here is a microcontroller-compatible shock/impact sensor switch module works on 5VDC supply. The whole circuit can be assembled on a 5×7 cm common circuit board. The piezo-ceramic element (PZ1) can also be mounted on the PCB without any difficulty. The module gives a “Logic-High” (H)...
    Power Failure Alarm This minuscule power failure alarm circuit is a power supply monitoring device that will set off a piezo-speaker when the ac mains mains supply cuts off. It is very helpful to indicate the loss of power supply to some power-critical instruments such as a lifecare device installed in a hospital. Alarm activation at the right...
    Fascinating Flowervase: Sound Activated Motor Driver If you are looking for an idea to build your own simple electronic gift, your search may end here! Described is a minimalist design for you, realized using a handful of discrete components. The major component in this design (Sound Activated Motor Driver) is an inexpensive, and widely available robotic motor, which is nothing...
    High Power LED Dimmer Circuit I made this dimmer circuit because I have a cheap chinese LED lamp that doesn’t have the option to dim its light. It is a simple PWM dimmer built with the well-knows 555 integrated circuit and a power MOSFET transistor to drive the LEDs. The led lamp shown in the video is powered from a 3.7V Li-ion battery that lasts...
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