fake car alarm 555 led flash schematic
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Simple Toy Organ using 555
This is a simple oscillator with multiple resistors in series. When you press any switch, the circuit starts oscillating. You can use variable resistors instead of the 1k resistors. Using variable resistors, you will be able to tune the frequency...
12v Battery Charger Circuit with Auto Cut off
This is a simple DIY charge controller schematic created in response to a request from one of the readers on our Facebook page. The primary component of this automatic battery charger circuit is a 555 timer, which compares the voltage...
LED CHASER Sequencer
All LED negatives are connected to the "COM" pad, then through a 220 Ohm resistor to ground. There is no need for additional current limiting resistors, even with supply voltages up to 16 volts.
The described circuit employs a simple yet...
555 Oscillator Tutorial (Astable Multivibrator)
Electronics tutorial about the 555 oscillator and how the 555 oscillator can be used as a 555 astable oscillator circuit to generate square wave waveforms.
The 555 timer IC is a versatile and widely used component in electronics, particularly for generating...
Fading LED blinker
The lower the voltage, the easier it would be to fit the batteries into the caboose along with the flasher circuit. The venerable LM3909 LED flasher came to mind, but when it flashed, the LED only emitted a tiny blink,...
clock
A series of digital clocks with LED outputs were developed for the Electronics in Schools Strategy (EiSS) and utilized in various courses organized by SETPOINT (now STEMPOINT) Devon & Cornwall for secondary school educators in the southwest. The initial clock...
Traffic Lights For Model Cars Or Model Railways
Children today often possess a wide array of toys available in stores. For those with a son or grandson who has a collection of toy cars, a handmade gift such as a set of traffic lights would be greatly appreciated....
Bike Light Flasher with 555
I ride my bike allot at night and sometimes I'm not sure if people can see me. This circuit will flash an incandescent light that you can purchase from Radio Shack. Adjust the VR's for your flash requirements and make...
555 Pocket digital frequency meter schematic
A circuit utilizing a standard digital quartz electronic watch, with its crystal soldered, forms a digital frequency meter as illustrated by the connected circuit. The test signal is applied to the E and F sides via components such as R6,...