555 timer light dimmer schematic
#555 timer
#light dimmer
#PWM
#LED control
#duty cycle
#analog control
#circuit schematic
#electronic dimmer
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555-based solar engine
Wilf Rigter simplified this circuit a bit, made it phototropic, and doubled it up to yield a photopopper design in a post later the same day. I’ve got this design written up elsewhere in the library.
The circuit described is a...
Integrator multiplies 555 delay
Long delay times can be derived from a 555 timer with reasonably sized capacitors if an integrator circuit is used. The capacitor's charging time with an integrator circuit can be much longer than with a conventional 555-timer configuration.
The 555 timer...
555 car alarm circuit diagram
The circuit presented is a 555 timer-based alarm system for vehicles, which primarily consists of a 555 timer and a quad 2-input NAND gate configuration. It is designed to produce a long beep sound when oil pressure is low and...
555 timer IC audio amplifier circuit schematics
This document discusses a simple project utilizing the 555 timer IC. The 555 timer IC can be configured as an audio amplifier using an astable multivibrator configuration. It performs pulse width modulation (PWM) on an audio signal. The current capacity...
A New Solar / Wind Charge Controller Based on the 555 Chip
The prototype was successfully assembled on a breadboard and subsequently built on a piece of Radio Shack protoboard for field use. The assembly process took only a couple of hours, and it functioned correctly on the first attempt. This more...
Motor speed controller
During summer nights, the temperature is initially quite high. As time passes, the temperature starts dropping. Also, after a person falls asleep, the metabolic rate of one's body decreases. Thus, initially the fan/cooler needs to be run at full speed....
Capacitance meter with 555
The tool is based on a NE555 (or LM555) timer i.c., wired as an astable multivibrator. The frequency of the multivibrator is determined by the value of the unknown capacitor Cx. The circuit can be fed by a small battery....
12V battery charger with 555
The charger consists of two stages: The first is a capacitive voltage doubler, which uses a 555 timer IC driving a pair of transistors connected as emitter followers, which in turn drive the voltage doubler proper. The doubler has power...
555 toilet floodlight and ventilator automatic control circuit
The electronic switch consists of the CK-4 type magnetic control switch and the components VT1, R1, and R2. When the bathroom door is closed, the permanent magnet ZT and the reed switch GA come into proximity, which separates the two...