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pills reminder schematics – Circuit Schematic
pills reminder schematics
The clock of the circuit is made of a stable oscillator built around two inverters embedded into IC1 and a Watch crystal oscillating at 32. 768kHz. This frequen...
brakelight flasher pcb – Circuit Schematic
brakelight flasher pcb
This is basically a flasher circuit modified to turn on and off a bulb instead of a LED. It uses a 555 timer IC working as an astable multivibrator. The flashin...
very useful timed beeper – Circuit Schematic
very useful timed beeper
Pushing on P1 resets IC2 that start oscillating at a frequency fixed by R3 & C1. With values shown, this frequency is around 4Hz. LED D2, driven by IC1A & B, fl...
sequential timer – Circuit Schematic
sequential timer
This circuit uses a Cmos 4017 decade counter to create a sequence of four separate events. The number of events in the sequence may be increased to nine or ten....
asymmetric timer – Circuit Schematic
asymmetric timer
A simple astable timer made with the 555, the mark (on) and space (off) values may be setindependently. The timing chain consists of resistors Ra, Rb and capaci...
555 timer ic based simple servo – Circuit Schematic
555 timer ic based simple servo
Servos became valuable products for any variety of plans, like robotics, automation or only remotely controlling some thing, for example model vehicle steering....
led flasher circuit schematics – Circuit Schematic
led flasher circuit schematics
This circuit uses the TLC555CP timer I. C. to flash an LED roughly twice every second. This particular type of 555 timer will run off only 3 volts so two 1. 5 v...
4017 led pattern flasher – Circuit Schematic
4017 led pattern flasher
The circuit uses a 555 timer oscillator to supply clock pulses of a variable frequency to the 4017 decade counter. The decade counter only needs to have three o...
one second audible clock – Circuit Schematic
one second audible clock
A beep or metronome-like click and/or a visible flash, will beat the one-second time and can be useful in many applications in which some sort of time-delay cou...
relay flasher circuit – Circuit Schematic
relay flasher circuit
In this circuit the 555 Timer IC is connected as a astable multivibator and a 12 volt relay is derived through the pin 3 of the IC. The IC generates continues p...
on off relay circuit automatic – Circuit Schematic
on off relay circuit automatic
get it on and off continuously. The circuit is using a well known NE555 timer IC which is a very famous IC due to its uses in the wide variety of electronic cir...
flip flop relay – Circuit Schematic
flip flop relay
A very useful, easy and interesting project of a flip flop relay circuit using a 555 IC. The circuit will continously flip flop or on and off two relays one by ...
buzzer circuit – Circuit Schematic
buzzer circuit
This is a project of a 555 buzzer circuit. NE555 is a timer IC comes in 8 pin dip package, it performs wide variety of tasks in electronic circuits. The circuit...
bell circuit – Circuit Schematic
bell circuit
This is a project of a ding dong door bell circuit using 555 IC. In the previous article we have discussed about a simple doorbell circuit using UM66 IC which i...
555 timer circuit – Circuit Schematic
555 timer circuit
The schematic shown below is a 555 timer circuit. NE555 is a famous IC comes in 8 pin dip plastic package. There is a huge list of 555 IC circuits due to which ...
555 tester circuit – Circuit Schematic
555 tester circuit
A project of a 555 tester circuit, the circuit will start blinking LEDs when power is applied which will indicate that the IC is working correctly.....
28 led clock timer – Circuit Schematic
28 led clock timer
This is a programmable clock timer circuit that uses individual LEDs to indicate hours and minutes. 12 LEDs can be arranged in a circle to represent the 12 hour...
cmos 4017 sequential timer – Circuit Schematic
cmos 4017 sequential timer
This timer will provide a sequence of up to ten separate events. The length of each event is set independently. And the sequence will run a fixed number of time...
relay toggle circuit using a 555 timer – Circuit Schematic
relay toggle circuit using a 555 timer
This 555 timer circuit toggles a relay when a button is pressed. Pins 2 and 6, the threshold and trigger inputs, are held at 1/2 the supply voltage by the two 1...
solid state power controller – Circuit Schematic
solid state power controller
The ckt is built around two 555 timer ICs. U1 and U2. U1 is wired as a variable duty cycle oscillator with a constant time period of around 0.1 second. Duty cyc...