How many pins are in a 555 timer circuit?
Pinout. The pinout of the 8-pin 555 timer and 14-pin 556 dual timer are shown in the following table.
How does IC pin work?
It is the Trigger pin to activate the IC’s timing cycle. It is generally low signal pin and the timer is triggered when voltage on this pin is below one third of the supply voltage. The trigger pin is connected to the Inverting input of the comparator inside the IC and accepts negative signals.
What is the function of the discharge pin?
Its only purpose is to selectively connect the pin 7 to ground. The pin 7 is usually used to discharge a timing capacitor ( some times via a resistor too).
What is pin wire?
Definition of pin wire : wire from which pins are made.
How many pins are in IC?
So, for example, with the clocking notch orienting the chip at the 12 o’clock position, the pins of a 14-pin IC are numbered 1 through 7 down the left side and 8 through 14 up the right side.
What is pin and socket?
Pin sockets are interconnected sockets for through-hole soldering into printed circuit boards (PCBs). Also called pin receptacles, pin sockets can provide a more versatile and flexible product design, and these allow for easy plugging and unplugging of components on PCBs.
What is VSS pin?
The ground reference voltage pin for NMOS, CMOS, and TTL devices, commonly the reference pin for all other device pins. VSS is normally the system ground and the term VSS is often used interchangeably with the term GND.
How to build a clock circuit with a 555 timer?
Pin numbers 1,2,3,4,5,6,7,9,10,11 are output pins.
How to make a simple dark sensor using 555 timer?
Simple LDR Circuit. Here we have explained a dark detector circuit by using 555 timer IC and a LDR (Light Dependent Resistor) which senses the light in surroundings and if it does not find the light, it triggers the IC and glows an LED attached with the circuit. In place of LED we can also use a buzzer or speaker to use it as dark detector alarm.
How to make a fire alarm circuit using 555 timer?
Fire Alarm Circuit Using IC 555 Timer IC. The Fire Alarm Circuit diagram is given below. The IC NE555 is configured as a free running oscillator at audio frequency. Check NE555 Datasheet to understand this. The transistors BC548 and BC558 drive 555 Timer IC. The output of 555 IC via Pin 3 is coupled to the base of transistor SL100.
What is a 555 timer and how does it work?
The 555 timer IC is a very cheap, popular and useful precision timing device which can act as either a simple timer to generate single pulses or long time delays, or as a relaxation oscillator producing a string of stabilised waveforms of varying duty cycles from 50 to 100%. The 555 timer chip is extremely robust and stable 8-pin device that