5 Minutes Timer Circuit To Turn Off Electrical Devices


5 Minutes timer circuit using ic 555 | 555 timer projects | 555 timer applications

5 Minutes Timer Circuit To Turn OFF Electrical Devices

A timer circuit is used to generate an output pulse after a given period of time. This time can be in the order of seconds or minutes. The length of the output pulse can be varied by changing the frequency at which the clock signal is applied to the timer's input pin.

Time interval can be measured in seconds, minutes, hours, days or weeks. Timer circuits are used in various applications such as controlling ovens and gas stoves or any electrical devices. It is also used in to control the period of time for which lights turn on or off.

Parts Required:

Resistors: (1/4w)
R1 - 4.7K
R2 - 270K
R3 - 10K
R4 - 4.7K
R5 - 1.2K

C1 - 470uF, 35V
C2 - 1000uF, 25V

U1 - 7812
U2 - NE555

DB1 - DB107 Bridge Rectifier
Transformer : 0-15v or 0-18v, 350mA or 500mA
RY1 - 12V relay (Ampere based on your requirement)
D1 - IN4007
Q1 - 2N2222 NPN transistor
S1 - Momentary Switch (NO)

L1 - Red
L2 - Green

General Purpose PCB

This is a basic timer circuit designed using the popular timer Ic 555. Voltage from a stepdown transformer is converted to DC using bridge rectifier DB1 and is fed to the voltage regulator Ic to get a 12v regulated power supply.
555 timer IC  is wired as a monostable multivibrator and the timing is calculated by the following formula:
T = 1.1RC
The component values used here to generate approximately 5 minutes. Once the preset time is reached, it will automatically turns off the device. Again, in order to turn on the device, we have to press the momentary switch S1.
L1 is used here to indicate the power to the unit whereas L2 is used here to denote the electrical device connected to the mains supply through the relay is ON.


Laptop Repair Made Easy
Laptop Repair Made Easy
Amazon Affiliate Disclaimer:The owner of this website(kitszone.com) is a participant in the Amazon India Associates Programme, an affiliate advertising programme designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.in.

Alarm circuit,6,Audio Amplifier Circuit,1,Audio Circuit,2,charger circuit,3,connection details,1,Controller circuit,6,Emergency Light Circuit,2,Indicator Circuit,12,Inverter Circuit,1,LED Circuit,5,Multivibrator Circuits,1,Power supply,1,Rectifier Circuit,1,timer circuit,1,
Simple Electronic Circuits: 5 Minutes Timer Circuit To Turn Off Electrical Devices
5 Minutes Timer Circuit To Turn Off Electrical Devices
5 Minutes timer circuit using ic 555 | 555 timer projects | 555 timer applications
Simple Electronic Circuits
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share to a social network STEP 2: Click the link on your social network Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy Table of Content