Overvoltage and undervoltage protection circuit diagram | High and low voltage protection circuit diagram Using LM358

SHARE:

Overvoltage and undervoltage protection circuit diagram | High and low voltage protection circuit diagram Using LM358



Voltage fluctuations and power cuts adversely affect various electrical appliances such as Tv, music system, refrigerator, etc. Here is a simple and inexpensive circuit using opamp Lm358 to disconnect the equipment during high and low voltage.
We can also use LM324 to design this circuit by using only the two op amps out of the four. We can also design a high low voltage cut out using 741 op amp. In this case, we have to use two 741 ics.
You will need:
Transformer: 0-18v or 9-0-9v, 300mA or above
Resistors :
  • R1 – 10K, 1/4W
  • R2 – 50K (preset)
  • R3 – 50K (preset)
  • R4 – 33K, 1/4W
  • R5,R6 – 4.7K, 1/4W
  • R7 – 100K, 1/4W
  • R8 – 2.2K, 1/4W
  • R9 – 100K, 1/4W
Diode:
  • D1 – 6.2V, 1/2W Zener
  • D2,D3 – IN4148
  • D4 – IN4007
DB1 – Bridge Rectifier – DB107
Capacitor:
  • C1 – 470uF, 40V
  • C2 – 0.1uF, Ceramic
Led (5mm or 3mm)
  • L1 – Green
  • L2 – Yellow
  • L3 – Red
Q1 – s8050 Transistor
RY1 – 12V Relay
Ic
  • U1 – 7812
  • U2 – LM358
High and low voltages are adjusted using the Variac. High is adjusted at 260V and low is adjusted at 160V or as per your requirement. If the voltage is high, L3 will light up and if it is lower than the preset voltage, L2 will light up. In both the cases, relay will be activated to disconnect the load. Thus the appliances are protected against the voltage variation. The whole circuit can be easily assembled on a general purpose
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.
Name

Alarm circuit,4,Audio Amplifier Circuit,1,Audio Circuit,2,charger circuit,3,connection details,1,Controller circuit,3,Emergency Light Circuit,2,Indicator Circuit,9,Inverter Circuit,1,LED Circuit,5,Multivibrator Circuits,1,Power supply,1,Rectifier Circuit,1,
ltr
item
Simple Electronic Circuits: Overvoltage and undervoltage protection circuit diagram | High and low voltage protection circuit diagram Using LM358
Overvoltage and undervoltage protection circuit diagram | High and low voltage protection circuit diagram Using LM358
Overvoltage and undervoltage protection circuit diagram | High and low voltage protection circuit diagram Using LM358
https://1.bp.blogspot.com/-rbokOCB95Fs/XndwnlFutkI/AAAAAAAABnM/6iCzYG1bCHoQjzzl7qzKGB_NXob2udGgQCLcBGAsYHQ/s640/Mains-high-low-voltage-cutoff-curcuit-using-opamp-lm358.jpg
https://1.bp.blogspot.com/-rbokOCB95Fs/XndwnlFutkI/AAAAAAAABnM/6iCzYG1bCHoQjzzl7qzKGB_NXob2udGgQCLcBGAsYHQ/s72-c/Mains-high-low-voltage-cutoff-curcuit-using-opamp-lm358.jpg
Simple Electronic Circuits
https://www.kitszone.com/2019/11/overvoltage-and-undervoltage-protection.html
https://www.kitszone.com/
https://www.kitszone.com/
https://www.kitszone.com/2019/11/overvoltage-and-undervoltage-protection.html
true
4078171261878103471
UTF-8
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