Under Voltage and Over Voltage Monitor for 5V

  • Rajkumar Sharma
  • 30 Views
  • easy
  • Tested
  • SKU: EL124986
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This project is built using MC33161 IC, which is a universal voltage monitor intended to be used in a wide variety of voltage sensing applications. The project offers an economical solution for positive and negative voltage detection. The circuit consists of two comparator channels each with hysteresis, a unique Mode Select Input for channel programming, a pinned out 2.54 V reference, and two open collector outputs installed with LED for visual alert for under-voltage and over-voltage situations. The project is configured for a 5V supply by default. It provides a visual indication when supply is lower the 5V and over 5V. Yellow LED indicates undervoltage and Red LED indicates overvoltage. Trimmer potentiometers PR1 and PR2 were provided to adjust the Undervoltage and Overvoltage range. Both inputs can be used as independent or combined (Single Input)

Note: The board is configured to detect Undervoltage and Overvoltage for 5V Supply, however, it provides the user with multiple choices and extensive flexibility for different applications circuits and configurations. It may be used in many combinations for various options, refer to the datasheet of the chip for various options, following components R7, R9, R10, Jumper J2, Buzzer BZ1-BZ2 provided to implement various circuits.

Connections

  • D1 Power LED – Green
  • D2 Under Voltage Alert LED – Yellow
  • D3 Over Voltage Alert LED – RED
  • CN2 Pin1 VCC, Pin2 Output 1, Pin 3 Output 2, Pin 4 GND
  • Jumper J1 Single or Independent Input Selection (Dual)
  • CN1: Pin 1 = VCC, Pin 2 = Optional, Pin 3= Input 1, Pin 4 = GND, Pin 5 = Input 2, Pin 6 = GND
  • PR1 Trimmer Potentiometer – Under Voltage Range Adjust
  • PR2 Trimmer Potentiometer – Over Voltage Range Adjust

Testing the Circuit

Close Jumper J1, Connect the 5V DC power supply to CN1 Pin1 +VC and Pin6 GND. Set the Adjustable power supply to 4.5V DC and connect it to Pin 3 or Pin5 of the CN1 Connector.  Turn the PR1 trimmer potentiometer carefully so the Yellow LED glows, now set the adjustable power supply to output 5.5V and turn the trimmer potentiometer PR2 such Red LED D3 should glow. Now, the project is configured and ready to be used. It is set to detect and indicate undervoltage of 4.5V and Over voltage of 5.5V. Connector CN2 can help for microcontroller interface, Output 1 and Output 2 Normally goes High or low when under/over voltage conditions are detected.

Features

  • Power Supply 5V DC (Range 5 to 12V DC)
  • Yellow LED for Under Voltage detection
  • Configured for 5V Detection
  • Red LED for Overvoltage Detection
  • Provides Visual Alerts when Under-Over Voltage is Detected at input 1 and Input 2
  • Output 1 and Output 2 for Micro-Controller Interface
  • LEDs can be Replaced with Audible Buzzer (Low Current Buzzer 10mA maximum)
  • 4 X 2.5 MM Mounting Holes
  • PCB Dimensions 53.66 x 24.92mm

Schematic

Parts List

NO.QNTY.REF.DESC.MANUFACTURERSUPPLIERPART NO
18BZ1,J2,BZ2,R3,R5,R7,R9,R10DNPDO NOT INSTALL
21CN16 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY732-5319-ND
31CN24 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY732-5317-ND
41C10.1uF/50V SMD SIZE 0805YAGEO/MURATADIGIKEY
51C210uF/16V SMD SIZE 1210 CERAMIC OR TANTLUMMANUFACTURERDIGIKEY
61D13MM LED GREENAMERICAN OCTODIGIKEY2460-L314GT-ND
71D23MM LED YELLOWAMERICAN OCTODIGIKEY2460-L314YD-ND
81D33MM LED REDAMERICAN OCTODIGIKEY2460-L314HD-ND
91J12 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY732-5315-ND
102PR1,PR25K TRIMMER POTENTIOMETERBOURNSDIGIKEY3362H-502LF-ND
113R1,R2,R4470E 5% SMD SIZE 0805YAGEO/MURATADIGIKEY
122R6,R810K 1% SMD SIZE 0805YAGEO/MURATADIGIKEY
131U1MC33161 DIP8 or MSOP8ONSEMIDIGIKEYMC33161DMR2GOSCT-ND
141J1/SHUNTSHUNTSULLINS CONCTDIGIKEYS9001-ND

Connections



Gerber View

Photos

Video

MC33161 Datasheet

MC34161-D

PCB

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