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Volt Meters Circuits, Page 2
Volt Meters:  #-D;     E-L;     M-Z
Last Updated on: Thursday, November 30, 2017 01:57 PM


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Eight LEDs Make A 100-Division Voltmeter -  09/22/11  EDN Design Idea   Use a counter IC to drive two sets of four LEDs. The circuit in this Design Idea makes a voltmeter that reads to 0. 99V. The idea uses a counter IC to drive two sets of four LEDs (Figure 1). Each of these two sets represents a BCD (binary-coded-decimal) value. With all of the LEDs off, the voltmeter reads 0V. With all of the LEDs on, the reading is 0. 99V. Op amp IC1A generates a predictable voltage ramp. . . .  [by Raju Baddi, Tata Institute of Fundamental Research, Pune University, Maharashtra, India]

 

Expanded Scale Battery Volt Meter -  This circuit is used to measure the voltage on a 12V (nominal) lead acid rechargeable battery system. It was specifically designed for use in solar powered systems, but is general enough that it can be used for automotive or other 12V systems. Lead acid batteries normally spend their working lifetime in the voltage range of 11-15 Volts. This meter circuit. . .  [G. Forrest Cook]

 
Expanded Scale Voltmeter -  I have a 12v batter charger I put together many years ago from bits and pieces found in the junk box. Its been a good little light duty charger, but was lacking any form of battery monitoring, so I decided to give it an upgrade with a expanded scale volt meter and amp meter. . .  [Home Power Magazine]

Expanded-scale indicator revisited -  08/08/02  EDN Design Idea   The visualization aid that a previous Design Idea   describes allows only the expansion of the upper end of the scale (Reference 1]. But what can you do if, according to your project requirements, you need to expand the middle region o. . .  [by Abel Raynus, Armatron International Inc, Melrose, MA]

 

Expanded-Scale Voltmeter Uses Just Two Parts -  01/20/94 EDN Design Idea   The expanded voltmeter doesn't require trimpots to obtain usable accuracy or require the tedious selection of Zener diodes. This circuit consists of only two parts and a5V meter. The circuit is completely linear and requires no . . .  [by DD Cantrell, North Valley Research, Los Molinos, CA]

 

Four Channel Digital Voltmeter with Display & Keyboard -  Application Note Published 27-May-05. . .  [Microchip]

 

High Impedance Voltmeter -  This circuit is designed to provide an inexpensive way to to create a High Impedance Voltmeter while making use of an inexpensive analog or digital multimeter. The circuit is specifically designed for testing phototransistors when they are used in the circuits shown at this site. It has a very high input impedance that will not "Load Down" the sensor that is being checked. . .  [from Rob Paisley's Model Train web site]

 

High-impedance voltmeter -  An ideal voltmeter has infinite input impedance, meaning that it draws zero current from the circuit under test. This way, there will be no "impact" on the circuit as the voltage is being measured. The more current a voltmeter draws from the circuit under test, the more the measured voltage will "sag" under the loading effect of the meter, like a tire-pressure gauge. . . 

 

How to Use the MAXQ2000 as a Voltmeter -  App Note 4194-- 3/24/2008 -- (app note add 5/08) . . .  [Maxim Integrated]

 

ICL7107-DigitAL LED VOLTMETER -  This digital voltmeter is ideal to use for measuring the output voltage of your DC power supply. It includes a 3. 5-digit LED display with a negative voltage indicator. It measures DC voltages from 0 to 199. 9V with a resolution of 0. 1V. . . . 

 

LB-48: Linear Brief 48 Simple Voltmeter Monitors TTL Supplies -  Application Note. . .  [National Semiconductor]

 

LED display Digital Voltmeter -  This digital voltmeter is ideal to use for measuring the output voltage of your DC power supply. It includes a 3. 5-digit LED display with a negative voltage indicator. It measures DC voltages from 0 to 199. 9V with a resolution of 0. 1V. The voltmeter is based on single ICL7107 chip and may be fitted on a small 3cm x 7cm. . . 

 

LED Voltmeter Expanded Scale (ideal for your car) -  Its Useful to see the charge voltage. This Helps in detecting a Bad Alternator before it creates a dead battery. . . .  [G.L. Chemelec, designer]

 

LED Voltmeter Expanded Scale (ideal for your car) -  Its Useful to see the charge voltage. This Helps in detecting a Bad Alternator before it creates a dead battery. . .  [G.L. Chemelec]

 

LED Voltmeters 20 & 30 LED's -  Both Can be Switched to Bar or Dot Displays. . . .  [G.L. Chemelec]

 

Logic Gates Form High-Impedance Voltmeter -  05/26/11  EDN Design Idea   Estimate voltages across high-value resistances. You can use the circuit described in this Design Idea to estimate voltages across 10- to 100-MΩ resistances. It also works for reverse-biased diodes. The common CMOS gates in Figure 1 have an input threshold voltage in which the output swings from logic zero to logic one, and vice versa. The threshold voltage depends on the supply voltage (Figure 2). . . .  [by Raju R Baddi, Tata Institute of Fundamental Research, Maharashtra, India]

 

Low Power LED Voltmeter -  This is a low power voltmeter circuit that can be used with alternative energy systems that run on 12 and 24 volt batteries. The voltmeter is an expanded scale type that indicates small voltage steps over the 10 to 16 volt range for 12 volt batteries and over the 22 to 32 volt. . .  [G. Forrest Cook]


Volt Meters Circuits, Page 2
Volt Meters:  #-D;     E-L;     M-Z


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