Digital Voltmeter
2009
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 3 DC 50V Blue LCD Digital Volt Panel Meter Voltmeter $13.99 Time Remaining: 14d 1h 11m Buy It Now for only: $13.99 |
 Newport Digital Panel Volt Meter 2584 BL NIB 5415 $49.99 Time Remaining: 5d 10h 12m |
 3 DC 500v Blue LCD Digital Volt Panel Meter Voltmeter $24.99 Time Remaining: 13d 23h 41m Buy It Now for only: $24.99 |
 3 DC 250v Blue LCD Digital Volt Panel Meter Voltmeter $24.99 Time Remaining: 14d 2h 41m Buy It Now for only: $24.99 |
 3 DC 30V Blue LCD Digital Volt Panel Meter Voltmeter $13.99 Time Remaining: 14d 41m Buy It Now for only: $13.99 |
 3 AC 200v Blue LCD Digital Volt Panel Meter Voltmeter $16.99 Time Remaining: 18d 3h 12m Buy It Now for only: $16.99 |
 3 DC 300v Blue LCD Digital Volt Panel Meter Voltmeter $24.99 Time Remaining: 14d 3h 41m Buy It Now for only: $24.99 |
 3 DC 700v Blue LCD Digital Volt Panel Meter Voltmeter $24.99 Time Remaining: 13d 23h 43m Buy It Now for only: $24.99 |
 Digital Voltmeter AC 75V to 300V Meter Voltage RED LED Panel $6.99 Time Remaining: 17d 23h 11m Buy It Now for only: $6.99 |
 3 DC 100v Blue LCD Digital Volt Panel Meter Voltmeter $24.99 Time Remaining: 14d 1h 41m Buy It Now for only: $24.99 |
 3 DC 2V Blue LCD Digital Volt Panel Meter Voltmeter $13.99 Time Remaining: 13d 23h 10m Buy It Now for only: $13.99 |
 3 DC 150v Blue LCD Digital Volt Panel Meter Voltmeter $15.99 Time Remaining: 14d 2h 12m Buy It Now for only: $15.99 |
 Newport 205 A Digital DC Volt Meter 2 20 200 Volts 3 64DIN Panel $19.99 Time Remaining: 14h 42m Buy It Now for only: $19.99 |
 LCD Digital Testing Multimeter Voltmeter Ammeter DT830B $15.00 Time Remaining: 11d 13h 5m Buy It Now for only: $15.00 |
 NEWPORT 2000BS 3 A3 DIGITAL VOLT METER USED TAKEOUT $59.95 Time Remaining: 19d 14h 33m Buy It Now for only: $59.95 |
 XIELI DPM MB3103 DIGITAL DC VOLTMETER 35 DIGIT $94.99 Time Remaining: 8d 16h 28m Buy It Now for only: $94.99 |
 200V 200A RED LED DIGITAL BATTERY SOLAR PANEL METER AMMETER AMP METER VOLTMETER $22.90 Time Remaining: 26d 16h 29m Buy It Now for only: $22.90 |
 Simpson Digital Voltmeter 2865 24501 $52.00 Time Remaining: 5d 23h 21m Buy It Now for only: $52.00 |
 Toky DM3A DV02 Digital Panel Ammeter Voltmeter 1999mV 3 1 2 Digit LED Display $78.99 Time Remaining: 23d 6h 41m Buy It Now for only: $78.99 |
 NEWPORT 2000BS 2 A3 D2 DIGITAL PANEL VOLTMETER NEW $89.99 Time Remaining: 3d 11h 12m Buy It Now for only: $89.99 |
 NEWPORT ELECTRONICSINC 2000AS 2 DIGITAL VOLT METER NIB $50.50 Time Remaining: 8d 11h 15m Buy It Now for only: $50.50 |
 Red Lion Controls Digital Panel Voltmeter APLVD400 $69.99 Time Remaining: 24d 21h 34m Buy It Now for only: $69.99 |
 NEWPORT ELECTRONICS 400PS DIGITAL PANEL VOLTMETER XLNT $99.00 Time Remaining: 11h 38m Buy It Now for only: $99.00 |
 NOS LINCOLN ELECTRIC DIGITAL VOLTMETER PC BOARD M14490 1 M144901 $44.95 Time Remaining: 11d 11h 50m Buy It Now for only: $44.95 |
 Red Lion APLIA400 AC current voltmeter digital display $80.00 Time Remaining: 12d 19h 24m Buy It Now for only: $80.00 |
 200V 200A DC DIGITAL BATTERY PANEL METER AMMETER AMP METER + VOLTMETER + SHUNT $32.99 Time Remaining: 27d 19h 32m Buy It Now for only: $32.99 |
 Schneider Digital Voltmeter Part 50836 New In Box $242.00 Time Remaining: 7d 3h 45m Buy It Now for only: $242.00 |
 Schneider Digital Voltmeter Part 50832 New In Box $242.00 Time Remaining: 7d 3h 47m Buy It Now for only: $242.00 |
 Simpson Digital Voltmeter 2865 24501 $50.00 Time Remaining: 9d 22h 56m Buy It Now for only: $50.00 |
 NEWPORT Q2000A QUANTA 3 1 2 DIGITA DC VOLTMETER AMMETER TRANSMITTER DIGITAL M $115.05 Time Remaining: 5d 19h 40m Buy It Now for only: $115.05 |
 ABB VLM D3 Rail mounted Digital readout Panel Voltmeter 0 to 600 VAC $124.99 Time Remaining: 7d 17h 38m Buy It Now for only: $124.99 |
 Digitec 2770A 02 Digital Volt Meter $59.99 Time Remaining: 7d 13h 47m Buy It Now for only: $59.99 |
 ALLEN BRADLEY DISPLAY OUTPUT DIGITAL VOLTMETER NEW SURPLUS $149.00 Time Remaining: 6d 9h 45m Buy It Now for only: $149.00 |
 NEWPORT 2000BS 2 DIGITAL VOLT METER USED TAKEOUT $59.95 Time Remaining: 24d 13h Buy It Now for only: $59.95 |
 NEW NEWPORT 21001A 4 DIGITAL VOLTMETER 115VAC $79.95 Time Remaining: 26d 21h 55m Buy It Now for only: $79.95 |
 NEWPORT 2003B 5 NEW DIGITAL VOLTMETER 2003B5 $275.00 Time Remaining: 22d 13h 11m Buy It Now for only: $275.00 |
 SIMPSON MODEL 3865 24500 DIGITAL VOLTMETER NIB $199.99 Time Remaining: 7d 9h 57m Buy It Now for only: $199.99 |
 NEWPORT 2000BS 2 A2D2 DIGITAL PANEL VOLTMETER $249.99 Time Remaining: 26d 17h 6m Buy It Now for only: $249.99 |
 NEWPORT DIGITAL PANEL VOLT METER 2000BS 2 NEW $150.00 Time Remaining: 3d 13h 7m Buy It Now for only: $150.00 |
 Newport Digital Display Mod 205A 3 1 2 Voltmeter NIB $75.00 Time Remaining: 8d 14h 46m Buy It Now for only: $75.00 |
 NEWPORT 2002B P Digital Panel Meter Voltmeter $70.00 Time Remaining: 4d 5h 36m Buy It Now for only: $70.00 |
 NEWPORT ELECTRONICS 2003B 2 DIGITAL VOLTMETER 115 VOLT $199.99 Time Remaining: 19d 14h 5m Buy It Now for only: $199.99 |
 NEWPORT 201A 3 Digital Panel Meter Voltmeter $45.00 Time Remaining: 4d 5h 38m Buy It Now for only: $45.00 |
 NES Weschler Slimline Digital DC Voltmeter IDV 7222 $247.65 Time Remaining: 10d 19h 35m Buy It Now for only: $247.65 |
 NES Weschler Slimline Digital DC Voltmeter IDV 7805 $193.00 Time Remaining: 10d 19h 35m Buy It Now for only: $193.00 |
 NES Weschler Slimline Digital DC Voltmeter IPM 7209 $247.65 Time Remaining: 10d 19h 35m Buy It Now for only: $247.65 |
 Dana 4800 Programmable Digital Volt Meter Rack Size 1 Volts to 100V AC or DC $249.95 Time Remaining: 16d 15h 35m Buy It Now for only: $249.95 |
Digital Voltmeter
Anyone can design a simple circuit of Digital Voltmeter for me?
Got the Digital Voltmeter circuit that other than these website?
http://www.electronics-lab.com/projects/test/007/index.html
http://www.electronics-lab.com/projects/test/014/index.html
Thank!
The circuit presented is as simple as a working circuit can get.
Everything is based on the AD converter chip. It is the big rectangle with all the leads running from it. What an AD converter does is compare an input voltage to a reference voltage and then generate a digital output. "AD" stands for "Analog to Digital". What is especially nice about the chip presented is that it hooks directly to the LED's. These are the light emiting diodes which form the numbers seen in the display. A good illustration of what they look like is seen in the second web link. In the schematic, they are the squares with the "8's" inside them.
I realize the circuit is somewhat intimidating, but what one can't see is all the circuitry embedded in the AD chip. It probably contains thousands of transistors and building this circuit from scratch would involve quite a lot of space, not to mention what it would cost to pruchase a thousand individual transistors. Then there would be the problem involved in hooking everything up correctly. Debugging an electronic circuit is much more difficult than debugging computer programs. Because of all these reasons, electrical engineers rely heavily on IC (Integrated Circuit) chips like the AD presented.
Hooking up the AD is mearly a matter of getting a few resistors for the voltage comparitor, a few capaciators and the LED's for the display. Some sort of power is going to be required, but most small circuits can run off 9 volt batteries. The only critical things are establishing a precise reference voltage. An adjustment is very handy and this circuit will be used to "zero" the voltmeter. The entire circuit appeared to be some sort of electronics kit. If it is, then assembling it ought to be fairly easy, since one already has a "PCB" or "Printed Circuit Board". Just place all the pieces in the proper holes and solder it all together.
If you have never hooked up an electronic circuit before, I suggest you buy a bag of resistors, some capaciators and a few individual transistors. Next, you will need a "breadboard". This is a circuit assembly tool and has hundreds of little holes where the components hook up. Next, try and build an "astable multivibrator circuit". It is just 4 resistors, two transistors, a pair of LED's and two capaciators. Designed right, the two LED's will blink on and off in sequence. It is not exactly the most sophisticated circuit in the world, but is a good introduction to electrical engineering.
Have fun & Good luck!
Auto Meter Cobalt Digital Voltmeter And Oil Pressure Gauge in a Jaguar XJ6
