This Digital LED Voltmeter measures the voltage at a particular point of the system it has been hooked up to and then provides a readout on its three 7-segment LEDs. This voltmeter is able to provide a readout of voltages from 2.5VDC to 30VDC within a 1% accuracy.
If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.
Skill Level: Rookie - You may be required to know a bit more about the component, such as orientation, or how to hook it up, in addition to power requirements. You will need to understand polarized components.
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Based on 4 ratings:
2 of 2 found this helpful:
This is a great, little voltmeter at a great price. I installed the first one in my car to have a continuous read-out of battery voltage. I just added a small piece of red plastic used to improve the visibility of LED displays, Sparkfun might consider selling some of this filter material.
I'll just note that the specifications put the digit size at .28". My unit is actually about .38", which is just right for many applications.
4 of 4 found this helpful:
Without repeating the features or what's already been said, I checked one of these for current consumption (useful for some potential applications) - note that consumption fluctuates significantly, here I give a reasonable average over 10 sec. Part of the fluctuation depends on how many segments are lit! 2.5V: 0.21mA (dim but readable) 3.0V: 0.12mA 4.0V: 1.2mA 5.0V: 2.4mA 6.0V: 3.5mA (below 6V the display becomes less bright) 10.V: 5.4mA 15V: 4.9mA 20V: 2.1mA 25V: 1.6mA 29.5V: 2.2mA Note that I used the actual device to determine the voltage.
For $1.50 how can you not buy this? I threw 5 of these in my cart and was so glad I did. These are great for so many things and work like magic.
... for such an incredible price to build into a project in a box, or to stick on an existing project or piece of hardware. A nice feature is the tiny potentiometer to adjust if the reading isn't spot on (for this price you weren't expecting 0.1%, right?) I bought three today and have already used one. I clipped off the longer leads on the back and hot melt glued a scrap piece of plastic on it for a back. Then it was glued to a DC power strip to monitor voltage on a battery backup system for my amateur radio station.
I second the notion of SparkFun stocking the red filter material; it seems to be hard to find, at least in small sizes and quantities.