📊 Eiechip LED Digital Voltmeter Ammeter: Mini DC Digital Multimeter 100V 10A, Blue Red LED Amp Dual Digital Display Volt Meter Gauge for Car Current Monitoring and Testing 0.28 inch display Review

I bought two of these for a 29.5vdc power supply I'm building. Neither of these are very accurate, but good as a reference for roughly the specified output voltage. However, one of them is buggy and reading too high, causing it to think it's over 30V when it isn't, and then turning off completely. Pretty useless actually. You can see in the picture that the meter reads 33.2V with no load when the actual voltage is 29.13V. If I increase the voltage to 29.14V, the meter's over-protection trips…

I've used them on several projects. I used the first one with a bit of blissful ignorance - assuming the values were correct. For the second project I decided to check the values with a multimeter (commercially available) and found that the values were wrong. There are potentiometers to adjust the device. After that, the instrument came much closer to reading the meter as I applied different loads and conditions. Overall I think it's a good, compact and inexpensive instrument. Just check and…

Use these to monitor the 1/64 V/A track autotrack slot, 1 for each track. Accuracy is acceptable but not exact which I wasn't expecting anyway as they serve their intended purpose. The problem is that they don't work properly when using track power supplies. Puzzling why after trying several standard power supplies, but no running in standby, constant blinking with constant power. They will only work with a power supply that has the manufacturer's interference coil or a separate battery pack…

I have a 12 volt solar system and I wanted this meter to show what voltage my battery is reading and how much current is flowing through my charge controller. I decided to use the voltmeter wires before connecting the load to it with the booster wires connected, so it was only connected to two. It was connected to the terminals of my charge controller and as soon as the switch was turned on to turn on the controller it blew out. My Fluke showed 12.4 volts on the battery while drawing 0 amps…

I like this counter in many ways. It is attractive, easy to install and has a high build quality. I have an accuracy problem. My application is 2.5-20VDC at 3A. Both current and voltage are not accurate. I adjusted the trims on the back which improved things a bit but not enough. For example, if a calibrated, high-quality benchtop meter and high-precision power resistors are used to measure current at different voltages, both parameters will have an error of up to 10% or more. The only…

I bought this meter for use in a desktop regulated DC power supply that I have not yet built but I have a few Basic tests done with it to make sure it works and seems like it's doing everything I need it to. - Right out of the box it measured DC voltage to within 0.1V of my multimeter reading with no setup or calibration. - The meter is designed to be mounted in a panel and the bezel that is included makes installation much easier and should help hide any imperfections around the mounting hole…

I am building a battery box for a ham radio and this meter could be used to monitor battery charge voltage and current. However, the current was off more than 50% of the reading, too low for the Fluke 87 meter I used to calibrate it. The adjustment on the dash was not close enough to cover the required adjustment. This meter is only good for reading voltage, which was pretty accurate. The current reading is so bad it's going in the e-waste and I'm going to look for another one that will give me