Car battery voltage variation,rubber car battery terminal covers,restoring a sla battery explosion,car battery life percentage mean - PDF 2016

09.07.2015
It is relatively well made if a bit plasticky, but certainly as good as should be expected for a device at this sort of price. The LED numerical display is bright – if anything too bright as the voltmeter draws 40mA when it is on which is too high to leave connected to a battery all the time (taking 1Ah of charge from the battery per day). The plastic end cap is threaded onto the positive end of the cigarette lighter plug, and can be unscrewed (with a bit of force).
There is a small circuit board with an IC on it, the LED display, a large resistor, some other common components, and a TL431 adjustable precision zener shunt regulator which is used as the voltage reference. We wanted this to stick on top of a solar charged 12V lead acid battery to display the battery voltage so we chopped off all the unnecessary bits and pieces leaving just the two wires for connection to the + and Рterminals of the battery.


The blue plastic cover is pretty much vital as without it it is very difficult to read the voltage from the display.
Finally, to reduce power consumption, we wired a small push to make button to the white positive input cable and connected that and the black negative cable to the terminals of the battery.
If you are interested in buying one of these car cigarette lighter LED voltmeters click here. Car battery charger and voltage stabilizer MST-60 Automatic Voltage Regulator delivers cost-effective and high quality power protection for many applications and prevents equipment damage from voltage fluctuations and transient surge.
Car battery charger and voltage stabilizer 100A MST-60 Automatic Voltage Regulator delivers cost-effective and high quality power protection for many applications and prevents equipment damage from voltage fluctuations and transient surge.


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