Diy Kits LM3914 3.7V Lithium Battery Capacity Indicator Module Tester LED Displa
Features:
This is a DIY kits,need buyer to assemble it.
Power display is to take some voltage, perform simulations show the percentage of segments, such as 3.7V lithium take the lower voltage 3V, the upper limit of 4.2V, 4.2-3 = 1.2V, the voltage difference between the lower limit of 1.2V, is the Analog power up
LM3914 can accurately detect an analog voltage, and 10 LED display, display dot mode LED is lit 10 one, or in a stripe pattern individually lit LED
Display Description: Displays the voltage between the lower limit of 10 files showed that representatives of each of the lights 10% charge displays, on behalf of 10 lights display charge 0% range; you can also change the single light display, is displayed only a light, more power, single-light power 4mA, all bright 42mA
A variety of high and low voltage display range adjustment:
1. Lithium
After the completion of a single lithium discharge voltage is 3V, when fully charged 4.2V;
1S correspond to 3V (first light) to 4.2V (tenth lights);
2S corresponds to 6V (first light) to 8.4V (tenth lights);
3S correspond to 9V (first light) to 12.6V (tenth lights);
4S correspond to 12V (first light) to 16.8V (tenth lights);
Other series voltage and so on.
2. Lead Acid Batteries
6V or 12V lead-acid is generally:
6V corresponds to 4.8V (first red light) to 6.75V (tenth lights);
12V corresponds to 9.6V (first red light) to 13.5V (tenth lights);
The module according to the above standard discharge range design, can accurately reflect the so that users can readily observe the status of the
Adjustment of the following methods:
Equipment needed: an adjustable power supply, precision accuracy of the decisions of the panel display. Watches word screwdriver.
for Case in single 3.7V lithium, 3V is less low-end power, 4.2V for the full power of high-end.
1, the adjustable power supply voltage to the desired voltage display high 4.2v, connect this board, this for time there are two results: one is not bright, one is all bright or light a few. This for time slow adjustment plate 503 (50k) potentiometer until the LED strip just lit up the whole. Several light does not shine or counterclockwise to adjust, when full light clockwise.
2, the adjustable power supply voltage to the low end of the desired 3V. Adjustment board 502 (5K) potentiometer to just light a LED, does not light clockwise adjustment, several or all bright light counterclockwise.
3, patiently repeating the first step two. Usually 2 times to adjust to the desired display range.
Display Mode A / /
Note:
To adjust their voltage, according to the of adjusting the order, to emphasize high-end, then adjust the low end.Red then positive, then negative black, must not be reversed, this module is the limit voltage for 20V, please use anti-static welding or soldering station pull electric heat welding
Specifications:
Power: bar display full brightness 42mA, single light shows 4mA
Measuring range: the inside the common 2.4-20v
Light Color: Green Blue
Display: Multi-light bar display or a single light dot display
Suitable for lithium batteries, lead-acid batteries and other power batteries need to be displayed
Power adjustable display range for the discharge of a scientific setting, direct support: single lithium 1S (4.2V) ~ 4S (16.8V), lead acid 6V ~ 12V, NiMH 3.6V ~ 18V, nickel-cadmium batteries 3.6V ~ 18V
Size: 4.5x1.9cm/1.77x0.75inch
Quantity: 1 Pc
Note:
Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid
Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!
Package Contents:
1 x Battery Capacity Tester