ขาย โมดูลแบตเตอรี่ลิเธียม LM3914 3.7V ราคาที่ดีที่สุด

Diy Kits LM3914 3.7V lithium battery capacity indicator module tester LED display board Characteristics: This is a DIY kit that needs to be assembled by buyers. The electrical display is the percentage of the voltages taken, such as 3.7V lithium battery, 3V, 4.2V, 4.2-3 = 1.2V, and 1.2V, respectively. Lm3914 can accurately detect an analog voltage and have 10 leds displaying 10 leds, displaying point mode, or single-light leds with stripes Display description: display 10 files between the lower and lower voltage limits of the battery, representing 10% of the electricity per lamp and 10 lights showing the range of 0% - 100%; or change the display of a single lamp, i.e. only one lamp, more energy-saving, 4mA, full light 42mA Adjustment of display range for a variety of high and low voltage batteries: Lithium batteries: The voltage of single lithium battery diskharge is 3V and 4.2V when filled. 1s corresponding to 3V (first light) to 4.2V (tenth light); 2s corresponding to 6V (first light) to 8.4V (tenth light); 3s corresponding to 9V (first light) to 12.6V (tenth light); 4s corresponding to 12V (first light) to 16.8V (tenth light); Other series voltages, etc. - Lead acid batteries 6v or 12V lead-acid batteries are generally: 6v corresponding to 4.8V (first red light) to 6.75V (tenth light); 12v corresponds to 9.6V (first red light) to 13.5V (tenth light); The module is designed according to the above standard diskharge range and can accurately reflect the battery power, so that users can easily observe the battery state. The methodology for adjustment is as follows: Equipment required: an adjustable power supply, panel displaying the accuracy of the decision.Watch word screwdriver. In the case of lithium 3.7v alone, 3V is a low end power supply and 4.2V is a high end full power supply. - Adjustable power voltage to desired voltage display 4.2 v high, connected to this plate, and there are two results: one is not bright, one is full light or a few times light.This slow tune 503 (50k) potentiometer board until the LED strip is just on full light.A few lights are not bright or counterclockwise adjustment, when full of light clockwise. - The power supply voltage can be transferred to the required low end of 3V.Adjustable plate 502 (5K) potentiometers light only one LED, clockwise adjustment does not light, counterclockwise lighting a few or all light. - Be patient in repeating the second step of the first step.Usually 2 times to the required display range. Display Mode A/P: full-light linear/single-light array Mode switch, default linear Mode, plate set aside A switch welder, even if there is A welder can become full-light Mode, no welding or spot display Notes: Adjust their voltages, according to the order of adjustment, emphasize the high end, then adjust the low end.Red then positive, then negative, black, must not be reversed, this module is the maximum limit voltage DC 20V, please use antistatic welding or welding table to pull electric welding Specifications: Power supply: strip display full light 42mA, single light display 4mA Measuring range: 2.4-20v commonly used in batteries Light: red/green/blue Display mode: multi-strip or single-point display For lithium battery, lead acid battery, etc. Adjustable display range for battery diskharge curve scientific setting, direct support: single lithium battery 1S (4.2V)~4S (16.8V), lead acid 6V~12V, nickel hydrogen 3.6V~18V, nickel cadmium battery 3.6V~18V Size: 4.5x1.9 cm/1.77x0.75 inch Number: 1 Notes: Allow error of 1-3 mm due to manual measurement.Please make sure you don't mind before bidding Because of the differences between different displays, the picture may not reflect the actual color of the item.Thank you! Packaging: 1 x battery capacity tester