Wednesday, January 11, 2017

Circuit Schematic Mobile Phone Battery Emulator using LM317 IC

Eltronicschool. - This is one electronic circuit schematic for you using voltage regulator IC LM317. This circuit title with Mobile Phone Battery Emulator using LM317 IC look like in Figure 1 below.

In this tim, beside we will give you global description about electronic circuit schematic of Mobile Phone Battery Emulator using LM317 IC, and we also will give you circuit schematic and component part.

Circuit Schematic

Component Part
  1. LM317
  2. Resistors
  3. Capacitors
  4. LED
  5. Variable resistor
Description

Circuit schematic like in Figure 1 above is Mobile Phone Battery Emulator using LM317 IC. With this circuit schematic, now you can build a battery emulator that would enable him to test and run a Li-ion battery-powered mobile phone without using its battery pack.

How it works

According Electroschematics site describe that the typical target voltage of the Li-ion battery is 4.2 V (note that the target voltage is not the same as the nominal voltage, as it is 3.7 V typical). An adjustable voltage regulator is designed as the mobile phone battery emulator. The circuit based on the popular three-pin adjustable voltage regulator LM317T (IC1) receives external dc input of 9 V/2 A through input connector J1. The output voltage available at connector J2 can be adjusted from just below 3 V to just above 4 V with the help of the 500-Ω multi-turn preset pot (RP1). Although most devices powered by Nokia batteries appear to work well at about 4.2 V, a little bit of experimentation with the values of resistors R2-R3-RP1 may be necessary. As stated earlier, the 82-kΩ resistor (R4) is essential to fooling the device into thinking that a real battery is attached at its battery connector.


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