Thursday, December 22, 2016

Circuit of Mobile Phone Battery Emulator using LM317T

Robometricschool. - This is one of the application electronic circuit schematic for battery emulation that titled with Circuit of Mobile Phone Battery Emulator using LM317T like in Figure 1 below.

In this time, beside we will give a circuit of Mobile Phone Battery Emulator using LM317T, we also will give you global description about this circuit and also component listing.

Circuit Schematic

Figure 1. Circuit of Mobile Phone Battery Emulator using LM317T (Source: Electroschematics)

Component List
  1. Resistors
  2. LED
  3. Capacitors
  4. LM317T IC
  5. Variable resistor

This is circuit of Mobile Phone Battery Emulator using LM317T. Depending Electroschematics site which also published this circuit 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.


Post a Comment

Thank's for your visiting and reading this article, please share your idea with comment here