ATtiny85 OLED charger doctor

Sometimes we Realize that our phone does not charge too much.

The reason for this is that the battery may be bad, or it may be a shot on the phone.

Then we can not understand what we should do

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Today I will show you how it is possible to make a Charger Doctor 

By which you can understand that your phone is short, or your phone's battery is half dead

With this device you can monitor your phone's current, voltage and watt.

It's very straightforward to make it

You only need an eight-pin IC and an OLED display And some common components.

---#### Components ####---

#1#  0'96" OLED Display

#2# ATtiny85 microcontroller

#3#  220uf 16v capacitor

#4#   100 nanofarad capacitor x2

#5#   BS170 N-Channel MOSFET

#6#  USB Male A-type  Connector

#7#   USB Female A-type  Connector socket

#8#  Current Sensing 0.01 Ohm Resistor / Shunt

#9#  4.7k resistor x2

#10#  10k resistor x2

#11#  lm1117 3.3 v regulator IC

#12#   270  Ohm  Resistor

#13#  2.2K RESISTOR X2

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Let's see how it's working as an easiest way.

first Collect 5 volts from your charger 

And this voltage convert into 3.3 volt by LM1117 regulator IC

Here's the reason for converting the 3.3volt, to processing IC and OLED Display.

On the other hand, the output voltage of the charger is associated with the output Female A-type  Connector socket, through a Shunt resistor.

0.01 ohm 0.02 ohm this kind of register is used in Shunt resistor.

When the output is loaded due to the Shunt resistor, then some voltage drops, 

and then the IC can measure the drop voltage. then we can see the voltage, watt, current on the OLED display.

I have used ATtny85 IC for this total process unit.

ATtny85 IC is an AVR micro controller chip, to program this is i had used Aruduino uno 

 for Programing this attiny85 there are some pins on the board to connect Arduino uno as ISP or AVR programmer.

according to this diagram i connect ISP pins to Arduino UNO for hex upload.

if you want to make this project then you can MAIL me for hex files ([email protected])  

if you have any questions regarding this then you can ask me ill defiantly help you,

I put a 5 volts adepter in my AC junction board, and connected a male/female cable in this charger

and i connect my board with this cable, and you can see it is showing some text on it.

now i take a phone and connect it with the charger doctor .

and after some time of analysis, it is showing voltage Current and watt.

by this you could know that your phone is taking overCurrent  or your battery is half dead or not.

within some few dollars you can make this and check your phone's current condition

Semantics