Li-Ion Battery Capacity Evaluation

In the first approximation, we can present a Li-Ion battery as a jar with the following parts:

1. Consumed volume
2. Remaining volume

But why is this not true, and why can't we consume all the charge from the battery?

Extracting Li-Ion Battery Open Circuit Voltage (OCV) vs. Depth of Discharge (DOD) Values from an Image of a Graph

I needed tabular values for the dependency of Open Circuit Voltage (OCV) of a Li-Ion battery on Depth of Discharge (DOD), but I couldn't find this data anywhere.

The closest I found was an image of OCV by State of Charge (SOC) in a ResearchGate article. Although the authors provide a formula for modeling these values in the article, I only needed an array of approximate values.

Therefore, I decided to extract them directly from the image.

Arduino ► Vin ► Vcc ► ADC (analogValue)

Nicos Weg ► Bonn

In which city was the film "Nico's Weg" shot?

"Nicos Weg" film was shot in the city of Bonn. Here is a screenshot from Google Earth 3D that matches one of the scenes from the film, which helped me identify the city.

Arduino: 1023 or 1024

We have a thermistor connected to an Arduino through a voltage divider circuit. The voltage divider consists of the thermistor and a second fixed resistor.

Custom Arduino Driver for Battery Gas Gauging Device BQ28Z610

This is a driver for Arduino that provides functions to interface with the BQ28Z610 battery gas gauge device over I2C protocol. With this driver, you can operate the BQ28Z610 device via the serial port from your computer using Arduino.

Functions were implemented based on the documentation:

• Technical Reference Manual (c) Texas Instruments, Literature Number: SLUUA65E, https://www.ti.com/lit/ug/sluua65e/sluua65e.pdf

Not all functions described in the Technical Reference Manual were implemented, but most of them.

The driver also includes some additional service functions for more usability.

One Key Keyboard Layout Switcher

Title image credits:

https://iconduck.com/icons/12138/keyboard

https://emojipedia.org/openmoji/15.0/flag-united-states

https://creativecommons.org/licenses/by-sa/4.0/

This simple program was developed to implement keyboard layout switching using just one key. It utilizes the win32api, thus it will only work on Windows systems. 

Texas Instruments Battery Gas Gauging Device BQ28Z610 JBL XTREME 2 Data Flash Content

This dump of Data Flash was made for the device after few years of active usage.

What Does the Texas Instruments BQ28Z610 Device Function "12.2.19 AltManufacturerAccess() 0x0028 Lifetime Data Reset" Do?

It only writes the following Data Flash values:

0x4280: (I2) [Lifetimes / Voltage / Cell 1 Max Voltage] = 0
0x4282: (I2) [Lifetimes / Voltage / Cell 2 Max Voltage] = 0
0x4284: (I2) [Lifetimes / Current / Max Charge Current] = 0
0x4286: (I2) [Lifetimes / Current / Max Discharge Current] = 0
0x4288: (I1) [Lifetimes / Temperature / Max Temp Cell] = -128
0x4289: (I1) [Lifetimes / Temperature / Min Temp Cell] = 127

Коса з чотирьох мотузок

Коса з чотирьох мотузок

 

Вузол, щоб з'єднати дві однакові мотузки

Вузол "Цепелін"

This Wikipedia and Wikimedia Commons image is from the user Chris 73 and is freely available at //commons.wikimedia.org/wiki/File:Zeppelin_Bend_HowTo.jpg under the creative commons cc-by-sa 3.0 license.

Цей вузол також допоможе надійно зав'язати зубну нитку, щоб вона не вислизала.