The Book of Answers

Test_OLED_STM32F103C8.zip

PDF_The Answer Book.zip

Altium_The Book of Answers.zip

PADS_The Book of Answers.zip

96653

IP2326 charging pad - Makita 7.2V battery pack

The charging board is designed to be used with Makita 7.2V battery packs. It features NTC protection and charging equalization, and parameters can be quickly adjusted via a dial. It is suitable for making simple chargers or for secondary development.

It's not that original batteries are too expensive, but rather that homemade batteries offer better value for money.
1. If the charging board uses NTC and equalization functions, it's only suitable for Makita 012 and 022 homemade battery packs; original batteries won't work.
2. If you don't use NTC and equalization, both homemade and original batteries are acceptable; there are no restrictions.
Many experts have already open-sourced the IP2326 circuit on open-source forums; the projects are directly copied from the official schematics.
 
Here are some points to note:
1. I've purchased both IP2326 components from LCSC, and both are usable. The information I have only shows that I can't distinguish between IP2326 and IP2326_NPD. If anyone knows, please reply in the comments.
2. The PCB battery spring package has been modified; the inner hole has been changed to 1.0mm for easier and more precise positioning during soldering.
3. The NTC and B+ terminal springs should have a working height of 3.8mm (C5157250).
4. NTC and equalization are not needed. Do not solder either spring. For the NTC, solder a 51K pull-down resistor.
5. The battery kit I bought from Xianyu (a second-hand marketplace) came with an NTC resistor whose parameters I don't know. It's best to replace it with a 100K NTC resistor with a B value of 3950.
6. Do not remove the battery casing cap before testing is complete; it will be difficult to remove once attached.
7. It's best to use a charger with QC protocol. This will allow the chip's negotiated input voltage to gradually rise to around 7V, reducing voltage drop and heat generation. With PD, it only operates at 5V throughout.
8. Whether a homemade battery can be charged with the original charger is unknown. (Most likely not, as I don't have the original charger.)
 
 

PDF_IP2326 Charging Board - Makita 7.2V Battery Pack.zip

Altium IP2326 charging board - Makita 7.2V battery pack.zip

PADS IP2326 charging board - Makita 7.2V battery pack.zip

BOM_IP2326 Charging Board - Makita 7.2V Battery Pack.xlsx

96654

Cyber ​​Hourglass - Colored Sand Version (Completely Open Source)

Cyber ​​Hourglass - Colored Sand Version

Cyber ​​Hourglass - Colored Sand Edition: The LED dot matrix has been upgraded to use WS2812 iridescent LED beads, making it incredibly beautiful. The effect isn't great in photos taken with a phone, but it looks fantastic in person.
See the demo video on Bilibili; please follow and like!
[Dao Dao Chu's Personal Space - Bilibili] https://b23.tv/fXla7HD
The microcontroller source code is attached.
The STL file for the casing is attached.
The SolidWorks source file for the casing is attached.

ShaLou7Color.zip

Part 16-1.STL

Part 16-2.STL

Part 16-1.SLDPRT

Part 16-2.SLDPRT

ShaLou.hex

PDF_Cyber ​​Hourglass - Colored Sand Version (Completely Open Source).zip

Altium_Cyber ​​Hourglass-Colored Sand Version (Completely Open Source).zip

PADS_Cyber ​​Hourglass - Colored Sand Version (Completely Open Source).zip

96657

xl2596_3

Three 2596 converters handle adj, 12V, and 5V respectively, while one 1117 converter handles 5V to 3.3V conversion. The 2596 converters performed normally in the tests.

This module is designed for use with 12V, 5V, and 3.3V voltages, and also includes an adjustable voltage channel that allows for voltage adjustment by soldering resistors of different values.

PDF_xl2596_3.zip

Altium_xl2596_3.zip

PADS_xl2596_3.zip

BOM_xl2596_3.xlsx

96658

An Arduino development board with an STM32 microcontroller

This is an Arduino development board based on the STM32F103C8T6, with pins fully compatible with Arduino.

To use SimpleFOC on an STM32 microcontroller and with the SimpleFOC Arduino driver board, the idea arose to create an STM32_Arduino circuit board.
An STM32F103C8T6 was used as the main controller, and its shape was drawn exactly according to the Arduino form factor.
Most of the STM32's pins were brought out, achieving pin-to-pin compatibility. The special PWM pins were also dedicated to the STM32 timer output pins.
 
The pinout diagram is shown below.
 
A Keil test program project is provided in the attachment, which can be downloaded via STlink.
Program behavior: The LED toggles every 500ms, while simultaneously outputting an incrementing number (0~255) via serial port.

f103c8t6_arduino_test.zip

Altium_An Arduino Development Board with an STM32 Controller.zip

PADS_An Arduino Development Board with an STM32 Microcontroller.zip

BOM_An Arduino development board with an STM32 main controller.xlsx

96659

Type 86 five-hole socket (magnetic latching relay, metering, Zigbee)

The Zigbee intelligent 86-type five-hole wall socket uses a CC2530 magnetic relay and an HLW8032 metering chip.

Type 86 five-hole wall socket, Zigbee (CC2530), power detection, magnetic relay.