Hardware

Repairing of kitchenaid phase control board

It’s a story how I spent thee days troubleshooting 9 elements circuit when 7 of them are passive. I didn’t found what’s wrong, but fixed it. Foreword: I have  control board marked as W10354309, it’s European 220V model of phase regulator. I don’t really understand the rules how kitchenaid marks their parts, because I found […]

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Simple temperature controlled fan regulator

Some time ago I pulled out temperature fan controller from one of old ATX PSU. With 12.2V input it provides 4.5V at 25°C and raises output voltage till 11.8V at ~70°C. After changing Q2 to higher voltage transistor and tuning of R4-R5 this divider this controller should be suitable for 12V fans with 24/36/48V input. […]

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One and a half port charger on TP5100 module

WARNING: Lithium batteries can be extremely dangerous when handled unproperly and lead to fire hazard. Information provided as is, you can use it on your own risk. Before last holidays I bought cheap Chinese action camera, which came without separate charging station. Camera’s battery could be charged only in camera, charging batteries via which have […]

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Upgrade XTLW3 with MKS Sgen_L & smoothieware

I own XTLW3 3D printer which come with MKS Gen_L  8 bit board and MKS MINI12864 display, out of curiosity I decided to try 32 bit board, one of the cheapest option is MKS Sgen_L  board. Earlier I used marlin firmware on gen_l board, but sgen_l come with smoothieware, so I decided to give it […]

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Lenovo battery hack and whitelist at the same time

Recently I’ve got x230 laptop and have a plan to change buggy Intel Centrino 6205 adapter to something like Atheros, also I decided that it’s worth to have ability to use x220 like batteries, just in case. To achieve that, I needed to flash patched firmware for EC controller (thinkpad-ec project) and modified bios (1vyrain […]

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STM32Cube FW_F1 V1.8.0 package breaks HAL time source init

As a hobby I’m working on a growbox controller which based on stm32 MCU. Yesterday I got STM32Cube MCU package update, as many times before I just upgraded package and project to latest version, as result firmware started to stuck in assert_failed(). It happens during call of SystemClock_Config() (defined in main.c) which in turn calls  […]

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Unravel unknown thermistor

Recently I made mistake and made PCB for arduino module where connect temperature sensor to A7 PIN. I’ve envisaged that sensor could be analog (diode) or digital. Soon I’ve learned that diode doesn’t provide enough accuracy even for ±5℃ (2mV/℃) and surprise-surprise A7 pin is only analog input so I can’t use DS18B. I had […]

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KIS-3R33 calculator

Half year ago i wanted to get  in car  PSU to charge my smartphone or to power devices like camcoder. I wanted to build powerful  power supply, first i tried to build it on chip NCP3155, but has failed. I lurking around to find another chip and found complete module KIS-3R33 based on MP2307 chip. […]

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STM32 performance test or how fast you can serve input signal

Finally, i decided to try stm32, before i wrote firmwares only for AVR mega family (from now, when i say AVR MCU, i mean AVR mega family MCU), and was scared by tonns of code that you need for simply led blinking on STM32 MCU. Now i can say, that programming of STM32 not so […]

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Pulseview compilation

Half year ago i wanted to make device that can be used to clone ski pass. I thought that ski passes use RFID 125kHz. First i bought itead module RDM6300 but it turned out that it can only read tags, so i bought  EM4095 chip. At this time i also noticed, that most ski passes […]

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