Soldering 0.5 pitch components is a challenge to get right. My latest problem have been cold soldering. Meaning that pins look ok, but as I test them I have no connection. Not sure if this is lack of temperature, lack of solder tin or what, but I will have to find a more reliable way…
It is rare that I receive chips from China as unprofessional as these, but it does happen. I have no idea if these works at all yet, but we will see. If not the seller will loose out. I actually mounted a XPortHub, so we will see – but, this is why I want to…
This is the XPortHub mounted on top of a Rapsberry PI A+. The only lacking components are the SuperCap + the Serial Flash. I made the package for W25Q16 myself so I have no-one else to blame, but I have used a standard SO8 rather than the wider SO-8 footprint that I needed –…
My next project is actually a Hat for this TFT, so I was not happy to receive a broken display. The vendor sent it out in a bag and well – this has to go back sadly.
This would have been an awesome Hat, and I am “kind of” done routing the PCB, but my remaining challenge is the currents that I need to support. My PCB lanes for 36V+ is far to thin for 12-24A, so this will never work! This version of the Hat have 12 x Current Sensors. One…
One of the next tasks as I emerge from my marathon Hat designs is to wrap up an actual HAL (Hardware Abstraction Layer) in C++ for STM32F405. The Drivers from ST is named “HAL”, but they are low level drivers or merely C functions to interface to registers. They lack abstraction and normalized user interfaces.…
I purchased the breakout board above from ebay earlier, but as I contact KeyStone Semiconductors I am told that these boards have custom programming and that they have no info about the firmware on this module, so be aware – don’t buy these on ebay. I would like to use one of these modules to…
These 2.54 pitch spring terminals occupy more space than I hoped for, so I had to abandon current sensors on each DRV8313 to get room for them. The red areas are the spring connectors. The yellow is the MCU which I desperately need space around since I will be taking out close to every pin…
It’s been many Hat’s lately as I am focusing more and more on this as my main core for everything. I still have a load of Hat’s that I want to start on, but I won’t exactly have much spare time the coming year. This is just a summary of projects that I am working…
Connectors on this board is a challenge because I want to support 3 different usages: 3-Phase that require a 3 pin connector. 4 wire stepper that require a 4 pin connector. PWM that require 1 pin + ground for every signal. The board above uses 2.54 pitch connectors with space to mount small screw terminals.…