The wires and caps are a bit tricky to get right. the cap should actually be the other way, but I need access to the SWD so had to bend it over the MOSFET’s. This mounting is not ideal, but it is working. It is a 2000uF 63V Electrolyte that is mounted. The only thing…
Finally mounted one unit, only lack capacitors and power wires and we can start spinning motors. I assembled 5mOhm shunts for now to experiment + I used 30V/100A MOSFET’s since I have few of the 60V and this should not be using 60V on this anyway. I will limit testing to 12V and 24V which…
I started assembling Thunderstick and also start finding things I need to change. Mostly small things except one schematic error on the buck converter. It is not fully assembled yet, but 3.3V is working and it’s time to run the MCU. The mechanical mount holes are to close to ground, meaning the bolts my connect…
My Thunderstick PCB’s arrived some time ago, but it has been very hectic at work so I simply had no time to work on it. I also have a new 1kw motor that will be nice to test. The pictures above is the board with DRV8301 mounted. I have to start with this because…
This is the Ethernet board 3D from front. This 3D model is a bit ruff, but it serves its purpose and looking at this I realize that the RJ45 connector is to high. This is not critical as I can adjust hight by extending the pins to the next board (not shown) and use extended…
I am a bit stunned by the memory usage on ESP32. This is a 178 line test script that uses wired Ethernet and it only send an UDP message out – the program uses 645606 bytes – which is 49% of available space. Luckily it does not increase that much, so I assume this is…
Minor upgrade of the Wifi/Ethernet Hat as I remove the 5V Power connector from all Hat’s. It just occupy space and I really needed to add a shortcut protection if I was to keep it. 5V for MCU will now only be available from RPI backbone or USB only. I already have a separate PSU…
Rev 1.3 of my LoRa/GPS Hat. It will be a Rev 1.4 before I order this PCB because I want some changes. I want to remove (11) the UART port and (7) the separate Power port. The 5V power port will be removed on all Hat’s as I want to force 5V through USB or…
Adding the USB console with a buffer so I can perform printf before the console is open was very usefully as I instantly detect that it’s huge differences between starting the device from the IDE on debug mode or on its own. These things are a bit annoying, but they can be handled if your…
Kind of cool – using USB as console on XPortHub – notice all the init messages before the USB starts. Just a buffer tricks. The “Terminal” is a simple C# app that open a port, read/write. I will upgrade it to a proper CLI later. This is maybe the most important part of the infrastructure…