I finally have done some CNC-cutting and Laser-cutting in makeraustria.at So a great place for dusty and also fine projects! I really want to do some woodworking here! And watched Starship launch, live. So an amazing view, and amazing commentary from EverydayAstronaut. I’m excited to see the next Starship launch as soon as Stage 0 …
Category Archives: electro
Control Theory
This week was under the title “control theory”. Unfortunately, I didn’t understand this topic well at the university, these s-planes and z-transforms were purely black magic. And I couldn’t connect them meaningfully together. But thanks to XXI century and youtube, you can find amazing things. Like Phil’s Lab, where I’ve learned about applying z & …
Magnetic levitation, CNC milling, and Extraction 2
I received a magnetic levitation kit! Prepared everything for soldering, and then…
A bit this a bit that
I finished layout preview for the my PX15c variant: Now I’m waiting for parts to double-check everything. PCB is designed in a way, that it will be used as a back cover too… So all VIAs will be hidden behind the rubber legs, and it will contain some redesigned tables:
I’m impressed. I’m lost…
I’ve received 5x ESP32 (because, you know, STM is now pretty hard to get). First evening: unpacked one, flashed MicroPython, sta_if.scan()… nothing. What? It sees something only if very close to the router. Panicked, installed Arduino (no!!!!), flashed… nothing. It was late… The next day, unpacked the other four, flashed Arduino WiFiScan. And everything works! …
TX->RX ACK nRF24L01+
Actively experimenting with nRF24L01+ A lot of code, a lot of documentation, and finally, after many years, they are running. One sending, one receiving – beautiful! After some more code, I’ve done a scanner.
Vacation
Still enjoying my vacation. Ice cream, parks, museums, and good weather. Still, I managed to assembly two boards (yeah, the flatiron soldering project works!) Now testing FRAM (512 bytes only, but can be written 1012 times, and at 35°C can retain data 200 years, and it is really RAM). Very funny addressing of internal memory …
HAL_SPI_Receive & RXONLY bug (STM32)
I need to get data from MAX6675 Cold-Junction-Compensated K-Thermocouple to-Digital Converter (0°C to +1024°C). I need only to read 16 bit and I good. Sounds easy? Not so fast! Almost every MAX6675 library used full-duplex SPI mode with sending dummy bytes to /null. I don’t need that, I thought. Let’s configure Cube: Mode: Receive Only …
Flat Iron for PCB soldering (WIP)
My VFD demonstrator (on-table clock) is almost ready I plan to add BME280 for temperature/RH/pressure measurement… But Flat-Iron soldering plate project takes my mind… I started from smaller things, like HD44780, and was surprised, how crapy some libraries are… I’ve checked first, older one, and this was horrible. A lot of peaks, long transmission (3.5ms!) …
VFD display is up & running
Everything is placed, some code lines are written… Let’s see, what we have now: