Finally received the PCB for the Train Control System and the Utility Driver. I decided to solder the Utility driver because that has the CG340G USB connection. Soldered the PSU & CG340 was straight up. I am actually impressed by CH340G as it always work and connect to Windows. Soldering ESP32 was straight forward, but…
The LMR14206 ripple was a bit much for my taste. It worked, I had 12V out, 3V3 out and the MCU ticked. But, it’s not a design I can live with. For now I continue on a different board and avoid mounting the DC/DC because I also realized that I could not really bypass it…
LMR14206 with 12V output to a LM1117 3.3V regulator. This is the 3.3V – 350mV ripple – not good. I need to work on that a bit. This is from my Motor Controller with MCU ticking. I probably need to add another coil on the 3.3V, but that add a lot of space, so I…
This is my LMR14206 DC/DC regulator with R1=15K and R2=1K which gives 12.2V out. The white wire is the PCB error I wrote about earlier. This is basically only the reference diagram – just be aware that the datasheet and demo schemtics mess up R1/R2 a little. Myself I use E values, so by setting…
I finally got around to assemble my 3V3 DC/DC converter and it did not work. Somehow I have switched off all checks in the EDA and managed to send it out like this – notice pin 6 is not connected … Luckily this is the first time I stepped into a bug in the PCB.…
I started to loose track of all designs so added a Project page. Counting 22 designs that I have made in 2 years. It is actually more, but some was rejected after design.
Not that many days since I ordered this, so was happy to see it. Caused me to work to 04:00 this morning and voila – Arduino IDE is running smooth. I am not sure I want to continue using Arduino IDE, but was nice to see that it works with ESP32 even if they…
I bought this robot arm a few years back for educational purposes. It’s great fun, but a bit limited in what it can do. The robot consist of 5 DC motors, but no sensors indicating position, so it is basically remote operated with no option for automation. I did create a RPI Hat dedicated for…
This picture show a single Gauge on a form to illustrate how HMI Designer & Browser works. In this case we have a rotating needle that needs to be associated with an input value. What we do is to save this form as an XML and include it in a device. But, we also need…
Early mornig fun. Just changed the driver to use USB (CH340G) and added a separate 12V supply and some jumpers to select power Source. It can now be driven from 12V or 5V and you can use 12V for PWM’s while using USB 5V for ESP32 etc to have some isolation. Also added pull-up for…