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…
We have a lot of space on the Utility Driver, so I can afford to add some TVS diodes on the ports that go directly out. These are 3.3V and can only handle 6-12mA out – basically they can just about drive a Led with some care. I also need to change UART0 pins +…
I found this schematics on esp32.com forum. I will add pull-up resistors on GPIO0 and EN as well as route them to the extension bus on the TCS. I also need to change pins so I use pin 34/35 as UART0. UARTS can be assigned to any GPIO pins, but in this case I need…
This is a draft of the Utility Driver. Basically this is a ESP32 based driver board with 7 PWM lines, 2 H-Bridges, 12 IO lines and a RS-X connection. The board can be used as a wired/wireless utility board. ESP32 Wroom 7×2 PWM connectors 2 x H-Bridge Motor ports RS-X port w 12V Power inn.…