Contact: info@pavlin.si
I am using U-Link from Keil for my debugging purposes. Sometimes it is quite bulky. I decided to design STLink V2 on a single-sided PCB in smallest possible size. Here is how it looks:
This is preliminary preview. I will post more details after first testing.
Mini USB dongle with STM32F0xx is suitable many for simple, mini projects. I attached speaker to Timer14 PWM output (Pin PA6) and LED (or optocoupler connected to PTT) to GPIO pin PA0:
The provided software is based on USB Virtual Com Port (VCP) device. The setup is done with command line interface using terminal from any PC. The setup is stored in the internal flash and PC is not required for normal operation. The mini beacon keyer can be used when powered with 5V.
I have finished my gimbal project for Garmin Virb Elite action camera and I’ll try to explain how it works and what parts I used.
Here is single sided design for prototyping with 20 pin microcontroller STM32F070. This MCU is interesting due to:
Here’s the design. I will post some interesting USB projects in the future based on this board.
Continue reading ‘STM32F070 USB miniature dongle for prototyping’ »
Some photos of first “serious” parts made with new all metal extruder and CNC 3D printer.
All prints are made with ABS, without heated bed! Part scale: diameter is 10mm.
I followed the ARRL Homberw challenge 50 watt aplifier entry. It is low cost, simple HF linear amplifier designed and built by the author as an entry in the ARRL’s 2009 Homebrew Challenge contest. The requirements of the amplifier were: 40 meter band 50 watt output amplifier intended for use with a QRP transmitter as driver (less than 5W), constructed at a total material cost of not over $125.00.
I redesigned author original design an put it on the double sided PCB with additional output banpass filters. I started with first prototype:
ADF4351 is very interesting PLL chip with many features. Here is prototyping board to start playing around with this interesting chip.
Following this interesting heat-less, laminator-free process I decided to test it myself:
Continue reading ‘Comparing two DIY PCB prototyping processes’ »
Here’s teardown of a Garmin Virb camera AV cable. You can find pinout and “ID” resistor at the end of the post:
http://gal.pavlin.si/galwii/?page_id=196
Machine with new motion controller performs very well. Continue reading ‘First 3D print with new machine’ »