June 2020 Meeting Report

Progsig 9th June 2020.

Alex

-described the repair of garden christmas lights.

-ESP32 non-linearity of ADC

-some old STM32 dev boards maple etc. - one with display board still not working

-hacked two pots into a dual gang pot to provide a fine adjust for a buck boost DC converter module. This converter also benefits from an external output filter. The filter effectiveness can be checked with a scope.

Here's the converter and filter circuit :

Steve

- suggested the STM NUCLEO-L432KC as a high performance micro dev board with lots of memory.

It is an ARM M4 in an Arduino Nano form factor,

Includes ST LINK programmer/debugger.

80MHz

256K FLASH

64K SRAM

Price is $17 delivered from RS Components.

Can be programmed with mbed - the online development environment.

POST MEETING NOTE -

I logged into mbed and selected the new board type.

I re-compiled a 'blinky' program as used on a previous Nucleo board.

I plugged the NUCLEO-L432KC into my USB port, it appears as a USB device, right click & selected download.

Code ran first time with LED blinking at the defined rate.

That's the way it should be !