projects:blinker:work_logs:3_electronics
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projects:blinker:work_logs:3_electronics [2022/02/17 02:24] – tjhowse | projects:blinker:work_logs:3_electronics [2022/02/27 05:40] (current) – tjhowse | ||
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+ | ===== Assembly ===== | ||
+ | |||
+ | {{: | ||
+ | Finally! | ||
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+ | The PCBs arrived and I soldered on one 25F supercap, the ISP header and two 2x1 SIL headers. I set my benchtop PSU to 2.8v and connected it to the solar panel input. It started drawing several amps as the caps charged up. I quickly dialled down a 100mA current limit, and the voltage slowly increased to the limit of the zener. | ||
+ | |||
+ | ===== Programming ===== | ||
+ | |||
+ | I had quite a lot of trouble getting the firmware onto them: | ||
+ | |||
+ | * USB extension to my workbench was too long, | ||
+ | * 3.3v/5v selector needs to be on 5v, | ||
+ | * The firmware in the USPasp was too old to support TPI, | ||
+ | * The JP3 jumper was not installed, this is required to enable 1 MHz programming speeds, | ||
+ | * I had to use Zadig to install the libusbK v3.1.0.0 driver, | ||
+ | * Arduino IDE reporting avrdude failure when it was actually succeeding. | ||
+ | |||
+ | After solving all of those problems I eventually got some basic code onto it and and recorded a progress video. | ||
+ | |||
+ | ===== Video ===== | ||
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+ | {{ youtube> | ||
===== Next Time ===== | ===== Next Time ===== |
projects/blinker/work_logs/3_electronics.txt · Last modified: 2022/02/27 05:40 by tjhowse