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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 05:26] – tjhowse
@@ Line 44: / Line 44: @@
 {{:projects:blinker:work_logs:pasted:20220203-003706.png}}
+===== Assembly =====
+{{:projects:blinker:work_logs:pasted:20220224-131812.png}}
+Finally!
+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.
+After solving all of those problems I eventually got some basic code onto it and and recorded a progress video.
+===== Video =====
+{{ youtube>G8RZ3I4DSik?large }}
 ===== Next Time =====