In The Air: Episode 9: Pump Control

RE: In The Air: Episode 9: Pump Control

tomaja — Sun, 22 Feb 2015 22:44:25 GMT

I made a similar mistake with PCB.

I selected one of the UART pins for use with dust sensor so I didn't have Serial debugging capability until I assigned a different pin by using the same method as you did [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-193a56c7-c9ec-4947-8a83-6522999fd3ee/contentimage_5F00_2.png:16:16] Since I plan to use the UART for communication with FRAM board later, I had to modify the board, it's not just for the sake of debugging.

Do these inductors always blow so obviously like this or they can burn without showing visible marks? Hopefully my inductor is fine, I only had one (I didn't receive the kits), I will have to check it.

My battery charging circuit is still not working. I tried to re-solder BQ25504 a couple of times (I ordered 3 sample ICs from TI, I will probably have to do it again). I also checked for shorts with multimeter but it all seems fine. It's really hard to resolve the problem with so small device... I'm afraid that the PCB pads might peel off due to too many reworks [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-193a56c7-c9ec-4947-8a83-6522999fd3ee/contentimage_5F00_2.png:16:16] - It's getting very frustrating.

Dragan

RE: In The Air: Episode 9: Pump Control

clem57 — Sun, 22 Feb 2015 08:45:48 GMT

Wow! The detailed work you do Mike is fantastic on solder paste rework and heat flowing for the SMT, Looks like nerve surgery but on tiny leads instead. The key seems to be the right tools and techniques. I like the video[View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-193a56c7-c9ec-4947-8a83-6522999fd3ee/contentimage_5F00_1.png:16:16]

RE: In The Air: Episode 9: Pump Control

fvan — Sun, 22 Feb 2015 08:31:23 GMT

Glad you got your board and pump to work, well done [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-193a56c7-c9ec-4947-8a83-6522999fd3ee/5468.contentimage_5F00_1.png:16:16]