AB1815 breakout board test

A project log for antique Nixie clock

pimp up grandma's clock with Nixie tubes

Frank Buss 05/11/2017 at 22:423 Comments

I got the PCBs from @oshpark for my breakout board for the RTC chip:

With some solder paste and my heatgun I managed to solder the QFN IC and the other two parts:

A quick test with my STM32 discovery board, generating some SPI signals shows that it is ticking, when I read the seconds register:

Note the jump from 0x19 to 0x20. This is because it counts in BCD mode.


Johnny Karamello wrote 05/13/2017 at 08:41 point

How did you apply the solder paste? Did you use a stencil?

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Frank Buss wrote 05/13/2017 at 11:50 point

I used a syringe and a toothpick. If you don't use too much solder, it doesn't matter if it is applied between the pins of the QFN-IC as well, when it melts, it flows and sticks to the pins and pads.

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oshpark wrote 05/11/2017 at 23:48 point

nice board and very interesting to see the visualization on the scope!

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