Tick Tock Shield Assistance Please

Hi Zhangkun,

Unfortunately the 7 segment display still does not work with the new library.

I wired the 7 segment display direct to a seeeduino (with current limiting resistors) and it works fine.

I uploaded the "CharacterFlow" example and measured the voltages at the TM1636 IC

CLK to GND: 4.95 to 4.99V
DIO to GND: 4.95 to 4.99V
5V to GND: 5V
A1, A2, A3 and A4 to GND: 1.55V
A, B, C, D, E , F, G and DP to GND: 0V

I uploaded the "MeasureTemperature" example, and the result is the same as above.
I uploaded the "RealTimeClock" example, and the result is the same as above.

Since the 7 segment display has common cathode at pin 12 (A1), pin 9 (A2), pin 8 (A3) and pin 6 (A4), I would expect the opposite voltage measurements at the TM1636 IC.

For example, if we want to show 8 in the far right segment, we need pin 10 (A4) of the TM1636IC to go to 0Vdc, and voltage output from pin 2 (segment a) to pin 8 (segment g)

Are we meant to have common anode 7 segment display instead?

Regards,

Vincent

Statistics : Posted by hardware • on Sun May 05, 2013 11:55 pm • Replies 12 • Views 289

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