Write data 7 (LED D21) no function

A single board computer using an electromechanical CPU

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Write data 7 (LED D21) no function

Forum: General Discussion

Creator: mkchan

Created: 2024-03-28

Updated: 2024-03-30

mkchan - 2024-03-28

Hello,

I got the problem like this,

The LED D21 doesn't on but when running the demo program, the LED lightly flash. It seem the connection of the LED is good. I will continuous to check the circuit.

Thanks

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mkchan - 2024-03-30

Hello,

I fix it. The LED was reversed soldering!

Thanks

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