Big LED clock with automatic brightness control

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Sergei Bezrukov writes:

Controlling big LED displays that use several LEDs for lighting each segment is a certain challenge. The problem is that the voltage drop on display segments is well above the maximum voltage of microcontrollers. This project describes an approach to this problem based on source and sink drivers TLC59210 and TLC59213 manufactured by Texas Instruments.

Big LED clock with automatic brightness control – [Link]

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