王达业

【DEMO】CH551G Touch Ring

Overview

Try to make a touch slider demo on a low-end microcontroller with touch capacitance detection, microcontroller CH551G

It has also been made compatible with multiple microcontrollers, including CH551G, CH552G, and CH552T. Anyway, the header files are the same and the functions are the same.

The digital tube driver uses TM1650, and the foot-to-foot compatible ICs include AIP650, ET6226, GN1650, and CH455G.

Also lead out the pin header of the matrix keyboard that comes with the driver. Direct INT0 to the DP segment driver for interrupt processing.

The UART is brought out to facilitate debugging or communication with other systems, but since it is not a development board, the extra IO of the ssop20 is not brought out.

Demo running video:

VID_20200407_192452 [240p].gif

VID_20200407_235340 [240p].gif

Physical picture:

Program description: The DEMO in the attachment and video has a circle of 72 scales. In fact, 128 scales should not be a problem. If it is increased further, the noise may cause the reading to jitter, and humans cannot control such high precision.

Design Files

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Update:2025-06-23 11:18:13

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