[Under test] Touch solution verification board based on BS8116A-3

• The BS81x series chips have 2~16 touch buttons and can be used to detect human hand touch movements on external touch buttons. This series of chips has a high level of integration and requires only a few external components to detect touch keys.
• The BS81x series provides serial and parallel output functions to facilitate communication with external MCUs for equipment installation and touch pin monitoring purposes. A special integrated circuit is used inside the chip, which has a high power supply voltage rejection ratio, which can reduce the occurrence of key detection errors. This feature ensures that the chip still has high reliability in applications with adverse environmental conditions.
• This series of touch chips has features such as automatic calibration function, low standby current, and resistance to voltage fluctuations, providing a simple and effective implementation method for various touch button applications.

                                        -----------------------copy from datasheet

• When DC 5V power supply is provided, press the button to get the corresponding display on the digital tube.
• The SPI burning port and Serial burning port of the main control chip are reserved, supporting two methods of burning programs.
• Leading out the I²C interface to facilitate secondary experiments

Component notes: R2-R4:R6-R18 are not connected under normal circumstances. If you need to discard a certain button, just short-circuit the corresponding pad.

J1 is a jumper pad. You can select the corresponding pad to short-circuit according to the common cathode/anode of your digital tube (it is strictly prohibited to directly short-circuit 3 pads!)

log:

2020-4-16

I am waiting for shipment from JLC every day, and I wrote a 74HC595 driver for the common cathode digital tube driver. I put it in the attachment and may record the welding video.

2020-4-20

I received the PCB and the finished product is expected to be soldered within tomorrow. I found that there was an error in the log on April 16th, and the "common yang digital tube" has been changed to "common yin digital tube".

2020-4-21

The welding is basically completed (except for the DC socket and solid filter capacitor) and debugging work is expected to start today.

2020-4-22

Suddenly I remembered that when the signal was put in the 74HC595, the first one put in was at the eighth position. I thought it was at the first position and the entire display program had to be changed.

2020-4-22

Suddenly the program cannot be burned. There should be something wrong with the BootLoader.