The goal of the experiment

One 、 Draw your own development learning board .

requirement

One 、 Equipped with handle function , It contains a rocker and four keys ;
Two 、 carrying USB turn TTL circuit ;
3、 ... and 、 Equipped with Bluetooth module , For sending messages ;
Four 、 Chip selection stm32f103rct6;
5、 ... and 、 Lead out as many pins of the chip as possible , For learning .

The circuit principle diagram

STM32F103RCT6 part

This part mainly includes MCU The circuit and its peripheral circuits and two rows of pins for pin lead out .

Rocker part circuit

The rocker is the one shown in the figure below , But there is no bottom circuit board , Just simple rocker components .

Bluetooth part circuit

Bluetooth uses Huicheng HC-05 Bluetooth module , It feels good to use .

The reference circuit diagram given by Huicheng official website

On this basis , With a little modification, I became what I saw below ：

USB turn TTL Part of the circuit

LED Light and key part circuit

PCB draw

After drawing PCB As shown in the figure below , Size is 100mm*80mm, It can be made smaller , But think of , Anyway, the price of these models is the same , Don't reduce its size .（ It's just laziness ）

BOM surface

Engineering documents

For learning purposes only

link 1：https://leoeinstein.lanzous.com/it5a4l831sb This is the last two days to sort out the documents modified ;

link 2：https://leoeinstein.lanzous.com/iofk8l832va And this one , It's the first edition of , The measured available .

2021 year 2 month 2 Japan