[Open Source] Development Board Power-On Tutorial - Crazy Shell Development Board Series

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[Open Source] Development Board Power-On Tutorial - Crazy Shell Development Board Series [Copy link]

Table of contents

Hardware Hookup

Battery powered

USB port power supply

Notice:

Hardware Hookup

To complete all experiments, you need the following modules:

WT mobile phone development board (mobile phone main control baseboard + mobile phone capacitive screen module + FPC_30P cable + GSM antenna);

200W camera module;

Heart rate and body temperature module;

NFC module (with card);

WT_ wristband development board;

3.7V lithium battery;

Micro USB data cable;

earphone;

TF card;

SIM card;

Dupont wire;

Here we take the complete experiment as an example to carry out the hardware connection. First, connect J1 on the back of the screen module and J4 on the main control board through the FPC_30P cable , as shown in the following figure:

The heart rate and body temperature module is connected via Dupont wire. The J9 and J10 pins are used on the main control board , which correspond to the pins of the heart rate and body temperature module, namely: Output->SPI_MOSI(J10) , POWER->SPI_CS(J10) , GND->GND(J9) , 3V3->3V3(J9) , SCL->SCL(J9) , SDA->SDA(J9) , as shown in the following figure:

Connect the NFC module through the Dupont line. The J7 and J10 pins on the main control board correspond to the pins of the NFC module one by one (the serial port pins are crossed), respectively: RX->TX(J7) , TX->RX(J7) , GND->GND(J7) , 3V3->3V3(J10) , as shown in the following figure:

Put the TF card with the music stored in it into the U8 card slot on the back of the main control board . Put the SIM card into the SIM card slot U11 on the back of the main control board . Insert the 200W camera module into the camera interface CM1 . Plug in the earphones, as shown below:

Battery powered

You can connect the positive and negative electrodes of the lithium battery to the two pins J5 at the lower right corner of the main control board . The square pin is connected to the positive electrode of the battery, and the oval pin (if you are not sure, you can use a multimeter to test it and connect it to GND ) is connected to the negative electrode of the battery, as shown in the figure below:

USB port power supply

You can use a data cable with a Micro USB interface, which is the data cable used by ordinary Android phones. Plug it into the USB interface under the main control board. It is best to connect the other end to the charging adapter of the mobile phone, as shown in the figure below:

Notice:

Since we have pre-burned the code in the development board, SIM900A will be used . The peak startup current of SIM900A is 2A . The USB power supply alone is insufficient, and a battery is needed for power supply. Therefore, it is best to use both battery and USB power supply at the same time.

Jacktang

The distance between the battery pack socket J5 and the copper stud is too close

I like this kind of review, the pictures are very carefully marked