Power supply section
2s lithium battery
6.4v-8.4v
INA180A2IDBVR current sense amplifier
OUT ADC1_CH0 to ESP32
possible function: power supply current monitoring
Voltage regulation/voltage monitoring
OUT ADC1_CH1 to ESP32
steps down to 2.046v-2.686v and remains stable through the capacitor
. Possible functions: step-down module, voltage monitoring
LDO ASM1117-3.3 Low Dropout Linear Regulator
OUT VCC_3V3
low dropout regulator
has low cost, low noise, and small quiescent current. These are its outstanding advantages. It requires very few external components, usually only one or two bypass capacitors, which are consistent with the schematic diagram.
General voltage regulators require a certain voltage difference, which is not convenient for small voltage difference conversion, such as 5v to 3.3v. Use The reason may be that the pupper battery has a low voltage of 2s and requires a small voltage difference. The model may be
Possible functions: voltage stabilization to 3.3v Imax=1A
LED NC/LED-0603 power indicator light
IN VCC_3V3
Possible functions: Power supply voltage stabilization operation normal prompt
DC/DC DC voltage converter
IN Vbat+
OUT VCC_5V
5V Imax=5A High current may be used for servos or other components
Chip SY8105ADC
Analog-to-Digital Converter, often called ADC, refers to converting continuous variable analog signals into discrete digital signals The device
is often used for temperature monitoring and other related information: Analog-to-digital converter
Question: Why is this analog-to-digital converter used here to achieve buck regulation?
Possible functions: 5V regulated power supply
Steering Engine Power on Control
IN Vbat+
IN Vbat_Servo_EN
OUT Vbat_Servo
Internal components:
LMBT2222ALT1G NPN transistor Related information: Performance information
NCE01P18K P-channel enhancement power MOSFET
Question: The specific circuit needs to be understood
Possible functions: Servo power control
ESP32 part
Model ESP32-S3-WROOM-1'
External connection part
The following are the possible exposed external wiring parts
ESP32_IO6 LED
ESP32_IO7
Vbat_Servo_EN to steering gear electronic control
ADC1_CH0 to power supply current monitoring
ADC1_CH1 to voltage stabilizing module 2.0-2.7v power supply voltage monitoring
User DIY GPIO interface
Interface model HC-1.25-6PWT
specific IO number reference circuit diagram
Burning Interface burning port
It should be a TYPEC question
: you need to know more about TYPEC communication and wiring structure.
Please refer to the circuit diagram.
ESP32 and CM4 communication part PWM part
Serial communication
ESP32 U1RXD to CM4 TXD3
ESP32 U1TXD to CM4 RXD3
GPIO contact
ESP32_IO15 to CM4 GPIO25
ESP32_IO16 to CM4 GPIO26
DZ254W-22-06-69 is the angle pin header model
external switch
ESP32_EN to switch1
ESP32_boot to switch 2
switch model TS-1010B-BA
IMU part
Model QMI8658C
IMU English data manual.
Please refer to the connection and data manual for use.
Steering gear part
Servo connection
12-way bus servo
interface model: 2.54-2*3P vertical pin
Servo bus communication
UART to ONE BUS related information: uart related information
is actually a concept of the physical layer (Physical Layer) in the communication network. It
specifies the electrical characteristics, transmission rate, connection characteristics and mechanical characteristics of the interface, etc.
COM (Asynchronous serial communication port) is the abbreviation of PC's asynchronous serial communication port
SN74LVC1G126DBVR. It has a three-state output of one-way 1.65V to 5.5V buffer. One-way bus buffer
has the function of data temporary buffering.
Related information: Texas Instruments
similar information goes to the same group Transmission line, time-sharing transmission of information, three types of computer buses: data bus, control bus, and address bus. In order to prevent information from interfering with each other, it is required that the transmission end of the register or memory on the bus can not only display two states of 0 and 1, but also another state - high impedance state x, which is like a disconnection generally. Therefore, the above functions can be achieved using a tri-state buffer.
SMTSO2530CTJ nut port fastener can be used as grounding GND
other parts
MicrophoneMIC
MSM261S3526Z0CM MEMS microphone x2
TF card
1W Audio AMP
Interface X9821WVS-02-9TSN
NS4890B audio product manual
eMMC
Built-in memory/embedded multimedia controller (Embedded Multi Media Card)