Basestation

The basestation is responsible for setting up and connection between the PC and the robots themselves. At the moment we have two types of basestation, old and new basestation. At the time of writing, 'new basestation' is almost finished, but not yet.

The basestation that is currently in use consists out of a standard Nucleo development board (nucleo f767zi), with a custom PCB slapped on-top of it that hosts two communication chips (SX1280), some LEDs and a display connection. We have a total of three of these stations.

One basestation can only connect to one team (yellow or blue) at the time. This means that if you want to play a game against yourself, you will need two separate basestations.

New Basestation

The new basestation has quite some improvements about which you can read in our TDP from 2023 (link). These basestations should be more stable, have faster USB rates and directly support screens.

Components

Updated 29-08-2023, using the Basestation schematic and BOM

Designator Order code Component name Description Value
3V3, 5V, Active, LED1, LED2, LED3, RX, TX, USB LED
C1, C3, C4, C7, C8, C36 KEMET C0805C104M3RACTU Capacitor CAP 100nF 25V ±20% 0805 (2012 Metric) Thickness 1mm SMD 100nF, 25V 20%
C2, C5, C6, C9, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25, C26, C30, C34, C37, C38, C39, C40, C41 Capacitor 100nF
C27, C28 Capacitor WCAP-PSHP Aluminum Polymer Capacitor, V-Chip, SMT, D8xH8.7mm, 68uF, 20V 68uF, 20V
C29, C33 Capacitor 10uF
C31 Capacitor 12.5nF
C32 Capacitor 12.5uF
C35 Capacitor 12.5uF
D1 PMEG40T50EPX Schottky Diode DIODE SCHOTTKY 40V 5A CFP5 40V, 5A
F1, F2 Fuse
IC1 Low Dropout Regulator LDO Regulator, 1.3A, 3.3 V
J Micro SD Holder 10 _8 + 2_ Position Card Connector Secure Digital - microSDâ„¢ Surface Mount, Right Angle Gold
J1 10118192-0001LF Connector Micro USB B Type Receptacle, -55 to 85 degC, 5-Pin SMD, RoHS, Tape and Reel
L1 B82462-G4 Inductor EPCOS, B82462-G4 Shielded Wire-wound SMD Inductor with a Ferrite Core, 10 μH ±20% Wire-Wound 3.4A Idc 10 μH ±20%
L2, L3, L4, L5, L6, L7, L8, L9 742792641 Ferrite Bead SMD EMI Suppression Ferrite Bead WE-CBF, Z = 300 Ohm 300R, 2A
P1 Header JTAG and usb header
P2, P5, P6, P7, P8 PMPB27EPA P-Channel MOSFET P-channel enhancement mode Field-Effect Transistor (FET) in a leadless medium power DFN2020MD-6 (SOT1220) Surface-Mounted Device (SMD) plastic package using Trench MOSFET technology.
P3 Header Header, 2-Pin
P4 Connector XT60
P9 Header Header, 2-Pin
P10 Connector 2 Way Through Hole SIP Switch SPST
P11 RAPC712X Connector Conn Power PL 2 POS Solder RA Thru-Hole 3 Terminal 1 Port Bulk
R1, R2 Resistor 12k
R3, R4, R5, R6, R7, R8, R9, R16, R17 Resistor 1k
R10, R14, R18, R19, R20 Resistor 150k
R11 Resistor 10.2k
R12 Resistor 1.96k
R13, R21 Resistor 10.4k
R15 Resistor 10.4k
R22 CAT16-473J4LF Resistor Resistor array of 4 47kOhm resistors (1206) 47k
SCREEN Connector FPC connector 20 pin 1mm pitch
SW1 Button TL 1105 - E switch
Switch Switch 4 Way Surface Mount DIP Switch SPST, Raised Actuator Slide Actuator
SX_RX, SX_TX E28-2G4M12S Wireless transceiver EBYTE E28-2G4M12S SX1280 2.4G LoRa Bluetooth Module
U1 USB3300-EZK-TR Connector
U2 STM32F767ZIT6 Microcontroller High-performance and DSP with FPU, ARM Cortex-M7 MCU with 2 Mbytes Flash, 216 MHz CPU, Art Accelerator, L1 cache, SDR…
U3 TPS54332DDA Step Down Voltage Converter Conv DC-DC Single Step Down 3.5V to 28V 8-Pin HSOP EP Tube
X1, X2 Crystal 24MHz Oscillator 5×3.2 24MHz