Electronics

Project-Stinger·Electronics·V2 PCB/Stinger V2.0.kicad_pcb

About the Electronics PCB

Electronics is an open source RP2040/RP2350 PCB design by Project-Stinger, published on GitHub under the Custom license license. It is a 4-layer board measuring 89.8 × 64 mm, with 113 components from 59 distinct parts.

Its main chip is the C2040, from the RP2040/RP2350 family. Other key parts include the C2843335, C17702924, C2897458, C2836813 and C7972. By type, the board carries 36 capacitors, 32 resistors, 14 connectors, 10 ICs, 10 diodes and 4 transistors.

It belongs with the displays & leds and sensors designs in this gallery.

From the project

Electronics for Stinger foam dart blasters

This repository contains the electronics for the Stinger foam dart blaster. The main parts are:

- RP2040 microcontroller with 2MB flash - Gyro sensor (BMI270) - Rapid decay solenoid driver (DRV8243) - 5V step-down and 3.3V LDO - Standby power switch - TOF (Time of Flight) sensor (VL53L0X) - Display output (SPI) and speaker output (PWM) - USB-C for firmware updates and ESC-passthrough - 2 adressable RGB LEDs (WS2812B) - Schmitt trigger for the trigger input - Analog buffer for the ADC inputs - Upgrade port for future hardware upgrades (I2C or UART)

Main components on the Electronics

C2040 C2843335 C17702924 C2897458 C2836813 C7972 C187824 C6186 C2681224 C74456

Electronics bill of materials (BOM)

113 components, 59 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	C2040 RP2040	QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U1
1	C2843335 W25Q16JVUXIQ	Winbond_USON-8-1EP_3x2mm_P0.5mm_EP0.2x1.6mm	U2
1	C17702924 WE-TVS-824015043	SOT-23-6	U3
1	C2897458 Opamp_Quad	TSSOP-14_4.4x5mm_P0.65mm	U4
1	C2836813 BMI270	Bosch_LGA-14_3x2.5mm_P0.5mm	U5
1	C7972 LMV321	SOT-23-5	U6
1	C187824 LMR14020	HSOP-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.1mm_ThermalVias	U7
1	C6186 AMS1117-3.3	SOT-223-3_TabPin2	U11
1	C2681224 74LVC1G3157	SOT-363_SC-70-6	U13
1	C74456 LM5060	VSSOP-10_3x3mm_P0.5mm	U16
1	C537895 BSC105N10LSFG	TDSON-8-1	Q1
1	C8545 2N7002	SOT-23	Q2
1	C15127 AO3401A	SOT-23	Q3
1	BSS138	SOT-23	Q4
1	C454611 12MHz	Oscillator_SMD_Abracon_ASE-4Pin_3.2x2.5mm	X1
1	C393939 USB_C_Receptacle_USB2.0_16P	USB-C	J1
1	C7465628 Conn_01x08_MountingPin	JST_SH_BM08B-SRSS-TB_1x08-1MP_P1.00mm_Vertical	J2
1	C262657 Conn_01x08_MountingPin	Hirose_FH12-8S-0.5SH_1x08-1MP_P0.50mm_Horizontal	J3
2	Conn_01x01	PinHeader_1x01_P2.00mm_Vertical	J4, J5
1	Conn_01x04	PinHeader_1x04_P2.54mm_Vertical	J6

Show 39 more

Qty	Part	Footprint	Refs
1	C2904986 Conn_01x04_MountingPin	JST_SH_BM04B-SRSS-TB_1x04-1MP_P1.00mm_Vertical	J7
1	C2763625 Conn_01x06_MountingPin	JST_SH_BM06B-SRSS-TB_1x06-1MP_P1.00mm_Vertical	J8
4	~	big pad	P1, P2, P3, P4
2	~	medium pad	P5, P6
1	~	button	BN1
1	~	button trigger	BN2
1	C3040833 ~	QFN14-3x4.5_sharedPads	DR1
1	C163109 1.25A	Fuse_0603_1608Metric	F1
1	C553918 40A	Fuse_10032Metric	F2
1	C8678 D_Schottky	D_SMA	D1
1	C8598 D_Schottky	D_SOD-123	D2
1	C12632 D_Schottky	D_SMC	D3
1	C22461793 1N4148WS	D_SOD-323	D4
2	C8678 SS34	D_SMA	D6, D7
2	C965794 LED	LED_0402_1005Metric	D8, D9
2	WS2812B-2020	LED_WS2812B-2020_PLCC4_2.0x2.0mm	D10, D11
1	C702774 3.3µH	L_Cenker_CKCS3015	L1
18	C307331 100nF	C_0402_1005Metric	C1, C2, C3, C4, C5, C6, C7, C8 +10
4	C52923 1µF	C_0402_1005Metric	C11, C12, C14, C15
1	C29823 4.7µF	C_1206_3216Metric	C21
1	C15195 10nF	C_0402_1005Metric	C22
4	C45783 22µF	C_0805_2012Metric	C23, C26, C27, C28
1	C13533 330pF	C_0402_1005Metric	C25
2	C19702 10µF	C_0603_1608Metric	C33, C34
1	C16772 220nF	C_0402_1005Metric	C35
1	C14663 100nF	C_0603_1608Metric	C36
3	C13585 10µF	C_1206_3216Metric	C38, C39, C40
2	C2909343 27R	R_0402_1005Metric	R1, R2
4	C25905 5.1k	R_0402_1005Metric	R3, R4, R10, R24
6	C25741 100k	R_0402_1005Metric	R5, R14, R16, R17, R26, R31
9	C25744 10k	R_0402_1005Metric	R6, R8, R9, R11, R12, R18, R20, R22 +1
2	C11702 1k	R_0402_1005Metric	R7, R15
1	C36871 70k	R_0402_1005Metric	R13
1	C26083 1M	R_0402_1005Metric	R19
2	C25123 510	R_0402_1005Metric	R21, R23
1	C25794 51k	R_0402_1005Metric	R25
2	C25900 4.7k	R_0402_1005Metric	R27, R28
1	C140132 700	R_0402_1005Metric	R30
1	C324860 31K	R_0402_1005Metric	R32

Electronics design files

The KiCad project lives in the Project-Stinger/Electronics repository on GitHub; these links point at the commit this page was built from.

LayoutV2 PCB/Stinger V2.0.kicad_pcb
SchematicV2 PCB/Stinger V2.0.kicad_sch
BOMV2 PCB/exports/Bee/Stinger V2.0 BOM.xlsx

Electronics: common questions

What microcontroller does the Electronics use?

The Electronics is built around the C2040, from the RP2040/RP2350 family.

How big is the Electronics PCB?

The Electronics measures 89.8 × 64 mm, has 4 copper layers and is 1.2 mm thick.

How many components are on the Electronics?

113 components, from 59 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Electronics design files?

From the Project-Stinger/Electronics repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Electronics design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Electronics without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.