Candy87

rarepotato8de·Candy87·hardware/Candy87.kicad_pcb

About the Candy87 PCB

Candy87 is an open source RP2040/RP2350 PCB design by rarepotato8de, published on GitHub. It is a 2-layer board measuring 343.6 × 123.4 mm, with 235 components from 33 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the AMS1117-3.3, W25Q128JVS, USBLC6-2SC6 and 74AHCT1G125. By type, the board carries 91 diodes, 19 capacitors, 8 resistors, 5 ICs, 3 connectors and 2 LEDs.

It belongs with the keyboards designs in this gallery.

From the project

Universal TKL PCB that was designed for the F1-8X V2 and similar keyboards. It's exclusively made for Candykeys! 💙

To flash the PCB the first time, you just have to plug it into your computer via. USB-C or Daughterboard and then in your explorer there should appear a new drive medium called "RPI-RP2" or similar. Just drag&drop the .UF2 file onto the drive and the window should automatically close and the PCB will now be flashed and functional. For flashing it another time, plug in the PCB and hold down the "BOOT" button on the backside of the PCB, press the "RESET" button two times and then release the "BOOT" button again. After that the "RPI-RP2" medium should appear.

Candy87, from the project README — From the project README

Main components on the Candy87

RP2040 AMS1117-3.3 W25Q128JVS USBLC6-2SC6 74AHCT1G125

Candy87 bill of materials (BOM)

235 components, 33 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	RP2040	RP2040-QFN-56	U1
1	AMS1117-3.3	SOT-223-3_TabPin2	U2
1	W25Q128JVS	SOIC-8_5.23x5.23mm_P1.27mm	U3
1	USBLC6-2SC6	SOT-23-6	U4
1	74AHCT1G125	SOT-23-5	U5
1	Crystal MPN 12MHz	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	AI03_UD ai03_ud	JST-SR-4	J1
1	USB_C_RECEPTACLE_USB2.0 USB_C_Receptacle_USB2.0	USB_C_Receptacle_HRO_TYPE-C-31-M-12	J2
1	Conn_01x07_Pin	PinSocket_1x07_P2.54mm_Vertical	J3
80	1u	MXOnly-1U-Hotswap	MX1, MX2, MX3, MX4, MX5, MX6, MX7, MX8 +72
1	2u	MXOnly-2U-Hotswap	MX18
1	ISO_ENTER	MXOnly-ISO-Hotswap-ReversedStabilizers	MX37
6	1.5u	MXOnly-1.5U-Hotswap	MX38, MX51, MX95, MX97, MX99, MX101
9	1.25u	MXOnly-1.25U-Hotswap	MX55, MX70, MX87, MX88, MX89, MX91, MX92, MX93 +1
2	1.75u	MXOnly-1.75U-Hotswap	MX57, MX84
2	2.25u	MXOnly-2.25U-Hotswap	MX69, MX72
1	2.75u	MXOnly-2.75U-Hotswap	MX71
1	6.25u	MXOnly-6.25U-Hotswap-ReversedStabilizers	MX90
1	7u	MXOnly-7U-Hotswap	MX98
1	C318884 RESET	SW_SPST_TL3342	RESET1

Show 13 more

Qty	Part	Footprint	Refs
1	USB_BOOT	SW_SPST_TL3342	USB_BOOT1
2	SK6812MINI-E	LED_6028R	LED1, LED2
91	1N4148	D_SOD-123	D1, D2, D3, D4, D5, D6, D7, D8 +83
2	22P 22p	C_0603_1608Metric	C1, C11
10	100N 100n	C_0603_1608Metric	C2, C3, C4, C5, C6, C7, C8, C9 +2
2	1u	C_0603_1608Metric	C12, C13
2	22U 22u	C_0603_1608Metric	C14, C15
3	100NF 100nF	C_0402_1005Metric	C17, C18, C19
2	22	R_0603_1608Metric	R1, R2
2	1k	R_0603_1608Metric	R3, R7
2	5.1K 5.1k	R_0603_1608Metric	R4, R5
1	DNP	R_0603_1608Metric	R6
1	470	R_0603_1608Metric	R8

Candy87 design files

The KiCad project lives in the rarepotato8de/Candy87 repository on GitHub; these links point at the commit this page was built from.

Candy87: common questions

What microcontroller does the Candy87 use?

The Candy87 is built around the RP2040, from the RP2040/RP2350 family.

How big is the Candy87 PCB?

The Candy87 measures 343.6 × 123.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Candy87?

235 components, from 33 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 Candy87 design files?

From the rarepotato8de/Candy87 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 Candy87 design in my own project?

The repository has no license, so all rights stay with rarepotato8de. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Candy87 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.