HardLabs

Busy toad

giacomo-ascari·busy-toad·pcb/bt_pcb/bt_pcb.kicad_pcb

Busy toad PCB layout, top view — open source STM32 board by giacomo-ascari

About the Busy toad PCB

Busy toad is an open source STM32 PCB design by giacomo-ascari, published on GitHub. It is a 4-layer board measuring 180 × 70 mm, with 215 components from 37 distinct parts.

Its main chip is the STM32H750VBT6, from the STM32 family. Other key parts include the LV3842XDBVR, CS4282P, TAD5242IRGER, STM32H523CET6 and TLV76133DCY. By type, the board carries 98 capacitors, 68 resistors, 18 diodes, 10 switches, 9 ICs and 7 connectors.

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

From the project

Evolution of the digital pedal geekyToad. This page is a list of features/hardware that I would like to implement.

Evolution of the digital pedal geekyToad. This page is a list of features/hardware that I would like to implement.

- Two audio instr/line inputs as TRS Jack (differential or single-ended) - Two audio instr/line outputs as TRS Jack (differential or single-ended) - One stereo output for headphones, hardwired to the two outputs - OLED display, power LED, some non-assigned (yet) LEDs - A lot of buttons and One rotary encoder with push buttono - Volume knob for heaphones - Four analog inputs as TRS Jack (e.g. expression pedals and stomp buttons) - USB C device for power and FS data transfer

Main components on the Busy toad

LV3842XDBVRCS4282PTAD5242IRGERSTM32H750VBT6STM32H523CET6TLV76133DCYMCP6004

Busy toad bill of materials (BOM)

215 components, 37 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LV3842XDBVR
IC1
1
CS4282P
IC2
1
TAD5242IRGER
IC3
1
STM32H750VBT6
IC4
1
STM32H523CET6
IC5
2
TLV76133DCY
U1, U2
2
MCP6004
U3, U4
1
Barrel_Jack_Switch
J2
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J7
1
MICRO_SD_CARD_DET2
Micro_SD_Card_Det2
J14
4
REANNYS216G
ReanNYS216G
J15, J16, J17, J18
3
CG0402MLU-12G
RV1, RV2, RV3
1
R_Potentiometer
RV4
10
SW_Push
SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 +2
2
B5819W
D1, D2
9
LED
D3, D5, D7, D9, D11, D13, D15, D17 +1
7
LED
D4, D6, D8, D10, D12, D14, D16
1
18uH 1.5A
L1
39
100N
100n
C1, C3, C5, C7, C10, C12, C15, C19 +31
21
10U
10u
C2, C4, C6, C11, C17, C26, C27, C29 +13
Show 17 more
QtyPartRefs
12
1u
C8, C13, C25, C28, C32, C35, C37, C38 +4
8
2.2U
2.2u
C9, C14, C53, C58, C67, C69, C71, C72
4
22U
22u
C16, C18, C20, C21
8
470P
470p
C73, C76, C78, C83, C85, C90, C93, C96
4
2.7N
2.7n
C75, C82, C89, C95
2
10N
10n
C91, C97
1
100K
100k
R1
2
47K
47k
R2, R3
2
22
R4, R5
31
10K
10k
R6, R10, R11, R12, R13, R14, R15, R16 +23
1
4K7
4k7
R7
2
5K1
5k1
R8, R9
7
680/510
R17, R18, R19, R20, R21, R22, R23
2
680
R38, R39
8
634
R41, R45, R49, R53, R57, R60, R63, R66
8
91
R42, R47, R50, R55, R58, R62, R64, R68
4
470
R43, R48, R51, R56

Busy toad design files

The KiCad project lives in the giacomo-ascari/busy-toad repository on GitHub; these links point at the commit this page was built from.

Busy toad: common questions

What microcontroller does the Busy toad use?

The Busy toad is built around the STM32H750VBT6, from the STM32 family.

How big is the Busy toad PCB?

The Busy toad measures 180 × 70 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Busy toad?

215 components, from 37 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 Busy toad design files?

From the giacomo-ascari/busy-toad 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 Busy toad design in my own project?

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

Can I test firmware for the Busy toad without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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