HardLabs

GiantKnob

mathisschmieder·GiantKnob

GiantKnob PCB layout, top view — open source AVR/Arduino board by mathisschmieder

About the GiantKnob PCB

GiantKnob is an open source AVR/Arduino PCB design by mathisschmieder, published on GitHub. It is a 2-layer board measuring 100 × 70 mm, with 105 components from 48 distinct parts.

Its main chip is the ATmega32U4-AU, from the AVR/Arduino family. Other key parts include the 74HC14, SY6280, TPD2E2U06, GL850G and CM108. By type, the board carries 43 capacitors, 32 resistors, 7 switches, 6 ICs, 6 connectors and 4 diodes.

It belongs with the audio and rf & radio designs in this gallery.

From the project

USB-Midi-Controller for SDR Radios

Main components on the GiantKnob

74HC14ATmega32U4-AUSY6280TPD2E2U06GL850GCM108

GiantKnob bill of materials (BOM)

105 components, 48 distinct parts.

QtyPartRefs
1
74HC14
U1
1
ATmega32U4-AU
U2
1
SY6280
U5
1
TPD2E2U06
U6
1
GL850G
U7
1
CM108
U8
1
16 MHz
Y1
2
12 MHz
Y2, Y3
1
ICSP
J1
1
PTT_Select
J2
1
USB_B
J3
1
Headphones
J4
1
Mic
J5
1
PTT
J6
1
Reset
SW1
1
VFO
SW2
1
BTN1
SW3
1
ENC1
SW4
1
BTN2
SW5
1
BTN3
SW6
Show 28 more
QtyPartRefs
1
ENC2
SW7
1
ON
D1
1
CD1206-S01575
D2
1
PTT_LED
D5
1
5V1
D6
4
MH2029-300Y
FB1, FB2, FB3, FB4
12
100n
C1, C2, C12, C18, C21, C23, C24, C25 +4
4
1p
C3, C6, C9, C14
6
47n
C4, C5, C10, C11, C15, C16
4
22p
C7, C8, C42, C43
4
1u
C13, C17, C32, C39
1
22u
C19
6
4u7
C20, C30, C31, C33, C40, C41
2
10u
C22, C27
2
33p
C28, C29
2
470u/6.3V
C37, C38
2
1k
R1, R18
15
10k
R2, R3, R4, R5, R6, R8, R9, R10 +7
4
22
R11, R12, R30, R31
1
100
R19
1
4k7
R20
1
680
R21
2
1M
R22, R34
1
5k1
R23
2
47k
R25, R28
1
1k5
R29
1
2k2
R32
1
1k2
R33

GiantKnob design files

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

GiantKnob: common questions

What microcontroller does the GiantKnob use?

The GiantKnob is built around the ATmega32U4-AU, from the AVR/Arduino family.

How big is the GiantKnob PCB?

The GiantKnob measures 100 × 70 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the GiantKnob?

105 components, from 48 distinct parts. The full bill of materials is listed on this page.

Where can I download the GiantKnob design files?

From the mathisschmieder/GiantKnob repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the GiantKnob design in my own project?

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

Can I test firmware for the GiantKnob without the hardware?

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

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