HardLabs

OpenThereminV4

GaudiLabs·OpenThereminV4·Electronics/OpenThereminV45.kicad_pcb

OpenThereminV4 PCB layout, top view — open source AVR/Arduino board by GaudiLabs

About the OpenThereminV4 PCB

OpenThereminV4 is an open source AVR/Arduino PCB design by GaudiLabs, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 50.5 × 128.5 mm, with 97 components from 46 distinct parts.

Its main chip is the ATmega328P-AU, from the AVR/Arduino family. Other key parts include the TTP223, 74HC4060D, 74HC74, HEF4069 and MCP4921-E/SN. By type, the board carries 36 capacitors, 22 resistors, 15 connectors, 12 ICs, 6 crystals and 3 diodes.

It belongs with the test & measurement designs in this gallery.

From the project

Open Source Theremin Instrument

Schematics, printed circuit board (PCB) design, bill of materials (BOM) and Arduino UNO compatible software for the OpenTheremin V4

OpenTheremin is an arduino based real Therein instrument. The legendary music instrument was invented by Leon Theremin back in 1920. The theremin is played with two antennas, one to control the pitch and one for volume. The electronic shield with two ports to connect those antennas comprises two heterodyne oscillators to measure the distance of the hand to the antenna when playing the instrument. The resulting signal is fed into a AtMega328P microcontroller.…

Main components on the OpenThereminV4

TTP22374HC4060D74HC74HEF4069MCP4921-E/SNMCP4922-E/SLMCP6002T-I/SNATmega328P-AUCH340GLP2985-3.3

OpenThereminV4 bill of materials (BOM)

97 components, 46 distinct parts.

QtyPartRefs
1
TTP223
U1
2
74HC4060D
U2, U3
1
74HC74
U4
1
HEF4069
U5
1
MCP4921-E/SN
U6
2
MCP4922-E/SL
U7, U12
1
MCP6002T-I/SN
U8
1
ATmega328P-AU
U9
1
CH340G
U10
1
LP2985-3.3
U11
1
16MHz
X1
1
7.3721MHz
X2
2
MountPad3
Y1, Y2
2
PLUG_3_5_SMD SJ-3502-SMT-TR
Y3, Y7
1
USB_C_Receptacle 12401610E4#2A
J1
1
Conn_02x03_Odd_Even
J2
1
Conn_02x05_Odd_Even
J3
4
10k
P1, P2, P3, P4
1
VCC
P8
2
GND
P9, P16
Show 26 more
QtyPartRefs
1
BUTTON
P10
1
A3_PAD
P11
1
A2_PAD
P12
1
A1_PAD
P13
1
A0_PAD
P14
1
GND_PAD
GROUND1
2
BB914
D1, D2
1
DualLED 156125RB73000
D3
2
1mH CC453232A-102KL
L1, L2
7
150pF
C1, C2, C3, C7, C8, C9, C10
1
not assembled
C4
2
470pF
C5, C12
8
100nF
C6, C13, C23, C24, C25, C26, C27, C28
1
10pF
C11
1
47pF
C14
5
22pF
C15, C16, C17, C18, C34
6
100n
C20, C21, C30, C32, C33, C35
2
10n
C22, C38
1
10uF
C29
2
10u
C36, C37
4
4.7M
R1, R5, R11, R13
5
2.2k
R2, R6, R9, R10, R20
6
100k
R3, R4, R7, R8, R15, R16
4
470
R12, R14, R18, R19
1
10k
R17
2
5.1k
R21, R22

OpenThereminV4 design files

The KiCad project lives in the GaudiLabs/OpenThereminV4 repository on GitHub; these links point at the commit this page was built from.

OpenThereminV4: common questions

What microcontroller does the OpenThereminV4 use?

The OpenThereminV4 is built around the ATmega328P-AU, from the AVR/Arduino family.

How big is the OpenThereminV4 PCB?

The OpenThereminV4 measures 50.5 × 128.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the OpenThereminV4?

97 components, from 46 distinct parts. The full bill of materials is listed on this page.

Where can I download the OpenThereminV4 design files?

From the GaudiLabs/OpenThereminV4 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the OpenThereminV4 design in my own project?

Yes, under the terms of its GPL-3.0 license, which GaudiLabs chose for the repository.

Can I test firmware for the OpenThereminV4 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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