HardLabs

Oneshot

tpcarlson·synth-diy·oneshot/oneshot.kicad_pcb

Oneshot PCB layout, top view — open source board by tpcarlson

About the Oneshot PCB

Oneshot is an open source PCB design by tpcarlson, published on GitHub. It is a 4-layer board measuring 141.9 × 39.7 mm, with 136 components from 38 distinct parts.

Other key parts include the TL072, ONESHOT, LM1117DT-5.0 and LM358. By type, the board carries 42 resistors, 29 capacitors, 27 connectors, 17 diodes, 9 ICs and 2 inductors.

It belongs with the audio designs in this gallery.

From the project

Mostly Eurorack projects

Oneshot is a kind of envelope generator, with a built-in mixer for adding other CV signals to the output or for chaining together Oneshot modules.

Oneshot's brains are on one PCB, with the front PCB offering options for 1U and 3U. The 3U design is my favourite, with a large arcade button and good knob spacing. The 1U design files are also included, if you wish to try them out too.

Oneshot, from the project README
From the project README

Main components on the Oneshot

TL072ONESHOTLM1117DT-5.0LM358

Oneshot bill of materials (BOM)

136 components, 38 distinct parts.

QtyPartRefs
3
TL072
U1, U2, U4
1
ONESHOT
U3
1
LM1117DT-5.0
U5
4
LM358
U6, U7, U8, U9
1
MMBT3904
Q1
8
AudioJack2
J1, J5, J9, J10, J18, J20, J29, J31
2
Conn_01x04
J2, J3
1
Conn_01x04
J4
4
Conn_01x04
J6, J7, J25, J26
2
Conn_01x04
J8, J27
1
Conn_02x05_Odd_Even
J11
1
Conn_01x02 (3u)
J16
4
AudioJack2
J33, J34, J35, J36
4
AudioJack2
J37, J38, J39, J40
8
10k
RV1, RV2, RV3, RV4, RV7, RV9, RV11, RV13
1
~
SW1
1
1N4148WS
D1
2
LED
D2, D9
4
LED_Dual_Bidirectional
D3, D6, D10, D11
2
D_Schottky
D4, D5
Show 18 more
QtyPartRefs
8
BAT42
D7, D8, D12, D13, D14, D15, D16, D17
2
FerriteBead_Small
FB1, FB2
1
10n
C1
1
4n7
C2
8
100n
C3, C4, C5, C6, C7, C8, C9, C12
3
47u
C10, C11, C13
8
1n
C14, C15, C17, C18, C20, C21, C23, C24
8
100n
C16, C19, C22, C25, C26, C27, C28, C29
1
75k
R1
6
100k
R2, R3, R6, R7, R8, R10
1
20k
R4
1
10k
R5
1
24k
R9
2
1k
R11, R12
2
R-LED
R13, R66
4
R-LED
R14, R15, R67, R68
20
100k
R16, R17, R18, R19, R20, R22, R23, R24 +12
4
4.7k
R21, R27, R33, R39

Oneshot design files

The KiCad project lives in the tpcarlson/synth-diy repository on GitHub; these links point at the commit this page was built from.

Oneshot: common questions

How big is the Oneshot PCB?

The Oneshot measures 141.9 × 39.7 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Oneshot?

136 components, from 38 distinct parts. The full bill of materials is listed on this page.

Where can I download the Oneshot design files?

From the tpcarlson/synth-diy repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Oneshot design in my own project?

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

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