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2 layers170.5 × 128.5 mmToolbox v2.1, the printed circuit board in 3D

Toolbox v2.1

StudioKAT/Toolbox15

主な機能： - オーディオ/CVミキサー（加算・減算） - CVへのオフセット追加(5V/10V)・極性反転 - 1:3 バッファード・マルチプル - 2:2 ユニティミキサー - 3:1 アベレージミキサー（各チャンネルのゲイン = 1/3） - SIGNセクション：インバーター / 半波整流 / 全波整流 - LOGICセクション：アナログOR / アナログAND - S&Hセクション：サンプル＆ホールド / ホワイトノイズ出力…

Full screenGitHub.kicad_pcb
Size
170.5 × 128.5 mm
Copper layers
2
Thickness
1.6 mm
Parts
340
Nets
201
Pads
844
Tracks, vias
1,809, 410
Pours
20
Routed
Yes
KiCad
KiCad 10.0 (file 20260206)
Created
9 Apr 2025
Updated
6 May 2026

Overview

Toolbox v2.1 is an open-source printed circuit board by StudioKAT, from the StudioKAT/Toolbox repository on GitHub. It is a 2-layer board of 170.5 × 128.5 mm with 340 parts on 201 nets, routed with 1,809 tracks and 410 vias.

It is built around the TL072CDT, CJ431 and 1N4148WS, with the B10K, 1N5819WS and 2SC1815 among its other parts. Its parts include 130 resistors, 46 capacitors, 32 connectors, 24 diodes and 15 ICs.

Main components

7

README

README.md

Toolbox

Toolbox Front

概要 / Overview

Toolbox は、16HPサイズの中にモジュラーシンセに必要な多彩なユーティリティ機能を凝縮した多機能ツールボックスモジュールです。
Mutable Instruments の「Shades」「Links」「Kinks」をベースにしつつ、独自の機能追加を行いました。

主な機能：

  • オーディオ/CVミキサー（加算・減算）
  • CVへのオフセット追加(5V/10V)・極性反転
  • 1:3 バッファード・マルチプル
  • 2:2 ユニティミキサー
  • 3:1 アベレージミキサー（各チャンネルのゲイン = 1/3）
  • SIGNセクション：インバーター / 半波整流 / 全波整流
  • LOGICセクション：アナログOR / アナログAND
  • S&Hセクション：サンプル＆ホールド / ホワイトノイズ出力
  • OFFSET：±5V ↔ 0〜10Vの変換（5Vオフセット）
  • AMP：CVやオーディオ信号の増幅
    • 8V → 10V（x1.25）
    • 5V → 8V（x1.6）
    • 5V → 10V（x2）

Toolbox is a multifunction utility module that packs a wide range of essential modular synthesis tools into a compact 16HP format.
It is based on Mutable Instruments' Shades, Links, and Kinks, with several added original features.

Key features include:

  • Audio/CV mixer (for both addition and subtraction)
  • Offset(5V/10V) and polarity inversion for CV signals
  • 1:3 buffered multiple
  • 2:2 unity mixer
  • 3:1 averaging mixer (each channel gain = 1/3)
  • SIGN section: inverter / half-wave rectifier / full-wave rectifier
  • LOGIC section: analog OR / analog AND gates
  • S&H section: sample & hold circuit / white noise output
  • OFFSET: 5V offset converter for ±5V ↔ 0–10V signal conversion
  • AMP: amplification of CV and audio signals
    • 8V → 10V (x1.25)
    • 5V → 8V (x1.6)
    • 5V → 10V (x2)

仕様 / Spec

  • Format: Eurorack
  • Function: Multi tools
  • Current needs: +12V: 130mA, -12V: 130mA
  • Width: 16 HP
  • Depth: 25mm (including power connector)

販売 / Sales

StudioKATオフィシャルショップで販売しています。(日本国内限定)
https://www.studiokat.jp/items/106541624

ライセンス / License

この作品は Creative Commons 表示 - 継承 4.0 国際 (CC BY-SA 4.0) の下でライセンスされています。
This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License.

クレジット / Credits

更新履歴 / Changelog

  • 2025-05-28 v1.0 Released
  • 2025-07-31 v2.1 Released
    オペアンプ変更、ホワイトノイズ切り替え機能追加、リファレンス電源回路変更

Parts

340
QtyValueFootprintReferences
59100KResistor_SMD:R_0402_1005MetricR10, R11, R103, R104, R106, R107, R110, R111, R112, R113, R114, R115, R116, R118, R119, R121 +43
40PH_Audiokat_eurorack:PH_AudioJack_3.5mm_PadH18, H19, H20, H21, H22, H23, H24, H25, H34, H35, H36, H37, H38, H39, H40, H41 +24
30100nFCapacitor_SMD:C_0603_1608MetricC2, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24 +14
19100RResistor_SMD:R_0402_1005MetricR45, R48, R53, R54, R63, R64, R68, R74, R79, R81, R84, R108, R117, R123, R126, R129 +3
161KResistor_SMD:R_0402_1005MetricR12, R13, R22, R23, R32, R33, R42, R43, R56, R57, R65, R69, R88, R102, R109, R130
12LED_Dual_BidirectionalLED_THT:LED_D3.0mmD3, D4, D5, D6, D7, D8, D9, D10, D19, D21, D23, D24
12PH_LEDkat_eurorack:PH_LED_3.0mm_PadH14, H15, H16, H17, H26, H27, H28, H29, H30, H31, H32, H33
12TL074CDRPackage_SO:SOIC-14_3.9x8.7mm_P1.27mmU1, U2, U3, U4, U5, U6, U7, U8, U9, U10, U11, U12
101N4148WSDiode_SMD:D_SOD-323D11, D12, D13, D14, D15, D16, D17, D18, D20, D22
8PH_SWkat_eurorack:PH_ToggleSwitch_5.1mm_PadH6, H7, H8, H9, H10, H11, H12, H13
8SW_SPDTkat_eurorack:ToggleSwitch_2MS1-T2-B4-M2-Q-E-SSW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8
6200KResistor_SMD:R_0402_1005MetricR66, R67, R71, R72, R77, R78
51MResistor_SMD:R_0402_1005MetricR86, R87, R98, R99, R100
4220KResistor_SMD:R_0402_1005MetricR80, R82, R83, R85
422pCapacitor_SMD:C_0402_1005MetricC33, C34, C35, C36
4B10Kkat_eurorack:Potentiometer_RV09RV1, RV2, RV3, RV4
4PH_Potkat_eurorack:PH_RK097_15mmKnob_BI_UNI_PadH2, H3, H4, H5
3100KResistor_SMD:R_0603_1608MetricR2, R5, R6
310pCapacitor_SMD:C_0402_1005MetricC37, C38, C46
210KResistor_SMD:R_0402_1005MetricR101, R105
210KResistor_SMD:R_0603_1608MetricR4, R7
210uCapacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-AC41, C42
2120KResistor_SMD:R_0402_1005MetricR122, R124
21N5819WSDiode_SMD:D_SOD-323D1, D2
2200KResistor_SMD:R_0603_1608MetricR3, R91
222uFCapacitor_SMD:C_0805_2012MetricC1, C6
22SC1815Package_TO_SOT_SMD:SOT-23Q1, Q2
2TL072CDTPackage_SO:SOIC-8_3.9x4.9mm_P1.27mmU13, U14
1+10V_TPTestPoint:TestPoint_Pad_1.0x1.0mmTP3
1+5V_TPTestPoint:TestPoint_Pad_1.0x1.0mmTP1
1-5V_TPTestPoint:TestPoint_Pad_1.0x1.0mmTP2
10.01uF/16VCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC43
10.1uF/16VCapacitor_SMD:C_1210_3225Metric_Pad1.33x2.70mm_HandSolderC40
1100pCapacitor_SMD:C_0402_1005MetricC45
110MResistor_SMD:R_0402_1005MetricR47
110nCapacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2C44
1150KResistor_SMD:R_0402_1005MetricR120
11KResistor_SMD:R_0603_1608MetricR1
12.2KResistor_SMD:R_0603_1608MetricR94
122pFCapacitor_SMD:C_0603_1608MetricC39
12KResistor_SMD:R_0603_1608MetricR95
133KResistor_SMD:R_0402_1005MetricR49
14.7KResistor_SMD:R_0402_1005MetricR90
1470KResistor_SMD:R_0402_1005MetricR89
149.9KResistor_SMD:R_0402_1005MetricR128
175KResistor_SMD:R_0402_1005MetricR125
1CJ431Package_TO_SOT_SMD:SOT-23U15
1INkat_eurorack:AudioJack_PJ301M-12J39
1IN_+10Vkat_eurorack:AudioJack_PJ301M-12J37
1IN_1kat_eurorack:AudioJack_PJ301M-12J3
1IN_2kat_eurorack:AudioJack_PJ301M-12J5
1IN_3kat_eurorack:AudioJack_PJ301M-12J7
1IN_4kat_eurorack:AudioJack_PJ301M-12J9
1IN_±5Vkat_eurorack:AudioJack_PJ301M-12J36
1JumperConnector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_VerticalJ30
1Kinks_INkat_eurorack:AudioJack_PJ301M-12J22
1Kinks_IN_Akat_eurorack:AudioJack_PJ301M-12J27
1Kinks_IN_Bkat_eurorack:AudioJack_PJ301M-12J28
1Kinks_OUT_FWkat_eurorack:AudioJack_PJ301M-12J25
1Kinks_OUT_HWkat_eurorack:AudioJack_PJ301M-12J24
1Kinks_OUT_INVkat_eurorack:AudioJack_PJ301M-12J23
1Kinks_OUT_MAXkat_eurorack:AudioJack_PJ301M-12J26
1Kinks_OUT_MINkat_eurorack:AudioJack_PJ301M-12J29
1Kinks_OUT_Noisekat_eurorack:AudioJack_PJ301M-12J31
1Kinks_OUT_S&Hkat_eurorack:AudioJack_PJ301M-12J32
1Kinks_S&H_INkat_eurorack:AudioJack_PJ301M-12J33
1Kinks_S&H_TRIGkat_eurorack:AudioJack_PJ301M-12J34
1Links_1to3_INkat_eurorack:AudioJack_PJ301M-12J11
1Links_1to3_OUT1kat_eurorack:AudioJack_PJ301M-12J10
1Links_1to3_OUT2kat_eurorack:AudioJack_PJ301M-12J13
1Links_1to3_OUT3kat_eurorack:AudioJack_PJ301M-12J16
1Links_2to2_IN1kat_eurorack:AudioJack_PJ301M-12J18
1Links_2to2_IN2kat_eurorack:AudioJack_PJ301M-12J19
1Links_2to2_OUT1kat_eurorack:AudioJack_PJ301M-12J20
1Links_2to2_OUT2kat_eurorack:AudioJack_PJ301M-12J21
1Links_3to1_IN1kat_eurorack:AudioJack_PJ301M-12J12
1Links_3to1_IN2kat_eurorack:AudioJack_PJ301M-12J14
1Links_3to1_IN3kat_eurorack:AudioJack_PJ301M-12J17
1Links_3to1_OUTkat_eurorack:AudioJack_PJ301M-12J15
1MMBFJ310Package_TO_SOT_SMD:SOT-23Q3

The 329 most common of 340 parts.

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Questions

How big is the Toolbox v2.1 PCB?

It measures 170.5 × 128.5 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Toolbox v2.1 use?

340 parts, built around the TL072CDT, CJ431, 1N4148WS and B10K. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Toolbox v2.1 KiCad files?

From the StudioKAT/Toolbox repository on GitHub, at the commit this page was made from: the board is v2.1/KiCAD/Toolbox_v2.1/Toolbox_v2.1.kicad_pcb and its schematic v1.0/KiCAD/Toolbox_v1.0/5V_Offset.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Toolbox v2.1 design in my own project?

Its repository states no licence, so its author keeps all rights: ask StudioKAT before reusing the design.