2 layers110 × 80 mm D drive r2, the printed circuit board in 3D

D drive r2

S.S.D.D. - Solid State Discrete Drive Schematic and PCB design

Size: 110 × 80 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 111
Nets: 78
Pads: 307
Tracks, vias: 658, 41
Pours: 2
Routed: Yes
KiCad: KiCad 10.0 (file 20260206)
Created: 13 Jul 2026
Updated: 13 Jul 2026

Overview

D drive r2 is an open-source printed circuit board by mesotokyo, from the mesotokyo/solid-state-discrete-drive repository on GitHub. It is a 2-layer board of 110 × 80 mm with 111 parts on 78 nets, routed with 658 tracks and 41 vias.

It is built around the MMBT3904, 2SC2240 and BSS84. Its parts include 34 resistors, 21 capacitors, 18 transistors, 9 diodes and 7 switches.

Main components

README

readme.md

MST S.S.D.D. Schematic and PCB design

これは何？

ICを使用せず、トランジスタやFET、抵抗器、コンデンサなどの部品のみを使ったディスクリート回路で構成したプリアンプ・歪みエフェクター「S.S.D.D.」の回路および基板デザインデータです。KiCAD 10.xで作成しています。

プロダクト情報

S.S.D.D. - Solid State Discrete Drive

回路図について

主な部分の回路図は以下のようになっています。

S.S.D.D.回路図

基板デザインについて

一般的な2層基板です。

表面

S.S.D.D. 基板デザイン表面

裏面

S.S.D.D. 基板デザイン裏面

LICENSE

CC BY 4.0

https://creativecommons.org/licenses/by/4.0/deed.ja

Parts

111

Qty	Value	Footprint	References
8	10k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R5, R10, R12, R14, R31, R32, R33, R34
6	100k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R6, R7, R9, R11, R17, R21
6	1u	ak_misc:C_Rect_L7.2mm_W7.2mm_P5.00mm_with_SMD_3216	C10, C11, C12, C13, C16, C17
4	1M1%	Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal	R1, R2, R3, R4
4	2SK2881	Package_TO_SOT_THT:TO-92_Inline_Wide	Q1, Q2, Q4, Q7
4	MMBT3904	Package_TO_SOT_SMD:SOT-23	Q14, Q15, Q16, Q17
3	10	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R24, R25, R26
3	100	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R16, R20, R27
3	1N4148	Diode_THT:D_DO-34_SOD68_P7.62mm_Horizontal	D3, D4, D6
3	50	ak_misc:GF063	RV10, RV11, RV12
3	MJ161M-topview	ak_misc:MJ161M-topview	J, J, J**
2	0.1u	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C18, C20
2	10n	Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2	C1, C7
2	1N4148	Diode_SMD:D_SOD-323_HandSoldering	D8, D9
2	1k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R22, R23
2	22n	Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2	C2, C5
2	2SK2880-E	Package_TO_SOT_THT:TO-92_Inline_Wide	Q5, Q6
2	2k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R8, R13
2	4.7k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R18, R30
2	47n	Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C19, C21
2	J310	Package_TO_SOT_SMD:SOT-23	Q11, Q12
2	MJ161M-sideview	ak_misc:MJ161M-sideview	J, J
2	NC	Package_TO_SOT_THT:TO-92_Inline_Wide	Q9, Q10
1	100u	Capacitor_THT:CP_Radial_D6.3mm_P2.50mm	C14
1	20k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R19
1	220p	Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2	C3
1	2N7002	Package_TO_SOT_SMD:SOT-23	Q13
1	2SC2240	Package_TO_SOT_THT:TO-92_Inline	Q8
1	2SK2880-D	Package_TO_SOT_THT:TO-92_Inline_Wide	Q3
1	3.3k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R15
1	3.3n	Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2	C9
1	3PDT_FootSwitch	ak_misc:3PDT_FootSwitch_expanded	SW7
1	4.7n	Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2	C4
1	47k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R28
1	47n	Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2	C8
1	47p	Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm	C15
1	47u	Capacitor_THT:CP_Radial_D6.3mm_P2.50mm	C6
1	50	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R29
1	BASS_BOOST:A500k	ak_misc:POT-16mm	RV4
1	BASS_CUT:B250k	ak_misc:POT-16mm	RV3
1	BSS84	Package_TO_SOT_SMD:SOT-23	Q18
1	Barrel_Jack_Switch	Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical	J2
1	Battery	Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical	J3
1	DIST_A:A500k	Potentiometer_THT:Potentiometer_Alps_RK09L_Single_Vertical	RV9
1	DIST_B:A500k	Potentiometer_THT:Potentiometer_Alps_RK09L_Single_Vertical	RV8
1	GAIN_A:A100k	ak_misc:POT-16mm	RV5
1	GAIN_B:B10k	Potentiometer_THT:Potentiometer_Alps_RK09L_Single_Vertical	RV7
1	INPUT_JACK	Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical	J4
1	LED	LED_THT:LED_D3.0mm	D5
1	LED_Dual_AKA	LED_THT:LED_D3.0mm-3	D7
1	MODE_SW	ak_misc:3PDT_FootSwitch_expanded	SW5
1	OUTPUT_JACK	Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical	J1
1	SW_DPDT_BYPASS_MODE	ak_misc:dpdt-sw-micro-2	SW6
1	SW_DPDT_GAIN+	ak_misc:PB_22E85L	SW3
1	SW_SPDT_BST_F	ak_misc:spdt-sw-micro-with-fixer	SW2
1	SW_SPDT_CLIP_MODE	ak_misc:spdt-sw-micro-with-fixer	SW4
1	SW_SPDT_CUT_F	ak_misc:spdt-sw-micro-with-fixer	SW1
1	TREBLE:B100k	ak_misc:POT-16mm	RV2
1	VOLUME_A:A100k	ak_misc:POT-16mm	RV1
1	VOLUME_B:A100k	Potentiometer_THT:Potentiometer_Alps_RK09L_Single_Vertical	RV6
1	Zener:20V	Diode_THT:D_DO-34_SOD68_P7.62mm_Horizontal	D1
1	Zener:4.3V	Diode_THT:D_DO-34_SOD68_P7.62mm_Horizontal	D2
1	~	ak_misc:matrix-jumper_THT	JP1

Questions

How big is the D drive r2 PCB?

It measures 110 × 80 mm and has 2 copper layers, 1.6 mm thick.

What parts does the D drive r2 use?

111 parts, built around the MMBT3904, 2SC2240 and BSS84. 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 D drive r2 KiCad files?

From the mesotokyo/solid-state-discrete-drive repository on GitHub, at the commit this page was made from: the board is d-drive_r2.kicad_pcb and its schematic d-drive_r2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the D drive r2 design in my own project?

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

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/mesotokyo-solid-state-discrete-drive" title="D drive r2 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/mesotokyo-solid-state-discrete-drive.jpg" alt="D drive r2" width="1200" height="900">

A picture that opens the board, for a README

[![D drive r2](https://pcbkit.io/embed/boards/mesotokyo-solid-state-discrete-drive.jpg?size=s)](https://pcbkit.io/boards/mesotokyo-solid-state-discrete-drive)

Source

Repository: mesotokyo/solid-state-discrete-drive
Board file: d-drive_r2.kicad_pcb
Commit: 84b75cf
Licence: Not stated

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