HardLabs

Softy

Broosky·Softy·KiCad/Softy.kicad_sch

This repository ships a schematic but no board layout.

About the Softy PCB

Softy is an open source PCB design by Broosky, published on GitHub. It is a board, with 38 components from 24 distinct parts.

Other key parts include the LM393. By type, the board carries 16 resistors, 5 connectors, 4 diodes, 4 capacitors, 3 transistors and 2 fuses.

It belongs with the audio and power & battery designs in this gallery.

From the project

A custom supercapacitor soft starter controlled by an ATX power supply for high-current applications.

Softy is a project I designed and built to enhance my home stereo system by integrating a 12V supercapacitor for improved transient power response.

In the late 2000s (around 2008), I ran a car head unit (40W × 4) along with a 600W sub amplifier as my primary home stereo. The system was powered by an ATX power supply, with all 12V rails and grounds tied together. The remote turn-on line was connected to 12V, so the system powered up automatically with the supply.

Main components on the Softy

LM393

Softy bill of materials (BOM)

38 components, 24 distinct parts.

QtyPartRefs
1
LM393
U1
2
2N3906
Q1, Q2
1
TIP41C
Q3
1
Vin (12 - 14VDC)
J1
2
Ground
J2, J5
1
Vout (12 - 14VDC)
J3
1
Remote Enable
J4
1
15A
F1
1
250mA
F2
1
Heatsink
HS1
1
Bypass (40A)
K1
1
1156 (12V 27W)
LA1
1
Power (Green)
D2
1
Charging (Red)
D3
1
Ready (Yellow)
D4
1
1N4002
D5
1
100uF
C1
1
1F6
C2
2
150nF
C3, C4
7
4K7
R1, R3, R5, R6, R7, R8, R12
Show 4 more
QtyPartRefs
4
2K2
R2, R9, R10, R11
1
22K
R4
2
100K
R13, R14
2
10K
R15, R16

Softy design files

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

Softy: common questions

How many components are on the Softy?

38 components, from 24 distinct parts. The full bill of materials is listed on this page.

Where can I download the Softy design files?

From the Broosky/Softy repository on GitHub, which has the schematic; the links under Design files point to each one.

Can I use the Softy design in my own project?

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

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