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Soft starter

Susensio·soft-starter·schematics/soft-starter.kicad_pcb

Soft starter PCB layout, top view — open source AVR/Arduino board by Susensio

About the Soft starter PCB

Soft starter is an open source AVR/Arduino PCB design by Susensio, published on GitHub. It is a 6-layer board measuring 73 × 50 mm, with 24 components from 15 distinct parts.

Its main chip is the ATTINY13-20P, from the AVR/Arduino family. Other key parts include the External DC-DC 5V. By type, the board carries 7 resistors, 5 capacitors, 4 connectors, 3 transistors, 2 ICs and 1 switch.

From the project

Arduino project for soft start led strips, imitating incandescent bulbs

Main components on the Soft starter

ATTINY13-20PExternal DC-DC 5V

Soft starter bill of materials (BOM)

24 components, 15 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATTINY13-20P
ATtiny13-20P
U1
1
External DC-DC 5V
U3
3
30N06
Q1, Q2, Q3
1
INPUT 12 V
J1
1
LED1
J2
1
LED2
J3
1
LED3
J4
2
P10K
P10k
RV1, RV2
1
Reset
SW1
2
1u
C1, C2
1
100N
100n
C3
1
47U
47u
C4
1
470U
470u
C6
3
200
R1, R4, R6
4
10K
10k
R2, R3, R5, R7

Soft starter design files

The KiCad project lives in the Susensio/soft-starter repository on GitHub; these links point at the commit this page was built from.

Soft starter: common questions

What microcontroller does the Soft starter use?

The Soft starter is built around the ATTINY13-20P, from the AVR/Arduino family.

How big is the Soft starter PCB?

The Soft starter measures 73 × 50 mm, has 6 copper layers and is 1.6 mm thick.

How many components are on the Soft starter?

24 components, from 15 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Soft starter design files?

From the Susensio/soft-starter repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Soft starter design in my own project?

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

Can I test firmware for the Soft starter 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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