HardLabs

Relay

adarwoo·KiCad·cnc/relay_i2c/relay.kicad_pcb

Relay PCB layout, top view — open source AVR/Arduino board by adarwoo

About the Relay PCB

Relay is an open source AVR/Arduino PCB design by adarwoo, published on GitHub. It is a 2-layer board measuring 45 × 72 mm, with 42 components from 20 distinct parts.

Its main chip is the ATTINY824-SS, from the AVR/Arduino family. Other key parts include the LM1117MP-5.0 and LT1785AXS8. By type, the board carries 10 capacitors, 9 resistors, 6 diodes, 4 connectors, 3 ICs and 3 transistors.

From the project

All KiCad projects

Currently, PCBs for the cnc (see Youtube guillaume.arreckx channel) are publised.

Main components on the Relay

LM1117MP-5.0ATTINY824-SSLT1785AXS8

Relay bill of materials (BOM)

42 components, 20 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM1117MP-5.0
U1
1
ATTINY824-SS
ATtiny824-SS
U2
1
LT1785AXS8
LT1785AxS8
U3
3
IRLML0030
Q1, Q2, Q3
1
~
J2
1
AVR-UPDI-6
J3
1
SCREW_TERMINAL_01X03
Screw_Terminal_01x03
J4
1
SCREW_TERMINAL_01X02
Screw_Terminal_01x02
J5
1
62R
FL1
3
Relay_SPDT
K1, K2, K3
3
471K
RV1, RV2, RV3
3
1J
D1, D2, D3
3
G
D4, D5, D6
2
10U
10u
C1, C2
1
4U7
4u7
C3
4
100N
100n
C4, C5, C6, C7
3
1u
C8, C9, C10
3
22
R4, R5, R6
3
680
R7, R8, R9
3
10K
10k
R10, R11, R12

Relay design files

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

Relay: common questions

What microcontroller does the Relay use?

The Relay is built around the ATTINY824-SS, from the AVR/Arduino family.

How big is the Relay PCB?

The Relay measures 45 × 72 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Relay?

42 components, from 20 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 Relay design files?

From the adarwoo/KiCad 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 Relay design in my own project?

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

Can I test firmware for the Relay 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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