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Homegreen-Node

pmalessa·homegreen-Node·hardware/Homegreen Node Basic/Homegreen Node Basic.kicad_pcb

Homegreen-Node PCB layout, top view — open source AVR/Arduino board by pmalessa

About the Homegreen-Node PCB

Homegreen-Node is an open source AVR/Arduino PCB design by pmalessa, published on GitHub. It is a 2-layer board measuring 97 × 23.7 mm, with 67 components from 32 distinct parts.

Its main chip is the ATtiny88-A, from the AVR/Arduino family. Other key parts include the TM1637, FJ3661BH, TTP224, MT3608 and INA180A2. By type, the board carries 26 resistors, 18 capacitors, 8 diodes, 7 ICs, 3 transistors and 3 connectors.

It belongs with the sensors designs in this gallery.

From the project

The system is based on an inexpensive node, which is able to control up to 3 pumps and can be powered by nearly any conventional powerbank. It has a basic user interface using a 6-Digit 7-Segment Display combined with 4 touch buttons. As a pump, you could either use a 4-6V DC pum

The system is based on an inexpensive node, which is able to control up to 3 pumps and can be powered by nearly any conventional powerbank. It has a basic user interface using a 6-Digit 7-Segment Display combined with 4 touch buttons. As a pump, you could either use a 4-6V DC pump or a 5V relay to control a higher voltage pump. The node is designed to be water resistant and can be easily mounted using embedded magnets or a 3D printed holder.

Main components on the Homegreen-Node

ATtiny88-ATM1637FJ3661BHTTP224MT3608INA180A2MT9700

Homegreen-Node bill of materials (BOM)

67 components, 32 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATtiny88-A
U1
1
TM1637
U2
1
FJ3661BH
U3
1
TTP224
U4
1
MT3608
U5
1
INA180A2
U6
1
MT9700
U7
2
BC817DPN
Q1, Q2
1
WST2011
Q3
1
USB_B_Micro
J1
1
USB_A
J2
1
Conn_01x06_Pin
J3
1
SW_Push
SW1
3
BAT54S
D1, D2, D3
1
gr
D4
1
red
D5
2
wh
D6, D7
1
DSS24
D8
1
2.2u
L1
9
100n
C1, C2, C3, C4, C5, C6, C8, C9 +1
Show 12 more
QtyPartRefs
1
0.33F
C7
4
5p
C10, C11, C12, C13
1
330u
C14
3
10u
C15, C16, C17
10
100k
R1, R3, R7, R8, R15, R16, R17, R20 +2
2
47
R2, R6
6
1k
R4, R11, R12, R13, R14, R21
1
1M
R5
2
3k
R9, R10
1
4k7
R18
3
10k
R19, R22, R23
1
20m
R26

Homegreen-Node design files

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

Homegreen-Node: common questions

What microcontroller does the Homegreen-Node use?

The Homegreen-Node is built around the ATtiny88-A, from the AVR/Arduino family.

How big is the Homegreen-Node PCB?

The Homegreen-Node measures 97 × 23.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Homegreen-Node?

67 components, from 32 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 Homegreen-Node design files?

From the pmalessa/homegreen-Node 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 Homegreen-Node design in my own project?

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

Can I test firmware for the Homegreen-Node 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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