Smart Ginseng Grower v5 — Raspberry Pi Zero 2W HAT

PCB design for a smart indoor ginseng sprout growing system. Single HAT PCB (120x80mm) with 50 components, stackable with USB HUB HAT and 7" HDMI LCD.

Architecture

┌─ USB HUB HAT (B) ─┐  65x30mm, Pogo-pin
│ [USB][USB][USB][USB]│  → LCD Touch + Webcam x3~4
├────────────────────┤
│   Pi Zero 2W       │  65x30mm
│ [mini-HDMI][OTG]   │  → LCD HDMI (adapter)
├────────────────────┤
│   HAT PCB (120x80) │  2x20 Pin Socket
└────────────────────┘

Model Lineup

Model	LED SMPS	MCU	Webcam	Note
SGG-200R	GT200	Pi Zero 2W	-	Small scale
SGG-200RC	GT200	Pi Zero 2W + USB Hub	3~4	Small + CCTV
SGG-300R	GT300	Pi Zero 2W	-	Standard
SGG-300RC	GT300	Pi Zero 2W + USB Hub	3~4	Standard + CCTV

Specifications

Item	Detail
MCU	Raspberry Pi Zero 2W (BCM2710A1, 1GHz quad-core, 512MB)
Power	AC 220V → IEC C14 → HLK-10M05 SMPS (5V/2A)
Relay	G5LE-1 x3 + 2N7002 MOSFET (Lighting / Motor / Spare)
Sensor	DHT22 (Temp/Humidity), ADS1115 ADC (I2C)
Display	Waveshare 7" HDMI LCD (C) — 1024x600 IPS, Capacitive Touch
USB Hub	Waveshare USB HUB HAT (B) — 4x USB 2.0, Pogo-pin
Enclosure	BOXCO BC-AGS-192810 (190×280×100mm, IP65)
Components	50 total

GPIO Assignment (9 pins)

RPi GPIO	Pin#	Function
2	3	I2C SDA (ADS1115)
3	5	I2C SCL (ADS1115)
4	7	DHT22 Data
5	29	Relay CH1 (Lighting)
6	31	Relay CH2 (Motor)
12	32	Buzzer (HW PWM0)
13	33	Relay CH3 (Spare)
17	11	Watchdog LED
22	15	Mode Button

Power Budget

Load	Current
Pi Zero 2W	~180 mA
Relay x3	~210 mA
DHT22 + ADS1115	~10 mA
Buzzer + LED	~30 mA
7" LCD	~490 mA
Total	~920 mA (46% of 2A)

Cost Estimate

Item	Price (KRW)
HAT PCB (1ea)	₩5,000
Pi Zero 2W	₩22,000
USB HUB HAT (B)	₩8,950
PCB Components (50ea)	₩25,000
7" HDMI LCD (optional)	₩75,500
Total (w/o LCD)	₩61,000
Total (w/ LCD)	₩140,000

Files

File	Description
ginseng-grower-v5.kicad_sch	Schematic
ginseng-grower-v5.kicad_pcb	PCB layout
generate_v5.py	KiCad schematic generation script
CIRCUIT_REFERENCE_V5.md	Circuit reference document
v5-lid-lcd.scad	OpenSCAD lid + LCD positioning
v5-assembly.scad	PCB + enclosure space layout
boxco_bc-ags-192810.py	Rhino 8 Python enclosure model
v5-local.pretty/	Custom KiCad footprints + 3D models
PiZeroHat/	Pi Zero HAT reference library

Tools

• KiCad 10.0.1
• OpenSCAD (parametric enclosure)
• Rhino 8 (3D enclosure modeling)

Related

• v4 — ESP32-S3 version
• Portfolio Website

License

MIT