Keszoox
7×9cm Double-Sided Prototype PCB Board — 2.54mm Pitch, 1.6mm, FR4, Arduino (2-Pack)
7×9cm Double-Sided Prototype PCB Board 2.54mm Pitch, 1.6mm, FR4, Arduino (2-Pack)
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7×9cm Double-Sided Prototype PCB Board — 2.54mm Pitch, 1.6mm FR4, Arduino (2-Pack)
This 7×9cm double-sided prototype PCB provides a larger soldering area than the standard 5×7cm board, with plated through-holes connecting top and bottom copper layers at 2.54mm (0.1") pitch. The 1.6mm FR4 fiberglass substrate and 0.95mm aperture holes accommodate standard through-hole components, DIP ICs, and Arduino-compatible headers. Ideal for larger prototype circuits, Arduino Uno/Mega shields, and multi-module IoT boards.
Key Specifications
| Parameter | Value |
|---|---|
| Board Size | 7 × 9cm (70 × 90mm) |
| Hole Pitch | 2.54mm (0.1") |
| Hole Diameter (aperture) | 0.95mm |
| Copper Layers | Double-sided (top + bottom, plated through-holes) |
| Substrate | FR4 fiberglass |
| Board Thickness | 1.6mm |
| Copper Finish | Tin-plated (HASL) |
| Quantity | 2 pieces |
Prototype PCB Size Comparison
| Size | Approx. Holes | Best For |
|---|---|---|
| 5×7cm | ~513 holes | Small circuits, sensor modules, NE555 builds |
| 5×7cm double-sided | ~513 holes (2 layers) | ESP8266/ESP32 breakout, Arduino Nano shield |
| 7×9cm (this listing) | ~1,000 holes (2 layers) | Arduino UNO shield, larger IoT boards, relay boards |
| 9×15cm | ~2,100 holes | Full Arduino Mega shield, complex multi-module boards |
Why Choose 7×9cm Double-Sided PCB?
- Larger build area — ~1,000 holes accommodate Arduino UNO footprint (68.6×53.3mm) with room for additional components
- Plated through-holes — top-to-bottom electrical connection at every hole for complex routing
- 1.6mm FR4 — standard PCB thickness, compatible with standard PCB standoffs and enclosures
- 0.95mm aperture — fits standard component leads (0.5–0.8mm) with good solder joint clearance
- 2-pack value — one for the build, one for the next iteration
Compatible With / Common Use Cases
- Arduino UNO shield: Custom sensor, relay, or display shield that fits over Arduino UNO (68.6×53.3mm footprint)
- Arduino Mega breakout: Larger circuit builds requiring all Mega GPIO headers
- Multi-relay control board: 4–8 relay + ULN2003 + optocoupler circuit for home automation
- Power supply board: LM2596 or 7805 + filter capacitors + terminal blocks for bench supply
- Sensor hub: Multiple I²C sensors (BME280, MPU-6050, DS3231) on one board with ESP32
Frequently Asked Questions
Q: Does the 7×9cm board fit an Arduino UNO shield form factor?
A: Arduino UNO PCB is 68.6×53.3mm. A 7×9cm (70×90mm) board is slightly larger than the UNO, providing enough space for the UNO header footprint plus additional components around the edges. It is not a direct shield replacement (no pre-drilled header positions) but provides ample space for a custom UNO-compatible shield layout.
Q: Can I cut this board to a smaller size?
A: Yes. FR4 can be scored with a utility knife and snapped, or cut with a rotary tool (Dremel) or PCB shear. Score both sides along the cut line, then snap cleanly. Wear a dust mask when cutting FR4 — fiberglass dust is a respiratory irritant.
Q: What solder should I use for this prototype PCB?
A: Use 60/40 or 63/37 tin-lead solder (0.8mm diameter) for easiest soldering. For lead-free, use SAC305 (Sn96.5/Ag3/Cu0.5) with flux. Apply flux to the pad before soldering for clean, shiny joints. Avoid excessive heat — 1–2 seconds per joint at 320–350°C is sufficient.
Package Contents
- 2× 7×9cm Double-Sided Prototype PCB Board (FR4, plated through-holes)
