Welcome to Open Source Hardware!
🎯 The Goal: Provide complete hardware designs so you can build your own or have PCBs manufactured professionally.
📁 Each project includes full source files (schematics, PCB layouts, BOMs, firmware) that you can modify and improve.
🌍 Share your improvements back to the community - that's the spirit of Open Source!
How to Build These Projects
1Download & Review
Get the design files and review the schematics using the free tools below. Understand what you're building!
2Order PCBs & Parts
Upload Gerber files to PCB fab houses like JLCPCB, PCBWay, or OSH Park build and assemble and ship you the completed product board or order components from Digi-Key or Mouser using the BOM and assemble it yourself. This is the essence of Open Source Hardware.
3Assembly & Documentation
Order additional parts (enclosures, panels), program CPU if applicable, and assemble. Often requires minimal or no soldering!
Required Design Tools
For PCB design files
For 3D printed designs
For firmware development
Quick browser-based PCB viewer
💡 Ordering & Customization
- PCBs typically cost $2-5 per board for small quantities
- Components can be sourced from Digi-Key, Mouser, or LCSC
- Feel free to modify designs for your needs
- Share improvements back to the community!
⚡ Building Tips
- Start with simpler projects to gain experience
- Double-check component values before ordering
- Use a good soldering iron (if soldering required)
- Test as you build - don't wait until the end!
📊 Cost Considerations
- PCB costs: $10-30 for 5-10 boards
- Components: $20-200 depending on project
- Enclosures & hardware: $10-50
- Total: Usually $40-$300 per project
0-2 GHz Transverter
Wideband transverter covering 0-2 GHz with injection locking and automatic band switching.
IC7300 Transverter Interface
Interfaces IC7300 to transverters with automatic PTT, IF offset, and band data control.
0-2 GHz Kiwi Extender
Extends KiwiSDR coverage to 0-2 GHz. Awaiting Kiwi-3 re-layout.
GNSS/10MHz Disciplined Reference (v2)
Precision 10 MHz reference disciplined by GNSS with OCXO for excellent stability.
📌 System Requirements
All broadband antenna systems require the ShackBoardv2 for power distribution, control, and interface. Please read the Broadband Receive Antenna Systems overview before building.
SAS - Single Antenna System
✅ Recommended: Simplified single-antenna system with excellent performance.
Hybrid Antenna System
Dual-antenna system combining active dipole and loop/Beverage inputs.
PreampA - Active Dipole
PreampB - LoE or Beverage
Junction - A/B Preamp Combiner
Combines outputs from PreampA and PreampB for legacy dual-antenna systems.
ShackBoardv2
✅ Required for all antenna systems: Central power, control, and interface hub.
8-way Active GPS Isolating Splitter
Distribute GPS signals to 8 outputs with isolation and amplification.
4-way Isolating Clock Splitter
Split and isolate clock signals (10 MHz, 100 MHz) to 4 outputs.
Isolating Sloped Filter
Frequency-dependent attenuation filter with isolation for wideband receivers.
LPF60 - 60 MHz Lowpass Filter
Sharp cutoff lowpass filter for eliminating signals above 60 MHz.
LPF30 - 30 MHz Lowpass Filter
Sharp cutoff lowpass filter for HF applications up to 30 MHz.
RX888 Injection Locked PLL
Lock RX888 to external reference for improved stability and synchronization.
TRXduo/RedPitaya Injection Locked PLL
Injection locking solution for TRXduo and RedPitaya SDR platforms.
IC7300 Injection Lock PLL
Lock IC7300's internal oscillator to external precision reference.
Field Probe
Calibrated RF field strength probe for measurements from 1-200 MHz.
Quadripole/Preamp v2
Four-element antenna array with integrated preamplifiers for polarization measurements. Use with ShackBoardv2.
Analog Polyphase Combiner
Combines quadripole signals with phase relationships for polarization analysis.
KiwiSDR Antenna Switch
Remote-controlled antenna switching for KiwiSDR with web interface.
CM Isolation Transformers
Common-mode isolation transformers for reducing noise and ground loops in three package sizes — click a variant to view its project page:
Hi-Z VNA Fixture
High-impedance test fixture for VNA measurements of transformers and high-Z components.
3dB Combiner/Splitter
Wideband 3dB hybrid combiner/splitter for signal distribution or combining.
MPPT Solar Charge Controller Filter
Filter to reduce MPPT switching noise in radio installations.
Az/El Positioner with Web Interface
3D-printed antenna positioner with stepper motors and browser-based control.
3D-printable .1-2 GHz Bi-conical Antenna
Wideband 3D-printed biconical antenna for VHF/UHF measurements and monitoring.
📝 Feedback Welcome
- If you have suggestions for improvements, please contact me
- If you build one of these kits, let me know how it went
- If you have design improvements or new Open Source designs, please share them