Projects

GPS Projects

• USB-GPS-Hammond - The USB-GPS layed out to fit into a standard Hammond enclosure
• USB-GPS - USB GPS tracker
• GPS Frequency Standard

Ham Radio

• Software Defined Radio (SDR)
• SSB Receiver Design
• Superhet Receiver Design

Amplifiers

• RF-Amp

Antennas

• Antennas

Calculators

• Toroid Coil Winding Calculator
• LC Resonant Frequency Calculator

Crystal Filters

• W7ZOI Filters on Kits and Parts Boards
• SSB6 Design
• Crystal Filter Videos

Filters

• High-Low-Band Pass Filters
• Kits and Parts Lowpass Filter

Mixers

• ADE-MIXER
• DIODE-MIXER
• Kits and Parts Mixers

Operating Equipment

• K3NG Keyer

Test/Measurement

• Antenna Tuner
• Colpitts Crystal Oscillator - Crystal Tester
• Frequency Counters
  • Frequency Counter 5 Digits
  • Frequency Counter 6 Digits
  • Frequency Counter 8 Digits
• NanoVNA - Vector Network Analyzer
• RF Attenuators
  • PE4302 RF Attenuator
  • Homebrew RF Attenuators
  • Attenuator Charts
  • AF7KR "Poor Man's" Step Attenuator
• RF Noise Generator
• Load 50-ohm 20W QRP HF
  • QRP Dummy Load Assembly Instructions
• TinySA = Spectrum Analyzer

VFOs

• HW-9 VFO
• VFO-001
• VFO-002
• VFO-003
• VFO-004
• VFO-005

Vendors

• QRPer - Kits
• QRP Guys - Kits
• QRP Labs

One-Wire

• One Wire Data Logger

Microprocessors

• STM32

Raspberry Pi Cluster

• Raspberry Pi Cluster

Board and Arduino Code Applications

• 4WD
• ANSI Terminals
• Arduino/AVR Programmers
• AVR Disassembly
• BrewStation
• Window Fan controller
• GPS
• GPSDuino
• Host side code to read USB-GPS
• MDI Project
• OBD II - Arduino car automation
• One Wire Datalogger
• Open Data Acquisition System
• QT Py
• Raspberry Pi Camera
• Raspberry Pi Cluster
• Raspberry Pi Case - NES style
• Signal Generator
• STM32F405_PyBoard_Clone
• Serial Terminal
• Software Defined Radio (SDR)
• STM32
• Theremin
• Wake Up - power line monitoring