Hardware type content

• Fun with DSP: Experimenting programming DSP to a dsPIC chip.

• GPS Basics: Global Positioning System (GPS) signals and how you can use them to figure out where you are in the world

• CB Packet Radios On The Cheap: How To Modify DSE PRS Radios For Packet Radio

• FM Controller board: Stereo FM Transmitter Controller. Not Finished and never will be.

• LCmeter: Measures inductance or capacitance.

• Pi Network Matching Calculations: An example into a procedure to solve matching network problems.

• RF havesting part 2: Design of an active radio frequency powered multi-hop wireless sensor network .

• RF havesting part 1: Wireless Sensor Networks Powered by RF Energy Harvesting: Design and Experimentation .

• 1Watt 80m Transmitter for free: A 1Watt 80m transmitter made out of junk old school style.

• “Ham it up” and dvb frequency stability: using a GPS receiver to look at the frequency stability of the “ham it up” and a dvb module.

• The Softrock lite II and WSPR: The incredible softrock II lite and the amazing WSPR digital HAM mode.

• PSK31: Performance investigation and LDPC code improvement: Looking at the performance of PSK31 and how FEC can improve it.

• PSK and FSK over NBFM: Looking at the performance of sending PSK and FSK over FM transmitters.

• JDDS a GUI for AD9850 DDS modules: Create yourself a sine wave signal generator with a nice GUI for a few dollars

• BPSK and Pi/2-BPSK using a DDS via an Arduino: Using an AD9850 DDS module with an Arduino and a PC to produce PSK then looking at the difference between BPSK and Pi/2-BPSK

• A good MSK demodulator made in Matlab: Using an AD9850 DDS module with an Arduino and a PC to produce MSK. This is then demodulated with a program written in Matlab. Performance is similar to unfiltered BPSK but with better spectral rolloff