Other Projects

HF-10 Serial Port / USB Logger 4-Channel Voltage monitor

Multi Purpose PIC Controller - as published in RadCom June 2011

PicKit to 'JNT Programming Lead Most projects on this site using PICs make use of a 4 pin in-circuit programming interface. Use this connecting lead to interface to PicKit2 and PicKit3 programmers.

Beacon Keyer Modules small standalone units for personal idents and beacon keyers
Supplied Ready-made, or homebrew your own

RTTY Keyboard Adapter small PIC based adapter for using a PC keyboard to generate raw 5V logic level 45 baud RTTY data. Can be used in parallel with the NUE-PSK Modem with a subset of common control codes. Includes a type ahead buffer to allow for fast typists
PCB layouts, circuit diagram and PIC .HEX code. I'm not making the source code availalble, SRI Folks !

DTMF Remote Controller
DTMF Remote control over a telephone line.
This article was first published in Radio Communication in August 2001

NoiseMeter.zip Modern Soundcard Replacement for the G4COM Noise Figure Alignment aid. With software writetn by G3PLX

Audio VOX Circuit Simple circuit and PCB layout for controlling Tx/Rx switching for datamode software by detecting the audio drive to tx or upconverter. Avoid complications with COM port interfacing

Evanescent Filters for 3400MHz, 5.76 and 10GHz Easily constructed narrow bandpass filters built using standard size waveguide

50-75MHz Bandpass filter with some interesting characteristics
For a frequency converter feeding a wideband Software Defined Radio like the SDR-IQ

Digital Rotator Display as published in Short Circuits, RadCom, Jan 2009

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