Clocks |
| Miniaturised and designed to fit the front of a radio transceiver |
| My first major project: tells sidereal time |
| Uses three 8x8 LED modules driven by the PC parallel port |
| Uses 4-inch high East German Nixie tubes |
| 1'st year university physics project: decodes radio time signals |
| Interesting novelty clock displays the time in binary |
| All-valve receiver, decoder, nixie and Lissajous CRT figures display |
G0UPL |
| G0UPL station and shack details |
| Radio talks I've given during 2006-7 |
| G0UPL workbench construction |
Receiver and Transmitter projects |
| A 1-valve ECL82 rockbound CW transmitter for the 80, 40, 30 and 20m bands |
| A single-chip 80m CW transceiver for portable operation |
| Polyphase method SSB receiver using Tayloe switching mixer |
| All-valve transceiver project (under construction) |
| Multimode Microprocessor-free 30m QRSS beacon transmitter |
| Simple 30m QRSS beacon made from junkbox parts |
| Portable laptop computer USB-port powered 30m QRSS receiver |
| Ultra-low power 40m QRSS beacon |
| Very simple SA602-based direct conversion receiver |
| Micro-miniature transceiver for 20m CW, built into a tiny Ozon mint tin |
| 2m handheld AM transceiver |
| My first radio: 6'th birthday present! |
| Short-wave radio: really just a crystal set and transistor amplifier |
| An early regenerative receiver I made when I was small |
| Simple 2 valve regenerative SW radio receiver |
Other Radio Topics |
| A Guide to Building an Amateur Radio Station, by Frank W Harris, K0IYE |
| A collection of projects and articles about this interesting VFO method |
| ATtiny2313 AVR-controlled GPS-disciplined 10.000000000MHz frequency standard |
| AD9851 DDS generator programmed by DIP switches: NO microcontroller! |
| 12V 5A, 5V 5A heavily filtered, linear regulated PSU |
| Notes on converting a £1 VHF FM radio to a 40m receiver (Pete Morris G1INF) |
| Another cheap radio, Christmas 2005 special offer from Superdrg retail chain in the UK |
| Another cheap radio, Summer 2006 sale from Superdrg retail chain in the UK |
| Christmas again! 2006 offering from Superdrg retail chain in the UK |
| How to homebrew your own crystal frequency! |
| Measurement of crystal parameters: motional inductance and capacitance |
| For tuning of amateur radio antennas |
| High Power 400W version of the ATU |
| 400W Oil-cooled dummy load |
| A few of Dad's valve radio related projects scanned |
| A few pictures of some valves I have, and a little history... |
| Unusual type of filter uses a phasing method |
| Using LEDs and ordinary diodes in place of Varicaps |
| Radio components built from everyday household and DIY materials |
Frequency Counters |
| Binary readout simple 2-chip frequency counter for QRP rigs |
| 3-digit LCD readout for portable QRP rigs |
| Designed to complement my panel mounting clock in a radio transceiver |
| Very useful multi-function counter, timer, logic probe |
| Simple BCD readout frequency counter |
| Vintage US Army BC221T Frequency Meter |
Electronics and Equipment |
| The Simple Man's Spectrum Analyser: easy-build covering 0-140MHz |
| The Crazy Man's Spectrum Analyser: feature packed insane next version |
| Charger for iPods and similar USB devices |
| 2'nd year university physics project: for Isometric Muscle Experiments |
| Dad's homebuilt voltage and resistance meter |
| Dad's Heathkit Signal Generator |
| Simple power supply delivering +5V 3A regulated or +15V 4A unregulated |
| Build a simple intercom using an old audio cassette player |
| Giant LED matrix display for financial applications |
| Simple neon light spinner using valve-era Dekatron |
| A simple all-valve, miniaturised oscilloscope with 1-inch CRT |
| Radio-controlled garden lighting switching unit |
| How to build simple logic gates using just resistors, diodes and transistors. |
| Logs wind speed to SD-card using ATtiny2313 AVR interface. |
| Logs wind speed, direction, temperature and light intensity to SD-card. |
| Customised wind speed logger for Seawind UK |
Computers |
| 3'rd year university physics project: includes Z80 microprocessor controller |
| My home-made Z80 computer with graphics circuit and keyboard |
| New home-made Z80 computer project |
| Exploration and adventures in a fractal universe |
| Design for a 40-bit asynchronous processor built from TTL logic |
| Draft design notes for the CPCNG computer prototype |
| Proposal for an improved instruction scheduler for the F-CPU |
Guest Project Gallery |
| by Anders Lendrup, Sweden |
| by Raimo Jarvi OH8MNM, Finland |
| and Sine/Cosine Generator by Adriano Tencati, Italy |
| by Bozidar Pasaric 9A2HL, Croatia |
| by Jean-Marc Christophe F5SGP, France |
| by Raimo Jarvi OH8MNM, Finland |
Miscellaneous |
| Some interesting stuff which is worthy of note but doesn't fit in elsewhere |
| A dismantled 17-inch DELL computer monitor yields many useful components |
| A listing and current status of all "works in progress" |
| Links to datasheets for all the IC's in my projects |
| Downloads for projects on this website |
| 101 Things to do with commonly available materials |
Links |
indicates unfinished projects!