| GBPPR Special Collection Service |
| THOMASTHORNTON - TOP SECRET//COMINT |
- Modulated Light DX Receiver Circuitry
- OPTICAL COMMUNICATION FOR THE AMATEUR by Chris Long, originally published in Amateur Radio magazine by the Wireless Institute of Australia, Melbourne, January 1979.
- A Low-Noise PIN Diode Laser Receiver! by K3PGP
- A Comb Filter to Remove AC Hum from Mains-Powered Lighting in an Optical Receiver
- AVR Digital Comb Filter (humnuller) by Dan Stahlke
- PIC Humnuller by Karen Orton
- PIC16F876-04 Ran at 20 MHz
- PIC Files