Scientific Instrumentation, Consumer Products & Audio.
Hardware, Firmware, FPGA, PCB layout, 3D CAD.
Underwater Instrument FlashLamp PSU and Trigger Pack.
A specially developed low
power circuit using a Switched Mode Power Supply for charging a
capacitor to 1200 volts. A custom "Trigger Pack" (shown un-potted)
reduces the quiescent charged load on the supply by half from that of
the Hamamatsu module previously
The supply has a low
standby current and can charge to 1200 volts on demand in under 10 mS
giving a top operational rate of 100 flashes per second from a special
Xenon short arc flash lamp which is a point light sources
providing high luminance and colour temperature.
The flash lamp emits a continuous spectrum of light,
ranging from ultraviolet through visible to infrared.
Filters select the light wavelengths of interest for excitation and a
photodiode detector measures the amount of light returned to the
Prototype Design Concept Ergonomic Flat Split-Hand Keyboard.
Developed as an alternative to
Maltron's full 3D ergonomic
keyboards this design is to provide as much relief as possible for
people who are suffering from "Work Related Upper Limb Disorders" WURLDS
and "Repetitive Strain Injury" RSI problems but who want a more
British Computer Society Review 2004 article
"Let's talk sense about keyboard induced pain"
for some background as to why these ergonomic keyboards are so
I also designed alternative symbols to the Micro$oft
Windoze and Menu keys so that one keyboard layout could be used
interchangeably for PC, Linux and Mac systems.
The Art of Sound Reproduction.
Audiophonics is my brand name for my audio design work.
Originally developed between 1992 and 1996 (Sphere Speakers, Bass
Speaker and the Zeus Audio Amplifier) I have continued to work on
refinements and improvements.
Please see my
website for further information.
Zeus Amplifier Schematic - 1994