Electronics related projects, information, and
& Computer Page
I just love a good well designed calculator, and have collected quite a few.
The only calculators that are any good in my opinion are Casio and Hewlett Packard.
Casio have set the standard in low cost functional direct algebraic calculators,
and HP of course have their feature packed, elegant, and classic Reverse Polish
Check out the HP Calculator Museum.
- Casio FX-61F
This is the calculator of choice for electronics work. If you
a lot of electronics math then you are doing yourself a disservice without
one of these!. The best thing about the 61F is the PARALLEL function key,
it just makes your life so much easier. The impedance keys are also worth
their weight in gold when you have to do a lot of repetitive impedance calculations.
Seperate Dec/Hex/Bin/Oct keys make base conversion easy.
- Tandy EC-4031
Most Tandy calculators are rebadged Casio's, and this one is similar
to the FX-100S. A really nice basic scientific calculator for general use.
Supurbly designed, with only a single LSI chip mounted directly onto a membrane
along with the keys and LCD.
- Casio CFX-400 Calculator Watch
This is an absolute classic!. A complete scientific calculator
with base conversion in a very compact fully functional watch. I wore one
of these for almost ten years before the band support broke off. I've never
been the same without it. It had a 16 key membrane type keypad with four functions
per key that looked like it wouldn't last 6 months, but I got ten years solid
use out of it, and it still works!. My fingers are just small enough
to allow me to operate each key without using a finger nail!.
One of the best examples of engineering I have ever seen. I have since sold
this to a collector.
- HP 28S
This classic calculator with 32KB of stack space and direct algebraic
or reverse polish notation was the best calculator in the world back
in 1986. Everything is treated as an object, and you can manipulate real numbers,
complex numbers, binary numbers, strings, vectors, and matrices with equal
ease. The Solver, Algebra, and Graph functions were radical inovations in
their day, and even today, the 28S is only purpassed by the upgraded HP48
The dual folding keyboard is also a masterpiece
- HP 42S
This is the upgraded model to the classic HP41C series. Less functionality
than the 28S, but in a much smaller package. HP's top of the range standard
- Check out my E²CALC Engineering Calculator
The best DOS palmtop on the market bar none!. Picked it up for next
to nothing from cash convertors in Adelaide
- Tandy 1000
The Tandy 1000 had such an impact on my life
that I run a Webring dedicated to it!
- Tandy 1100FD
This was a nice little XT notebook that was around before the
term notebook was even coined. It had MS-DOS and Deskmate software (with
spell checker) built into ROM, and used a lead acid battery. I customised
it with an additional internal lead acid battery without making any
modifications. I sold this many years ago, but still have the technical reference
manual for it.
- Tandy PC-8 Pocket Computer
A classic pocket computer with 2KB of RAM and inbuilt BASIC.
- IBM L40sx
A 20Mhz 386sx mono laptop with what is quite simply the best
keyboard ever made on a laptop or desktop!. Only has 2MB of RAM, but is still
really useful for long periods of typing due to the supurb keyboard. Also
has an IIT math co-processor, which were supurb 80-bit co-pro's that were
miles ahead of Intel in their day. The only thing wrong with this beauty was
the screen, which isn't exactly the best I have seen.
- Daewoo CPC7400S Notebook
20MB of RAM, STN colour VGA screen, 540MB HD, and 14k4 PCMCIA modem.
A supurb tiny notebook with the smallest mains power adapter available
at that time.
- Compaq Prosignia 320
My current machine - 196MB, DVD & burner, 17" monitor, ZIP
drive, and a 16MB nVida card. I'll never buy a no-name backyardy again!
- Standard Clone Desktop
A 486DX4/120 with 1.2GB hard drive, 16MB of RAM, and 2x CD-ROM.
This originally started out as a 386sx-20 with 2MB of RAM, but has been slowly
upgraded over the years.
- NEC APC4
A really bad machine that could barely call itself a PC clone.
Sold it many years ago for double what I paid for it - a sucker born every
- Dick Smith CAT Computer
A really flaky Apple 2 clone, but really fun to play with. Needed an
Apple emulator cartridge to make it more "compatible", done to overcome
copyright problems when selling the main machine - Ah, the good'ol days...
David L. Jones