Here you can find descriptions of some little projects like a small photoplethysmograph, a true random number generator, seismometers and things like that.
Since being a child I have dreamed about having my own atomic clock - not necessarily a cesium primary standard, but maybe a rubidium oscillator controlled device. This dream has now come true! :-)
A small, Perl based, stack oriented array language called 5. This language combines the main aspects of Forth and APL and is easily portable as well as quite powerful.
A new 16 bit processor architecture featuring 2056 registers (a bank consisting of 256 times 8 registers and 8 fixed registers), a very (!) orthogonal instruction set and four condition bit controllable branch and subroutine call instructions.
Restoring an HP 41C programmable pocket calculator
Restoring an HP 67 programmable pocket calculator
A simple TTL modulated diode laser
A random noise filter
A control stick adapter
Restoration of an OMS 811 oscilloscope.
A four channel X/Y oscilloscope multiplexer.
Dragontalk - a simple Speech Synthesizer (not only for OpenVMS systems).
An active DCF77 antenna.
A simple power supply for a HeNe laser tube.
The NICE pages.
A three channel geophone amplifier
A high resolution flux gate magnetometer
A precision timing source for synchronizing AD converters, etc.
A simple short period vertical seismometer.
An eight channel AD converter.
A simple Lehman type seismometer and Some seismic events.
Current plots (updated every hour) and Complete daily plots of the long period sensor are hosted on FAFNER.
A high performance amplifier for seismic applications.
A simple power supply for the seismic amplifier.
How to convert a DECserver 200 into a MIDIserver 200 and control MIDI-instruments from a VAX running VMS, using QIOs. :-)
A simple but very useable photo plethysmograph for bio-physiological experiments.
A random number generator using a thorium radiation source.
10-JUL-2010
ulmann@vaxman.de
webmaster@vaxman.de
