printed-circuit boards designed by me
| what
| when
| parameters
| in service life
| images
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| custom built pre-amplifier and A/D converter for pgII gonio-photometer,
| 2008-
| modular, > 7 decades, digital output
back doing the PCB layout myself on Linux
| 2+ years at pab-opto and two research labs
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| pre-amplifier for pgII gonio-photometer
| 2005-2007
| 4 channels, 7 decades, analog output
circuit design by pab, external PCB layout
| 2+ years at pab-opto and in productive industrial use
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| analog/digital input module for an Eltec SAC700 board
| January 1991
| 4x 12bit, 12bit parallel out
HP's electronic CAD program "DCS" at FhG-ISE, SMD bus driver components, PAL address decoding
| 12 years at FhG-ISE
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| digital opto-coupler board
| August 1989
| de-coupled all I/O signals to pg1 gonio-photometer
done with my own small X11 layout program, since I found hand-drawing dual-layer PCBs a bit tedious
| 12 years at FhG-ISE
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| dual logic and power control for 5-phase stepper motor
| January 1989
| 40V DC, 6A , 5x Siemens TCA1561 PWM power chips, interlaced chopped
hand-made PCB layout, photographically reduced on Lith film,
Eprom based stepper logic, manufacture of dual-side PCB by Bernhard Tritsch
| 14 years at FhG-ISE, main drives at photo-goniometer pg1
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| optocoupler with TTL Schmitt-Trigger
| January 1989
| 4x 24V DC in
| 14 years at FhG-ISE
input signals at photo-goniometer pg1
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| photo interrupter with TTL Schmitt-Trigger
| January 1989
| 4x TTL_out
| 14 years at FhG-ISE
reference position sensors at photo-goniometer pg1
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| pab "quadro-serial" card for Apple ][
| April 1987
| 4x RS232,
allowed more serial connections in a slot-limited Apple-2,
hand-made PCB layout, photographically reduced on Lith film,
manufacture of dual-side PCB by Bernhard Tritsch,
cold-contacts by Genswein GmbH, all Freiburg
| multiple years at FhG-ISE (Antonio Pflüger's "k-Wert")
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