OH-HP 30S overhead projector calculator

[Martin Hepperle]

There seem to be plenty of Casio, TI and Sharp calculator models in overhead projector versions. These are probably more or less phased out now as overhead projectors have become a thing of the past.

Some of them are connected to special enlarged display units which are then put on the projector.
Others are simply built from transparent parts (using their standard LCD display without reflecting back and transparent keys) and have to be placed directly on the projector.

Examples (see https://www.dynatech.de/catalogsearch/re...q=overhead in German):
Casio OH-82 Super
Casio OH-300 ES PLUS
Casio OH-300 ES (FX-82 ES/ FX-350 ES/FX-85 ES/FX-115 ES, FX-991)
Casio OH-9860 (overhead display for FX-9860G/FX- 9860G SD)
Casio VI-9850 G Plus TV/Video (has an analog composite video output for connecting a color monitor - rather poor output quality)

TI-OHD 30 X II
TI-OHD 30 X MultiView
TI-OHD 30 X
TI-OHD 106
TI-OHD 34 MultiView
TI-OHD Math Explorer
TI-Nspire VSH ViewScreen (overhead-display with USB-Schnittstelle for Nspire)

Sharp OH-531 W (EL-531 WH / EL-531)
Sharp OH-W531 (EL-W531G / EL-W531H)
Sharp OH-520 VA (EL-520 VA)
Sharp OH-509 RT (EL-531 RH)
Sharp OH-520 W/WG (EL-520 WG)
Casio OH-82 (FX-82 SX)
Sharp OH-531 V (EL-531 VH/ EL-531 V BK)

Martin