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Precision Analog Optocoupler

Function

An optocoupler is used to isolate a voltage source from the process (or experiment) by creating a optical link between the two using an LED-photodiode combination. A digital optocoupler can output only digital signals (high or low), while an analog optocoupler faithfully reproduces the input voltage into the same output voltage but now produced by an independent power source. This device provides good electrical isolation of the power source (typically, an analog output card of a computer) from potentially harmful processes that might occur on the experiment side (eg: voltage spikes during fast switching of magnetic fields).

The optocoupler circuit and the board is a replica of the circuit by Todd Meyrath which can be found here. The original board was designed using the layout software “pcb123”. Since the version is now obsolete, it has been remade by me using “Eagle” version 5.11.0. The schematic is identical to the original one and only the part labels are different. The board layout is similar except for minor adjustments. The complete documentation for the original circuit can be found on the above website and I am not including all the options here. All options mentioned in the documentation can be implemented by identifying the labels of respective components in the schematic.

Optionen und Alternativen

FIXME

Performance

FIXME

Date

Project date: August 2011

Status

FIXME Aufwand für Nachbau: FIXME

Developer

Hrishikesh Kelkar, kelkar@iqo.uni-hannover.de

Anwender

FIXME

Working principle

FIXME

Circuit diagram

Layout

Housing

FIXME

Test

FIXME

Bedienung

FIXME

Bilder

Kalkulation

FIXME

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R,C ??x 0.02 € 0.22 € Bauform 0805
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Meckerliste

Was für die nächste Version zu tun ist: (:no:: verworfen, :Ok:: in Arbeit, :ok:: im Schaltplan, aber noch nicht im Layout, :OK:: erledigt)