Using an Ammeter to Measure Illumination of a Photodiode - Step-by-Step Guide

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Homework Help Overview

The discussion revolves around using an ammeter to measure the illumination of a photodiode, focusing on the connections and relationships between current and light intensity. The subject area includes electronics and photonics.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the connection setup for the ammeter and photodiode, with one participant requesting a diagram for clarity. There are mentions of using more complex circuits involving operational amplifiers.

Discussion Status

The discussion is ongoing, with participants expressing concerns about pending attachments and the need for moderator approval. There is no explicit consensus on the necessity of a circuit diagram, as opinions vary on its importance.

Contextual Notes

Participants are awaiting moderator approval for an attachment that may contain relevant information. There is a mention of potential complexity in circuit design, indicating varying levels of familiarity with the topic.

einstein2603
As berkeman has already said you can use an ammeter. Basically, you need to connect the positive lead from your ammeter to the cathode of the photodiode and the Earth or negative lead to the anode of the photodiode. This will allow you to measure the rate of flow of electrons, which is proportional to the illuminiation of the photodiode (and dependent on the wavelength of light). If you plot current against distance from source, you should be able to determine a relationship between the two variables.

Hoot, this was from another thread. I know this sounds stupid, but could you draw the diagram.
 
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More complex circuits, using the Op-amps we discussed can be found on the internet.

Regards,
~Hoot
 

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why is the attachment pending??
 
It has to be looked at by moderators to see if its content is suitable for the site. It will be available once they've done so.
 
come on moderators. approve it already
 
einstein2603 said:
come on moderators. approve it already

Patients is a virtue einstein. Anyway I can't see how a circuit diagram is nesscary. It's obvious what the circuit will look like.
 

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