= NEW GUIDE =

https://wiki.bcs.rochester.edu/ApLab/DPI%20Photodiode

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== Photodiode ==
This remade photodiode operates exactly the same as the old one, but with the added feature of adjustable sensitivity.


=== Circuit layout ===

{{attachment:circuit_layout.jpg|ciruit layout|width=512}}

=== Adjusting Sensitivity ===

Move the jumper (the removable red object near the bottom-right of the board) to a different set of pins to the left or right.

There are 4 gain settings on this board. With increasing resistance corresponding to an increase in gain

1. 0 Ohm (gain=1)

2. 5.7M Ohm

3. 10M Ohm

4. 20M Ohm

So far, we've found 10M Ohm to be acceptable for our purposes


{{attachment:board_layout.jpg|board layout|width=512}}

=== Photodiode Mount ===
The CAD file for the monitor mount is here:

{{attachment:mount_render.png}}


[[attachment:photodiode_monitor_mount.step]]


== Instructions to use photodiode with LabJack ADC board: ==

Scan Rate: 1024 Hz
Number of scans: 2048

[[attachment:LabJack_photodiode.pdf|Instructions]]