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--- project:ratbox:start [2016/11/25 07:45] – ↷ Page moved and renamed from project:ratbox to project:ratbox:start ruza
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 ====== Conditioning Chamber for Cognitive Experiments ======
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 name=Conditioning Chamber\\ for Cognitive Experiments|
 image=ratbox.jpg?200|
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 status=done|
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+~~META:
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 One of our guest speakers in 2010 was [[http://web.natur.cuni.cz/zoologie/eko/nekovarova.php|Phd. Tereza Nekovarova]], who works at the Laboratory of Neurophysiology of Memory, Institute of Physiology, [[http://www.cas.cz/index.html | Academy of Sciences of the Czech Republic]]. She asked us to repair the operant conditioning chamber for experiments regarding spatial cognitive abilities of rats.
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 ===== Wiring and Electronics =====
-The electronic parts of the chamber are positioned mostly on the right side of the front panel. Their task is to detect slot usage and control the feeder and door motors. The central control point is the [[project:brmduino|Brmduino]] board equipped with an ATMega328 microcontroller. The firmware accepts commands and reports status over USB. All the electronics is powered just by the USB port, no external power source is necessary.
+The electronic parts of the chamber are positioned mostly on the right side of the front panel. Their task is to detect slot usage and control the feeder and door motors. The central control point is the [[project:brmduino:start|Brmduino]] board equipped with an ATMega328 microcontroller. The firmware accepts commands and reports status over USB. All the electronics is powered just by the USB port, no external power source is necessary.
 The figure below describes the slot sensor and door control relay circuit. (Note that the physical layout of the components is different, this describes just the electrical circuit.)
-{{bio_boxsch2.png?400 }}
+{{..:bio_boxsch2.png?400 }}
 {{:project:potkanostroj.svg?800|}}
 ==== Slot Sensors ====
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 ===== History =====
-{{bio_box1.jpg?300}} {{:project:bio_boxc1.jpeg?300|}}
+{{..:bio_box1.jpg?300}} {{:project:bio_boxc1.jpeg?300|}}
 We have not created the chamber from scratch - originally, we have received an earlier version (the author is unknown to us) for repairs. After inspecting it and trying to reverse-engineer the circuits, we have decided to modernize and simplify both the mechanical and electronic parts. We have kept the original mechanical casing and the sliding door construction, but replaced the feeding dispenser motors and remade all the electronic circuits.
 We removed the four top motors (extracted probably from acu-drills) that determined the dispenser position and replaced them by servo motors - both the mechanics and the electrical control is simplified. The original setup was controlled through a serial port and a series of complicated electronic parts which we discarded in favor of a Brmduino. We have made a new board for the door control, but reused a relay from the original circuit and re-used the same principle.