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Related Concept Videos

Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
Operational Amplifiers01:17

Operational Amplifiers

The operational amplifier, often referred to as an op-amp, is a multifaceted building block of a circuit. This electronic component functions like a voltage-controlled voltage source and can also be used to create a voltage- or current-controlled current source. The design of an operational amplifier enables it to execute mathematical operations when external components like resistors and capacitors are linked to its terminals. An op-amp has the capacity to sum signals, amplify a signal,...
Working Principle of BJT01:15

Working Principle of BJT

A Bipolar Junction Transistor (BJT), specifically a PNP transistor in a common-base configuration, effectively amplifies or switches electronic signals by controlling the flow of charge carriers. This discussion focuses on its operation in the active mode.
In the PNP configuration, the emitter is heavily doped with positive charge carriers (holes), while the base is lightly doped with negative carriers (electrons). This setup allows for a forward bias across the emitter-base junction,...
Switching of BJT01:22

Switching of BJT

Switching behavior in Bipolar Junction Transistors (BJTs) is a fundamental aspect utilized in various electronic circuits, particularly for digital logic applications like switches and amplifiers. In a typical switching circuit, a BJT alternates between cut-off and saturation modes, corresponding to the "off" and "on" states, respectively, thus behaving like an ideal switch.
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are reverse-biased. The...
Bipolar Junction Transistor01:22

Bipolar Junction Transistor

Bipolar Junction Transistors (BJTs) are essential elements in electronic circuits, playing a crucial role in the functionality of amplifiers, memories, and microprocessors. These transistors can be designed as NPN or PNP based on their doping patterns. They consist of three layers: the emitter, base, and collector. The configuration of these layers and their respective doping levels—with N-type or P-type impurities—define the transistor's type and its operational characteristics.
The structure...
Tactile and Chemical Senses01:27

Tactile and Chemical Senses

Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex. This...

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A Method for Evaluating Timeliness and Accuracy of Volitional Motor Responses to Vibrotactile Stimuli
07:28

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Published on: August 2, 2016

A simple 2-transistor touch or lick detector circuit.

Burton Slotnick1

  • 1Department of Psychology, University of South Florida, Tampa, FL 33620, USA. slotnic@american.edu

Journal of the Experimental Analysis of Behavior
|October 2, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed an affordable, battery-powered circuit for rodent behavioral studies. This device functions as both a lickometer and a contact detector, simplifying data collection.

Keywords:
contact detectorlickometertouch circuit

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Area of Science:

  • Behavioral Neuroscience
  • Animal Behavior Research
  • Neuroscience Instrumentation

Background:

  • Behavioral studies in rodents often require specialized equipment for precise measurement.
  • Existing lickometers and contact detectors can be costly or complex to construct.
  • There is a need for accessible tools in rodent behavioral research.

Purpose of the Study:

  • To describe the construction of an inexpensive, battery-operated circuit.
  • To present a versatile device usable as a lickometer and contact detector.
  • To facilitate behavioral studies in rodents with accessible technology.

Main Methods:

  • The study details the design and assembly of a simple electronic circuit.
  • The circuit is powered by a battery for portability and ease of use.
  • Construction utilizes readily available and inexpensive components.

Main Results:

  • An easily constructed and inexpensive circuit was successfully developed.
  • The device functions effectively as a lickometer for measuring licking behavior.
  • The circuit also serves as a reliable contact detector for various applications.

Conclusions:

  • The described circuit offers a cost-effective solution for rodent behavioral research.
  • This accessible tool can enhance the capabilities of laboratories with limited budgets.
  • The device provides a practical method for monitoring rodent interactions and behaviors.