Most of the Remote control systems use TSOP 1738 IR Sensor module to control various functions. This IR Sensor is highly sensitive and may damage easily, if is supply voltage increases above 6 volts. This tester is useful to check the working of the IR Sensor. It gives audio-visual indications when the IR sensor is working properly.
TSOP 1738 is designed to sense 38 kHz pulsed infrared rays used in remote handsets.
The IR Sensor has a PN photodiode and a preamplifier stage encased in an epoxy case. The case acts a filter and allows only IR rays to pass through it. The sensor is equipped with an AGC, band pass filter, a demodulator and a control circuit. The output of the sensor has a bipolar transistor with 80-100 K resistor in its collector. The output gives 5 volts at 5 mA current in the standby mode and the output sinks current when the sensor gets pulsed IR Rays. This sensor is capable of continuous data transmission up to2400 bps or more. The band pass filter and AGC circuits suppress unexpected noise to prevent false triggering. The sensor responds to the IR rays only if the carrier frequencyis close to the centre frequency of the band pass filter.
Fig. 1: Image of TSOP 1738 IR Sensor
The IR Sensor tester is powered by two 3 volts lithium cells. The sensor module is tested using the Test socket. Alternately you can use 3 mini alligator clips for on board testing. When the switch S1 is turned on, LED and buzzer remains off, if the IR sensor is good. When the remote handset is focused on to the sensor, and any of the buttons is pressed, LED blinks in sympathy with the pulsed IR rays and buzzer beeps. This indicates that the sensor is good.
A good sensor will give high output when it is not receiving IR rays. This high output makes the cathode of LED and the negative of buzzer high and they remain off. When the output of the sensor turns low by receiving the IR rays, LED and buzzer turns on.
Fig. 2: Image of a Button Cell Battery
Use a 3-12 volt mini buzzer and 3 mm LED to make the gadget compact. It can be enclosed in a small case.
Audio Visual IR Sensor Tester. (n.d.). UniTopics. https://www.unitopics.com/project/material/audio-visual-ir-sensor-tester/
“Audio Visual IR Sensor Tester.” UniTopics, https://www.unitopics.com/project/material/audio-visual-ir-sensor-tester/. Accessed 22 November 2024.
“Audio Visual IR Sensor Tester.” UniTopics, Accessed November 22, 2024. https://www.unitopics.com/project/material/audio-visual-ir-sensor-tester/
Here’s a typical structure for Audio Visual IR Sensor Tester research projects:
- The title page of Audio Visual IR Sensor Tester should include the project title, your name, institution, and date.
- The abstract of Audio Visual IR Sensor Tester should be a summary of around 150-250 words and should highlight the main objectives, methods, results, and conclusions.
- The introduction of Audio Visual IR Sensor Tester should provide the background information, outline the research problem, and state the objectives and significance of the study.
- Review existing research related to Audio Visual IR Sensor Tester, identifying gaps the study aims to fill.
- The methodology section of Audio Visual IR Sensor Tester should describe the research design, data collection methods, and analytical techniques used.
- Present the findings of the Audio Visual IR Sensor Tester research study using tables, charts, and graphs to illustrate key points.
- Interpret Audio Visual IR Sensor Tester results, discussing their implications, limitations, and potential areas for future research.
- Summarize the main findings of the Audio Visual IR Sensor Tester study and restate its significance.
- List all the sources you cited in Audio Visual IR Sensor Tester project, following a specific citation style (e.g., APA, MLA, Chicago).