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- Title
Development of OPTO-LDR coupled timer based voltage to frequency converter.
- Authors
Kumar, Akash; Debnath, Anindya; Banik, Antar; Mondal, Kabirul Islam; Biswas, Partha Pratim; Bhattacharyya, Rik; Maiti, T. K.
- Abstract
This paper describes the development of a timer based voltage to frequency converter (VFC)t Timer LM555 is used in astable multivibrator mode with two OPTO-LDRs (light dependent resistors) in the circuitry. The frequency of timer output waveform which is measured using a digital storage oscillator (DSO) is almost linearly proportional to the applied input voltage. Hence we obtain a linear relationship between the frequency of timer output waveform and the input voltage. Because of its quasi-digital output,the main advantages of this developed converter are linear input-output relationship, small size,easy portability and high cost performance. In addition, the timer output waveform can be directly interfaced with personal computer or microprocessor/microcontroller for further processing of the input voltage signal without intervening any analog-to-digital converter (ADC).
- Subjects
VOLTAGE-frequency converters; MULTIVIBRATORS; ANALOG-to-digital converters
- Publication
Journal of Measurement Science & Instrumentation, 2017, Vol 8, Issue 1, p17
- ISSN
1674-8042
- Publication type
Article
- DOI
10.3969/j.issn.1674-8042.2017.01.003