Circuits & Schematics: detector - 9

81. Color sensor achieves high dynamic range with auto exposure
    Circuits Measurement MCU Open-Source Platforms Light Arduino Hamamatsu S9032
    .. Gottardi EDN The Design Idea in Figure 1 is a color detector capable of generating an RGB triplet over a high dynamic range, a useful attribute for machine vision ...
    Jun 9, 2017

82. Interfacing Linear Sensors To An ADC Requires Only Basic Math
    Circuits Analogue Design Measurement Analog Devices OP177
    .. its linear performance with a sensor equation that’s typical of this type of semiconductor-based temperature detector: (2) where V T is the diode’s temperature-derived signal. By solving Equation 2 for the ...
    May 16, 2017

83. LED doubles as emitter and detector
    Circuits OSRAM SFH409
    Kyle Holland EDN Every junction diode exhibits some degree of photosensitivity when it receives light comprising an appropriate range of wavelengths. The spectral response of a junction diode depends on a variety of factors, including material ...
    Apr 5, 2017
84. Reset supervisor waits for stable supply
    Circuits Analogue Design Microcontrollers Usage Texas Instruments TLV3491
    Mike Mitchell EDN The power-up cycle of the supply voltage in embedded-system applications is sometimes not a clean event. This fact holds especially true in battery-operated systems, because the insertion of a battery often causes significant ...
    Mar 29, 2017
85. Garage Door Opener Parts Form IR Intrusion Detector
    Bert Henscheid
    Circuits Security Texas Instruments LM555C
    .. creating an infrared beam intrusion detector system, the need for a beam-focusing method became evident. Parts from a modified Genie garage door ...
    Dec 21, 2016
86. Inverted bipolar transistor doubles as a signal clamp
    Circuits Analogue Design Radio Fairchild 2N3904
    .. and, with 40 µA of base drive, the emitter, current is around 10 µA. This current is sufficient in most level-detector applications for which the ac input amplitude changes slowly. Figure 2. A logarithmic scale of the ...
    Dec 14, 2016
87. Instrumentation Amp Makes an Accurate Transimpedance Amp Too
    Stefano Salvatori
    Circuits Analogue Design Texas Instruments INA129 PGA204
    .. 2. Then, V BIAS can be applied to the IN(-) input of OA1 such that the same potential is virtually maintained by OA1 at the detector cathode. If the same voltage is applied to the IA’s REF input, Equation (1) still remains valid, ...
    Nov 3, 2016
88. Reduce relay coil current with a reset controller IC
    Circuits Analogue Design Power Microchip MCP101
    .. Baxter EDN This Design Idea shows how to use a 63¢ (Q=1) microprocessor reset voltage detector IC in a relay coil drive circuit to greatly reduce the coil’s hold-in current. When asked to ...
    Sep 6, 2016
89. Monitor Transformer Winding's Temperature Without A Sensor
    Louis Vlemincq
    Circuits Analogue Design Measurement
    .. techniques. Both signals are used by U1, which is connected as a full-wave synchronous demodulator. This detector cancels any dc error or offset accumulated during the signal processing, and it eliminates frequencies ...
    Sep 2, 2016
90. Locked-sync sine generator covers three decades with low distortion
    Alfredo Saab
    Circuits Oscillators NXP 74HC4046 74HC4060 MAX297
    .. NXP Semiconductors 74HC4046 , is a PLL (phase-locked loop) with a VCO (voltage-controlled oscillator) and a phase/frequency detector. It has three internal phase detectors, but this design uses the one with a frequency-capture range equal ...
    Aug 11, 2016

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