Circuits & Schematics: metal detector - 5

41. Analog Peak Detector Frames Mechanical Bounce, Quantifies Contact Resistance
    Circuits Analogue Design Measurement Texas Instruments LF411 LM324 LM358
    .. subsided. The circuit of Figure 1 allows analysis of noise or mechanical bounce within time intervals set by a simple peak detector with an associated comparator. Switch-contact resistance then can be read automatically through the ...
    25-11-2022

42. AC Voltage Zero Cross Detector
    Circuits Supply Rohm BM2P129TF BM1Z102FJ
    .. V DC @ Maximum Load 100 mA PCB Dimensions 58.90 × 28.73 mm Schematic Figure 2. Schematic of the AC VOLTAGE ZERO CROSS DETECTOR. Connections Figure 3. Connections. Application circuit Figure 4. Typical application circuit. Waveforms ...
    30-11-2022

43. Zero-bias detector yields high sensitivity with nanopower consumption
    Circuits Wireless Analog Devices LTC1540
    .. battery life. A better method involves a technique borrowed from simple field-strength meters: a tuned circuit and a diode detector. Figure 1 shows the complete circuit, which was tested for proof-of-concept at 445 MHz. This circuit ...
    23-05-2023
44. A long pulse detector circuit
    Circuits Analogue Design Signal Processing, Filters Texas Instruments LM393
    .. longer than the set width are to be detected, ignoring the other short pulses. We are familiar with the missing pulse detector circuit, which detects the occurrence of a missing pulse in a pulse train where the pulses are of equal ...
    17-10-2023
45. Direction detector doubles as decoder
    Circuits Measurement Beginners Digital Texas Instruments CD4093B
    Fig 1’s circuit, which was developed to monitor the traffic of bumblebees into and out of the hive, differentiates “a-to-b” motion from “b-to-a” motion. When used with an optical decoder, the circuit distinguishes ...
    01-02-2024
46. Active Antialias Filter for 24-bit ADC Features Low Distortion, High SNR
    Circuits Analogue Design Audio Measurement Analog Devices LT6202 LTC2380-24 LTC6363 LTC6655
    .. since these components can add distortion. NP0 and silver-mica type dielectric capacitors have excellent linearity, and metal-film surface-mount resistors are much less susceptible than carbon surface-mount resistors to generating ...
    12-07-2020
47. Single-Chip Circuit Delivers Direction Information In Encoders
    Circuits Measurement Texas Instruments SN74HC14 SN74HC74
    .. a 4538 single-chip, dual monostable multivibrator. Depending on the speed required for the application, the IC could be a metal-gate device, a 74HC, or a 74HCT type. Figure 1. The direction discriminator circuit is based on a dual ...
    30-12-2019
48. Power supply +4.25 - 20V/15A and +1.25V - 12V/3A is based on application of National Semiconductor 3 voltage regulators LM338
    Circuits Supply National Semiconductor LM338
    .. and him replace with proportional value constant resistance. The Rectifier Bridge BR1 should be placed in some point of metal box so that it's frozen. On the contrary the IC1-2-3, that good are is TO-3 case, should be placed in a ...
    10-04-2005
49. Simple Fixture Determines Leakage of Capacitors and Semiconductor Switches
    Circuits Measurement Analog Devices AD8661 ADR391
    .. leads terminated with a gold-plated phosphorus-bronze pin can serve as a low-leakage switch. You can find gold-plated metal pieces in any type of high-quality connectors. Also, you can clip the DUT or CUT between two gold-plated clips ...
    28-07-2020
50. Thermocouple Temperature Meter
    Circuits Measurement Microcontrollers Usage
    .. between the two junctions and well proportional to the temperature. There are some type of combination of materials (pure metal or alloy) as industry standard for temperature sensor. The K-type (chromel - alumel) thermocouple is the ...
    26-11-2012

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