Circuits & Schematics: metal detector - 5

41. Wideband peak detector operates over wide input-frequency range
    Jim McLucas
    Circuits Analogue Design Measurement Texas Instruments LM6171 TL084
    .. Design Idea builds on a previous one ( Reference 1 ) to realize a precision peak detector with a bandwidth of 15 to 30 MHz or more, depending on the maximum input-signal level of your ...
    Sep 14, 2022

42. High-speed peak detector uses ECL comparator
    Lukasz Sliwczynski Przemyslaw Krehlik
    Circuits Analogue Design Measurement Signal Processing, Filters Maxim MAX9690
    .. electronics designers often use peak-detector circuit sin such applications as amplitude measurement, automatic gain control, and data regeneration. ...
    Nov 9, 2022

43. Analog Peak Detector Frames Mechanical Bounce, Quantifies Contact Resistance
    Dave Carty
    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 ...
    Nov 25, 2022
44. AC Voltage Zero Cross Detector
    Rajkumar Sharma
    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 ...
    Nov 30, 2022
45. Zero-bias detector yields high sensitivity with nanopower consumption
    Mitchell Lee
    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 ...
    May 23, 2023
46. A long pulse detector circuit
    Jayapal Ramalingam
    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 ...
    Oct 17, 2023
47. Direction detector doubles as decoder
    Tracy Allen
    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 ...
    Feb 1, 2024
48. Water-leak detector uses 9V batteries
    Yongping Xia
    Circuits Measurement Analog Devices MAX934
    .. voltage and, as such, it is not that convenient for many applications. This Design Idea describes a portable water-leak detector that uses a common 9 V battery for power (Figure 1). The circuit consumes less than 10 uA during ...
    Apr 18, 2025
49. 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 ...
    Jul 12, 2020
50. Single-Chip Circuit Delivers Direction Information In Encoders
    Guido Nopper
    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 ...
    Dec 30, 2019

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