Circuits & Schematics: metal detector - 4

31. Garage Door Opener Parts Form IR Intrusion Detector
    Circuits Security Texas Instruments LM555C
    .. Henscheid Electronic Design While creating an infrared beam intrusion detector system, the need for a beam-focusing method became evident. Parts from a modified Genie garage door ...
    21-12-2016

32. Low-component-count zero-crossing detector is low power
    Circuits Analogue Design Avago Technologies HCPL-4701
    .. be easily modified so that it produces a falling-edge waveform that is synchronized with V AC . Figure 1. The zero-crossing detector uses few components and consumes very little power. The V O signal has a rising edge that is coincident ...
    12-07-2017

33. Regulator IC forms convenient overvoltage detector
    Circuits Supply Texas Instruments TL431 TLV431
    .. Bell EDN Figure 1 shows a simple, stand-alone overvoltage detector. The intent of the circuit is to monitor a voltage, V MON , and set the output, V OUT , high when the ...
    07-11-2018
34. Make a truly linear RF-power detector
    Circuits Analogue Design Measurement Analog Devices AD633 AD707 AD8361
    .. dynamic range, but are not rms-responding. An alternative solution (Figure 1) uses the AD8361, a high-frequency true-power detector. Unlike the logarithmic amplifier, the AD8361 is an rms-to-dc converter and, therefore, responds to the ...
    13-09-2020
35. Sampling Peak Detector has Shutdown Feature
    Circuits Measurement Signal Processing, Filters Maxim MAX4231
    .. face a serious problem in using a slow ADC with a fast peak detector. The circuit in Figure 1 allows a slow ADC to measure a fast, sampled signal peak. The 100-MHz peak ...
    05-04-2022
36. Switched-gain op amp serves as phase detector or mixer
    Circuits Analogue Design Analog Devices AD8041
    .. multiplexing. In addition to this multiplexing, you can also use the disable function to configure the op amp as a phase detector or a frequency mixer. Figure 1 shows how the disable function can implement a low-frequency phase ...
    16-06-2022
37. Circuit Combines DC High-Voltage Drop Detector, Undervoltage Alarm
    Circuits Supply Texas Instruments LMC555
    .. that prevents the system from working properly, causing severe air pollution. Figure 1. As shown, the dc high-voltage drop detector/undervoltage alarm uses an LED for a visible indication, but the LMC555/TLC555 can also be connected to a ...
    12-07-2022
38. Circuit Forms Gamma-Photon Detector
    Circuits Measurement Maxim MAX4477 MAX987
    .. The most critical component is the PIN photodiode, whose selection often involves conflicting considerations. Detector sensitivity (the number of photons detected for a given radiation field), for example, depends on the ...
    18-07-2022
39. Wideband peak detector operates over wide input-frequency range
    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 ...
    14-09-2022
40. High-speed peak detector uses ECL comparator
    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. ...
    09-11-2022

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