Circuits & Schematics: metal detector - 10
Search for: "metal detector"
- .. is a moving average filter which acts as a low pass filter to remove transients before the signal is input to the beat detector. The waveform after each of this filters can be displayed, however, in general the unaveraged waveform is ...15-04-2020
- .. 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
- .. Wynne EDN In applications in which you need remote measurement of temperature with a three-wire RTD (resistance-temperature detector), it is important to eliminate the ohmic errors caused by the excitation current flowing through the ...12-12-2019
- .. wave; thus, a filter can remove optical noise. You normally need filtering when light shines through fans onto the optical detector. When required, you can place a bandpass filter in series with Q 3 's output. Figure 1. An oscillator ...08-11-2019
- .. is to automate the process of measuring the amplitude of vibrations of the working end of the sonotrode in an ultrasonic metal welding system. During ultrasonic welding, the sonotrode oscillates at a frequency of about 20 kHz and with ...25-07-2019
- .. during the sensor off periods. In this example, a solar cell and a one-farad capacitor are used to power a remote motion-detector that uses an RF link to transmit the occurrence of any moment to a central monitor. This type of sensor ...29-04-2019
- .. increasing minimum on- and off-times, and requiring a large solution. Alternative solutions such as an EMI filter or metal shielding add significant costs in required board space, components, and assembly, while complicating thermal ...18-04-2019
- .. results. If necessary, you can compensate the temperature coefficient of the capacitor with a combination of NTC, PTC, and metal-film resistors for R 1 . For measurements, this design uses a simple metal-film resistor. The capacitance ...29-01-2019
- .. on- and off-times and larger solution size. Alternative mitigation techniques, such as a complicated bulky EMI filter or metal shielding, add significant costs in board space, components and assembly, while complicating thermal management ...14-01-2019
- .. because the IF signal is centered on 70 kHz. The voltage at Pin 12 is dc-coupled to an amplifier, IC 2 . Next, an envelope detector, IC 3 , yields a dc voltage proportional to the received-signal strength. The TCA965 window ...13-12-2018
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