China
Africa
Explore chapters and articles related to this topic
DC circuits
Published in Charlie Cullen, Learn Audio Electronics with Arduino, 2020
Voltage dividers are used widely throughout electronics in both analogue and digital systems. We will learn how to use voltage dividers in DC circuits in this chapter and later in AC circuits as filters (where we replace a resistor with a frequency-dependent capacitor). We will also learn how to use a voltage divider as feedback to control operational amplifier gain, and to help explain the practicalities of source and load in terms of amplifier input and output. In addition, a potentiometer (variable resistor) is commonly used as a voltage divider in audio circuits to control parameters like gain (amplifier input), volume (amplifier output) and equalization (filter balance). Now we have covered series circuits, we can move on to learning Kirchoff’s Current Law (KCL) and how this applies to parallel circuit analysis.
Controls and transducers
Published in David Wyatt, Mike Tooley, Aircraft Electrical and Electronic Systems, 2018
A potentiometer (often called a 'pot' for short) is a type of variable resistor that is normally used as a voltage divider; this is a circuit used to supply a portion of the power supply voltage from a resistive contact. The potentiometer is typically a three-terminal resistor with a sliding centre contact (the wiper). If all three terminals are used, it can be used in the voltage divider application. If only two terminals are used (one end of the resistor and the wiper), it acts as a variable resistor.
Stereo
Published in Michael Talbot-Smith, Sound Engineering Explained, 2012
Broadly there are two techniques, although in practice their usage often overlaps. These are: Using a pair of directional microphones very close together. They are angled symmetrically about an imaginary line which points to the centre of the recording area. Figure 7.1 shows two cardioid microphones positioned in this way. A pair of microphones with the diaphragms as close together as possible form what is known as a coincident pair.If sounds arrive from directly in front of the two microphones – 0° in the diagram – then both microphones will receive the same sound levels and the outputs will be exactly equal. (It is very important that the two microphones are closely matched in performance. The same is also true of loudspeakers in stereo.)A sound arriving off the centre axis of the microphones, say from X in the diagram, will result in a larger output from the right-hand microphone than from the left-hand one and this then gives us the required inter-channel difference. Purely electrical methods. Figure 7.2 shows in simplified form what is termed a panpot (from ‘panoramic potentiometer’). A potentiometer is a variable electrical resistance with three terminals. Two are at the ends of a resistive track, while the third is connected to a slider whose position along the track may be varied by means of a knob.
Monitoring soil water content and its salinity with high-precision and low-cost in-situ sensors
Published in European Journal of Environmental and Civil Engineering, 2023
Xavier Chavanne, Jean-Pierre Frangi
A 100 potentiometer added in series with a 100 resistor constitutes Potentiometer is adjusted to offset phase error of each bridge branch. Capacitance is usually 330 pF. As the quantity is larger than 5, is approximated in first order by the last expression in Equation (6). Its amplitude is close to one while its angle matches to after adjustment. Its tangent is
Real-time monitoring of battery state of charge using artificial neural networks
Published in International Journal of Ambient Energy, 2022
Sai Vasudeva Bhagavatula, Venkata Rupesh Bharadwaj Yellamraju, Karthik Chandra Eltem, P. N. Shashank, Phaneendra Babu Bobba, Satyanarayana Kosaraju, Naveen Kumar Marati
In the breadboard implementation, we have used a potentiometer circuit for the voltage divider so as to measure the voltage of the battery. The battery is connected to the voltage divider in parallel and the output of the voltage divider that is the scaled voltage is connected to one of the 16-bit ADC (ADS1115) channels for testing A single current as mentioned sensor is used for measuring the total current that is discharged by the ESU; in our case, we tested our equipment for a 12 V battery. The current sensor is then connected to a power resistor in series for identifying the instrumentation error in the current sensor and its working. An LM35 temperature sensor is being used for the ambient temperature. The current and ambient temperature measurements are also connected to the rest of the channels of the 16-bit ADC. The hardware breadboard circuit was successfully monitoring the values along with the date and time stamps at every log as seen in the display; the logged data is also stored as a CSV file for the future work in the project. So, by the breadboard basic implementation, we have validated our instruments working and our basic circuit for logging the parameters.
Increased foot-stretcher height improves rowing performance: evidence from biomechanical perspectives on water
Published in Sports Biomechanics, 2020
Yang Liu, Binghong Gao, Jiru Li, Zuchang Ma, Yining Sun
An instrumented single scull (Wudi, China) was used. Both gate force and angle in the horizontal plane were collected using specially designed gate sensor (Figure 3) that has a mechanical structure and measurement method very similar to the ROWX system (Webasport, Austria). These specially designed gate sensors completely replaced the original gate and allowed adjustment of gate height and blade pitch to ensure the same rigging set-up with the original gate, thus, eliminating the impact of rigging. Four strain gauges (1 KΩ, Beng Bu Zhong Chen Co. Ltd, AnHui Province, China) were glued to the pin and formed a Wheatstone bridge. Gate angles were collected via a servo potentiometer (5 KΩ, FCP12AC, 0.25% lineartiy, Sakae, Japan). The location of sliding seat was measured using a compact string potentiometer with voltage divider output (SP1-50, Celesco, USA). Boat velocity was measured using an impeller (Nielsen Kellermann) with embedded magnets, mounted underneath the hull of the boat. Boat acceleration in the direction of fore-aft direction was measured using an accelerometer (ADXL105, Analogue Devices, USA).