Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [tracking]

45 questions
7
votes
4 answers

Are I/O buffers of ICs design to have 50ohm impedance?

Is it true that 50ohm characteristic impedance is a convention followed for signal carrying PCB tracks? Also, are the IC I/O buffers also designed to have a close to 50ohm impedance to match this?
quantum231
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1 answer

What is a Jaffe-Rechtin PLL?

Eberhardt Rechtin and Richard Jaffe (both involved in NASAs DSN) published this paper (paywalled) on PLL-design and -performance back in 1955. It is referenced quite often, so I wanted to understand what makes a "Jaffe-Rechtin"-loop or -filter. I…
Andreas
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1 answer

How can I build a touchpad/trackpad?

Every laptop has one - a touchpad/trackpad - for controlling the mouse. I'd like to build my own, external one. I've looked around and I cannot find a tutorial. I have come across 1 example where a webcam is used, but this is an optical touchpad,…
pookie
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3
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Constant(ish) distance between multiple objects

I’m working on a project where I need to be able to represent the positions of multiple, slow moving objects (between 5 and 30) on an X/Y plane (with a size of about 25m X 25m) in an outdoor environment, subject to weather conditions and consistent,…
Mach1Dagger
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3
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3 answers

Best way to track light source?

I want to build a 1-D (azimuth), bidirectional optical tracker. The idea is to have two identical transceiver, mounted on DC servo-motor. The user can move the two servos on rails (reasonably fast), while the servos have to automatically adjust…
Gab
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3
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2 answers

How to locate my cats in my house?

I have two cats and want to track in which of the 6 rooms of my flat (about 96 square meters) they currently are. Later I would like to trigger an alarm if they get into a "forbidden" room. The cats are currently not wearing a collar, but I tried it…
muffel
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2
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1 answer

Combining solar panel strings with different azimuth

When combining strings with a different azimuth in an off grid system, lets say NNE facing with North Facing and NNW facing (Southern Hemisphere), you catch the morning and evening sun better, this is called "Virtual Tracking" where fixed panels can…
user207364
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2 answers

Alternative wireless technology for passive RFID tags

I am working on a project where I have 3 boxes and a RFID reader (MFRC522) attached at the bottom of each box. I keep my wallet/keys/etc. in these boxes and an LCD screen displays what is in each box by reading the RFID tag on the…
Prakhar Pradeep
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2
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0 answers

tracking error state space, linear control example

I am trying to understand a detail from an example, from the control textbook Slotine and Li (1991) "Applied Nonlinear Control", Prentice-Hall, Example 6.4, pag. 220. A linear system is given: $$\eqalign{ \left[ {\matrix{ {{{\dot x}_1}} \cr…
Lello
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1 answer

Op amp capacitive loading when buffering a reference

I need to drive a ratiometric current sensor ACS758xCB with a nominal supply current of 10 mA. Due to the ratiometric nature of the sensor I would prefer to supply it from the reference voltage of my ADC. Obviously I need to buffer the…
Arne
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Designing dual tracking regulator low noise PSU

I want to design a power supply with the following constraints Inputs 19 V - 0 - 19 V secondary & 9.5 V secondary - A transformer I have ready for the project, primary 230V . Output +15 & -15 V, +5 V. Imax 350 mA on all rails. Parameters are low…
ahmod3
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Sensor to detect movement of object on a horizontal wire

I am looking on how to build a solution to track movement of an item clipped to a horizontal wire. It has been suggested I could do with with an accelerometer and Arduino. I want to detect any movement, whether the object is rattled or slid. If…
lintunen
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1 answer

PSU Series and Parallel Tracking Mode, Current Limit Behavior

I'm designing a training course for use of the electronics lab equipment at the local makerspace. We have a HY3005F-3 dual-channel DC power supply, and I scanned and posted the manual here. I'm writing up instructions on how to use it, and I'm a bit…
vicatcu
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Choosing a stepper for antenna tracking system

I am building a prototype for an antenna tracking system. The following animation will make it slightly easier to understand what I have in mind: https://youtu.be/DZ0LRf6_Zew The two antennas are: https://www.wimo.com/xquad-antennas_e.html 2.3kg…
Alessio Sangalli
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3-phase BLDC motor resolver problem

I am trying to drive a 3-phase BLDC motor with FOC and have some questions about obtaining resolver offset angle. In the driver I used ABC notation for phases and FOC accepts A phase as 0 angle electrical. The motor cabling uses UVW notation. The…
felvan
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