Questions tagged [tracking]

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7
votes
4answers
2k views

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?
7
votes
1answer
151 views

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 ...
3
votes
2answers
440 views

How to locate my cats in my house? [closed]

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 ...
2
votes
1answer
445 views

Opamp: capacitive loading when buffering a Reference

I need to drive a ratiometric current sensor ACS758xCB with a nominal supply current of 10mA. Due to the ratiometric nature of the sensor I would prefer to supply it from the reference voltage of my ...
2
votes
1answer
128 views

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 a LCD screen displays what is in each box ...
2
votes
1answer
525 views

How can I build a touchpad/trackpad? [closed]

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 ...
2
votes
0answers
71 views

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: $$\...
1
vote
0answers
34 views

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 ...
1
vote
2answers
257 views

What is the best way to track IR led?

I want to build an interactive whiteboard which uses an infrared ped. I want to use a camera to track IR position on the projection screen. I plan to keep the camera a little further away from the ...
0
votes
3answers
554 views

Using a Spectrum Analyzer to measure VSWR

I need to measure the VSWR of a coaxial wire that has a length of 100 metres and a characteristic impedance of 50 ohms using a Spectrum Analyzer (I don't have a Network Analyzer). I found this website:...
0
votes
2answers
315 views

Use of schottky diode and tracking peaks of input signal with capacitors

I am using this instructable to make a VU meter: http://www.instructables.com/id/Mini-Decibels-a-Simple-Volume-Meter-With-an-Electr/?ALLSTEPS I have two questions. What's the use of the Schottky ...
0
votes
3answers
330 views

Really small tracker using wifi only?

does anyone know if it is possible to buy or build a really small tracker that uses wifi only. I'm hoping to begin a masters studying bats, possibly in China, I expect in China the areas that the ...
0
votes
3answers
88 views

Which type of sensor for measuring height of horse step?

Is that possible? I'd like to track the amplitude of a horse leg/foot height for a show. The many many difficulties: constantly moving! So ultrasound way too slow the floor is irregular, made of ...
0
votes
1answer
48 views

Locating mobiles/UE by base stations in a cellular system [closed]

After understanding a bit about how actual cellular systems function, I realized that identifying the mobile/UE location is key in assigning the UE to correct base station and thus to guarantee a ...
0
votes
2answers
452 views

Choosing the right motor to control mirrors

I am developing a computer vision project which involves developing a system using mirrors for pan and tilt movement of the camera field of view. Mirrors are independent of each other regarding ...
0
votes
2answers
99 views

Dual power supply with BJT. How to do tracking without opamp?

I'm making a 0-±12V 20mA supply for breadboard. Circuit simulates fine with ltspice. How to implement tracking (or tracking ratio) WITHOUT opamp? I found a schematic here https://groenholdt.net/...
0
votes
1answer
36 views

Communication Technique used in Commercial Vehicle Tracking Systems

I am working on a vehicle tracking system that conveys the coordinates information from the vehicle to a server via GPRS communication. For this purpose I am using a GSM module with an arduino uno. As ...
0
votes
1answer
320 views

Object Recognition and tracking [closed]

I've been trying to make a butter passing bot, like the one from rick and morty. https://www.youtube.com/watch?v=X7HmltUWXgs I can do pretty much everything on there, but I need someone to help with ...
0
votes
1answer
428 views

What kind of start is good for GPS modules used in Tracking

I came across Cold start,Warm start and Hot start in GPS Modules while developing code for a GPRS Tracker. I know the difference between them. But when I use hot start method,signal is acquired faster ...
0
votes
1answer
239 views

Distance tracking underwater

For a design project at school I need a way to track a short distance underwater (swimming pool). I have looked into programming an accelerometer to measure the distance traveled, but that is not ...
0
votes
1answer
56 views

PCB trace width

I am trying to design a PCB circuit in altium designer. My circuit consists of one ATmega8a, one NRF24l01 and three magnetic relays (mini relay 12V MPR-S-112-A.) I want to set the trace width to 0....
0
votes
2answers
42 views

Restrict IR sensor field of view

I'm trying to develop a device that can detect or "watch" an infrared beacon that is freely moving side-to-side anywhere within a 180° field of view (-90° to +90°, with center/forward at 0°); i.e. the ...
0
votes
0answers
33 views

solar tracker slew drive end stop

I am designing a solar tracker and using a slew drive to rotate the panels from from east to west every day. Now, I would like to install a sensor that can be used to determine and calibrate the ...
0
votes
0answers
18 views

XBEE S3 PRO loses comms with another XBEE S3 PRO at anything beyond 800 meters even with a 7 dbi car antenna

I wanted to track a vehicle within a 15km radius. I am using XBEE S3 PRO connected with a car antenna with 7 dbi but it loses comms to another XBEE from point of origin in a distance of 800 meters ...
0
votes
1answer
33 views

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 ...
0
votes
1answer
53 views

Looking for a very precise tx/rx circuit module to calculate distance [closed]

Thanks for helping. I'm looking for a system that will help me find exact distance between a transmitter and receiver at a frequency of milli seconds, in distance accuracy of milli meters. I want to ...
0
votes
0answers
734 views

SIM800C - CME ERROR: 15 SIM wrong & CME ERROR: 10 SIM not inserted

I am making a GSM Tracker with SIM800C module. After deploying it into vehicles.. It works fine.. but after some days, it starts responding as CME ERROR: 15 SIM wrong for command AT+CPIN? & CME ...
0
votes
1answer
42 views

GPS start mode query

I am using SIM808 GPS/GSM module. I came across Cold start,Warm start and Hot start in GPS Modules while developing code for a GPRS Tracker for car. I know the difference between them.My question is ...
0
votes
1answer
37 views

3-axis solar tracker design

Is it possible to design a 3-axis solar tracker using three stepper motors just like dual-axis solar tracker in which we use two stepper motors one for elevation and one for azimuth?
0
votes
1answer
271 views

Desing Problem with Single Axis Solar Tracking System

I'm second year Electrical-Electronical Engineering student (It's Electrical Engineering basically but naming issues I guess) and my knowledge about circuits is limited to capacitors, inductors, ...
0
votes
1answer
289 views

A circuit to find 3D position of an object using changes in magnetic fields [closed]

There is a project at http://www.instructables.com/id/DIY-3D-Controller/ to make a DIY 3D controller with capacitors to infer the 3D position of the object being tracked (hand) without using any ...
-1
votes
1answer
371 views

Why do some GPS devices require a GSM SIM-card?

Why do GPS products like [Image A] always require a GSM (or similar; i.e. 3G, 4G, etc.) SIM-card?; Whereas typical in-car GPS navigation devices, etc. like [Image B] don't? [Image A] [Image B]
-2
votes
1answer
378 views

Why Altium designer autorouter making overlapped circuit track (error)?

I am using autoroute option in Altium designer (for only bottom layer), but in result I see some tracks overlapped to each other, as you can see in this photo: So I think when the Altium could not ...