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2
votes
2answers
95 views

Sensoring gokart pedals?

I want to make a ATMega-based module to record several parameters of a go-kart while driving - pedals position, speed of the wheels and g-forces. I have a problem with choosing how to measure gas and ...
3
votes
1answer
129 views

Miniature wireless distance sensor

I am novice in electronics, so please bear with me. I am searching for a small distance sensor (as small as possible) that I can use to measure a distance between 0 and 30 cm precisely (precision ...
0
votes
1answer
179 views

How can the signal strength of an RF signal be measured?

I am a graduating ECE student and we are currently making our project study. Our group would like to make a proximity indicator. Initially, we planned to use Radio Frequency for this. The idea was to ...
5
votes
2answers
602 views

How the time is converted into distance by multiplying it with 17,000

The general formula for Distance to Time conversion or vice versa is, Velocity = Distance / Time I have been implementing HCSR04 Distance Sensor, Datasheet: ...
-1
votes
1answer
159 views

Trying to figure out the distance my computer is from my Bluetooth peripheral via RSSI. Is it possible?

I'm having a great deal of trouble figuring it out. I know it's far from exact, but I would like to have a reasonable estimate in meters. Right now my device is reporting back to my the RSSI value ...
2
votes
1answer
211 views

How to collimate ultrasonc beam from proximity sensor HC-SR04 in measurng distances of 3 meters?

I am currently doing a project for bicycle overtaking safety in which an approaching vehicle or cycle from behind is found through ultrasonic sensor and indication is given to the rider. I had a ...
5
votes
1answer
111 views

Powering a modem over extreme distance (~2k feet)

We live in a rural area and have about a 2000 foot run from the end of our driveway to our house. The cable company wanted quite a bit of money to run internet to our house, but there's a drop at the ...
2
votes
2answers
250 views

Arduino Uno and Sonar Sensor - how long can the wire be before performance suffers?

I am setting up an Arduino Uno with a sonar sensor from Maxbotix (http://www.maxbotix.com/Ultrasonic_Sensors/MB7360.htm). The sensor will be powered directly from the Arduino (5V). The sensor needs ...
12
votes
3answers
1k views

Can an optical mouse be used to measure distance down to 1-10μm?

I am working on a home-built CNC machine that uses stepper motors and MXL timing belt for the machine movement. Because I'm using steppers, there is no feedback to the controller about the actual ...
0
votes
0answers
83 views

Measuring distance of two objects in short range

Is there a solution for measuring distances of two object in short range? Max 1 meter of distance needed. Accuracy is not an issue e.g. accuracy of 1-2cm would be good enough. Solution should of ...
9
votes
4answers
599 views

Why wavelength is not measured with a unit of time?

While learning Fourier transforms, I have this little doubt about wavelength. Why is that wavelength for a sine wave, or any other wave, is measured with a unit of distance? If it travels w.r.t. ...
7
votes
2answers
165 views

real time short distance range finder and visual output

I'm badly visually impared in one eye and find judging distances while walking downhill hard. My goal is to create a real time range finder than can display the distance of the next step(s) while at ...
0
votes
1answer
237 views

How to measure distance/position accurately?

I am wondering if there is a way to measure distance between two movable points (e.g., the first point is on the hand and the second point is on the back of the human body). I was looking at ...
6
votes
3answers
151 views

How can I electronically measure tilt/compression of a pliers or alligator-clip?

I would like to electronically measure the width (really the compression/extension) to which an object's constituent blades have been stretched. Or alternatively, I could measure some other parameter ...
0
votes
1answer
306 views

Problem with Arduino and 2 Sharp IR sensors

I have 1 Arduino and 2 IR Sharp GP2Y0A02YK0F proximity sensors, I connected 1 sensor, with mounted capacitors between GND and VCC (100nf, 10000nf) Everything is fine, I have good values, but when I ...
1
vote
2answers
112 views

Recommended Sensor? Distance - High Heat & Dusty

I'm after a sensor and I'm wondering what would be the best type for the following. Requirements - Accurately measure in the 5-10mm distance range, +/- 1mm. Sense small undulations in a surface ...
0
votes
1answer
105 views

Looking for a miniature low-power range detector for a robot

Sorry if I am not following guidelines. I am a noob trying to build a Robot for learning purposes - I want to play with navigation algorithms using particular measurements - distance to the obstacle ...
2
votes
3answers
200 views

Wireless communications for distance estimation (RFID perhaps?)

What I want to do it is measure the distance between two points/ devices which are constantly moving apart or together. The value for distance isn't really required I'd just be looking to have an ...
2
votes
4answers
1k views

Measuring Signal Strength with a RF Circuit

Note: I'm primarly a 4th year Computer Science student, but I have also interest in electronics but I have very limited knowlege. Is it possible to measure the signal quality or level of a RF ...
0
votes
1answer
286 views

Monitoring distance between two moving objects

For a new product, I'd like some help in understanding what technology would be best for creating a wireless connection between two moving devices and having them constantly monitor the distance ...
0
votes
2answers
247 views

SR04 As only Transmitter and Receiver

I have taken up a "follow me" robot as my course project ,i am taking the following approach: Use one SR04 ultrasonic transducer only as transmitter which will be with me. Another SR04 module only ...
1
vote
1answer
113 views

Tracking Flight of a Bee or a Wasp

I am planning to build a system that can track and present for me a path for the route a Bee or a Wasp has flown. What I am looking for is the tiny device can be placed on the back of an insect. Does ...
7
votes
1answer
982 views

Best Approach for Long-Distance Sensors

The Project So I have a project idea. (groan) I want to monitor multiple motion and/or ultrasonic sensors to build a simple proximity alert. I want to "deploy" sensors at key points along the ...
7
votes
3answers
690 views

What is the most accurate and cheap way to figure out the distance between two points electronically?

For a project, I have an idea that involves getting a position for a person throughout a house. I am trying to figure out someway of triangulating the person's position, by having a bunch of little ...
2
votes
4answers
329 views

Tracking pen within whiteboard surface

(Question in response to the comments.) I have a fixed flat white rectangular whiteboard of dimensions 1 meter by 0.5 meter and pen. I want to track the position of the tip of the pen within the ...
6
votes
2answers
506 views

Proximity sensor for height from snow covered ground

I will preface this by saying that I am a hobbyist not an engineer, which is probably why I even have to ask this question. Like the title says I want to know what type of sensor I can use to get the ...
2
votes
1answer
103 views

Measuring distance at angle

I have a question, I want to measure a distance from an object of unknown shape and material, and I want to measure it under different angles, I want to measure a distance to just one specific point ...
9
votes
4answers
713 views

Methods to accurately move an object across a 2-D plane

This is the opposite/complement of my previous question, which concerned measuring the precise position of an object as it is moved/drawn by someone over a short duration. Assuming I use one of ...
11
votes
7answers
2k views

Ideas to measure 2D position of an object constrained to X-Y plane

I am working on a project, and an aspect has come up where I would like to measure (track continuously) the X and Y position of an object across a 2D plane. The object is moved by a person, with the ...
4
votes
2answers
1k views

How do I properly use Sharp GP2Y0A21YK0F sensor?

I've recently obtained Sharp GP2Y0A21YK0F IR distance sensor and I'm not sure how to make a proper circuit for output measurement, since I'm getting lots of noise. The only thing datasheet mentions is ...
4
votes
3answers
603 views

Detecting the placement of my finger on an invisible grid

Yes, a similar question was asked before, but mine is different. Let me explain what I am thinking of. Suppose I have an invisible 3 x 3 grid on my desk, is there any way I can detect which square I ...
2
votes
2answers
127 views

Distance measurement to liquid plastic

What's the best way to find out how much plastic I got in a container? Characteristics: It's slimey It's liquid It's sticky Its electrical resistance is very very high It's very warm(250 degrees ...
0
votes
1answer
107 views

Arduino and Display in different rooms, possible?

I only wondering which four pins I have to connect for the LCD4884 from SainSmart, because I want to have Arduino and the LCD in different rooms. Is it possible?
3
votes
4answers
999 views

How to mesure distance between two objects?

I have some idea about make something and make some small production. Idea is to have something that measure distance between two objects. First one called A size doesn't matter, can be connected to ...
6
votes
2answers
2k views

I2C extender or repeater?

I am developing a dolly-pan-tilt system, where an Arduino is connected via I2C to three independent rotary encoders for positioning. Having read a few posts on this site and elsewhere, I am aware that ...
1
vote
3answers
595 views

Using Mic from 10 feet away for voice recognition

I'm trying to use a mic from 10 feet away. Background: for my senior project I would like to talk to a computer to run scripts, but I want to talk to the mic throughout the house. So I need to be ...
5
votes
5answers
7k views

Options for short range distance determination between two objects

I have a project idea in mind, but it involves calculating the distance between two people. I've looked into Bluetooth, RFID, and NFC (unsure about this one), but none appear to offer the accuracy I ...
0
votes
2answers
1k views

Distance between 2 arduino's using rf links

I currently have a setup where I send a char using a Tx of 434MHz and an Uno to a Mega with a Rx. The Mega counts how many times it receives the char and then if it falls below a certain number it ...
5
votes
2answers
9k views

rangefinder (very long range), ultrasonic or laser… for arduino?

I have a maxbotics Ez1 plugged to an arduino but i was wondering how to build a digital tape measure and to connect it to an arduino, for measuraments longer than 10 feet, maybe 20, 30 feet or ...
3
votes
1answer
468 views

Sensors to detect and measure movement

I would like to know which sensors should I use in order to get measurement of a movement of my device (slow speed movement on a 2D plane, in cm or mm if possible). The goal is to find out if the user ...
2
votes
3answers
413 views

Technology for precise distance measure?

I want to create a system that's able to scan the environment around him and create a depth image of what's around it, like this image, where the color lightness is inversly proportional to the object ...
3
votes
3answers
848 views

Building an outdoor WiFi connection

In Germany the wifi(5470-5725 MHz-Subband 2) maximum output power is 1000mW. I would like to buy a Airmax5 which has 200mW(23dbm) output power. In the Airmax5 there is 13dbi built in directional ...
4
votes
3answers
720 views

Alternate ways of measuring distance (lateral)?

I'm working on a micromouse, a small autonomous robot that traverses a maze. I need an efficient way to measure lateral distance to walls and I'm looking at the Sharp GP2D120 but looking at the ...
1
vote
2answers
212 views

Electronics for depth perception

What kind of electronics is need for depth perception of objects? I know that having 2 cameras is one method, but what about ultrasonic? Can I determine depth through that? In my project I am dealing ...
0
votes
2answers
283 views

Placing an ultrasonic sensor in a corrosive environment

A year or so ago I built a simple gauge for the fuel oil tank in my basement using a MaxSonar-EZ ultrasonic distance sensor. At some point, it stopped working, and when I removed it from the tank ...
1
vote
1answer
340 views

At DC frequency, how long can wire be until signal attenuates almost completely?

Just got curious about this last night when I was wiring a couple of LEDs on my brother's long board. For a simple DC circuit (Battery, resistor, LED), how long can I stretch the wire until the power ...
4
votes
2answers
1k views

Underwater Distance Sensing

I'm looking to measure distances from a submersed robotics project in the range of 1 to 20 feet (around there at least). However, the only options I seem to come across are rather heavy sonar modules ...
9
votes
7answers
1k views

How do I implement accurate distance measuring (to ground) on a plane-like UAV for heights over 10m?

How do I implement drone-to-ground distance-measuring for autopilot landings for heights over 10m? I found ultrasonic to be too inacurate, let alone GPS. Maximum height is 1000m, Vmax is 100 km/h, ...
2
votes
4answers
1k views

Using 38 KHz IR receivers to measure distance

Can I somehow use Vishay's TSOP series IR receivers and IR LEDs to measure the distance from an object? Has anyone done that before or has any idea how one could do it(clever programming or circuitry, ...
15
votes
3answers
2k views

Any published designs for time-of-flight laser distance measurement

Does anyone have any references/examples for detailed circuitry for time-of-flight laser distance measurements - schematics, appnotes etc.?