BibSonomy bookmarks for /tag/sensor

Garage Door Safety Sensor Alignment and Replacement: A Practical Reference

absolutegarage — 2026-09-23T19:03:41+02:00

A field reference on photo-eye safety sensors in residential garage door systems — the paired infrared units mounted near the base of each track that halt and reverse a closing door when the beam is interrupted. Background. Auto-reverse sensing has been mandatory on residential openers manufactured in the United States since 1993, following consumer safety regulation targeting entrapment injuries. The system relies on a continuous infrared beam between a transmitter and receiver positioned no more than six inches above the floor. Common failure modes. Beam obstruction from dust, cobwebs, or debris on the lens; bracket displacement from physical impact, where a deviation of only a few degrees breaks alignment; wiring faults from staple pinching or rodent damage; moisture ingress into the housing in wet climates; and photo-diode degradation over time. Diagnostic sequence. Inspect indicator LEDs — one unit should show steady illumination on each side. A dark or flickering light indicates loss of pairing. Clean both lenses, clear the doorway, then loosen the mounting bracket and adjust until both indicators are solid. Persistent failure after alignment points to a wiring break or a failed unit requiring replacement. Note on practice. Bypassing or taping over sensors defeats the entrapment protection the system exists to provide and should not be used as a workaround. Applied service context: garage door sensor repair and replacement in Puyallup.

An Event-Streaming Architecture for Machine Learning in Dynamic Sensor Landscapes

scch — 2026-08-04T11:52:02+02:00

https://www.sciencedirect.com/science/article/pii/S1877050926002292

A Pilot Study of Smart Agricultural Irrigation Using UAVs and IoT-Based Cloud System

chehatmed — 2026-05-04T10:47:44+02:00

This study presents a smart irrigation system that integrates IoT, cloud computing, and unmanned aerial vehicles (UAVs) to improve water management in agriculture. The system uses sensors to collect environmental data such as soil moisture, temperature, and humidity, while a drone gathers this data from different field regions and sends it to the cloud for analysis. Based on this information, irrigation decisions are made automatically and monitored through a mobile application. The proposed system helps reduce water waste and supports efficient and sustainable farming practices

Buy dht11 temperature and humidity Sensor at Low Cost in Ainow

ainow — 2024-06-21T08:04:20+02:00

Find the best cost on dht11 temperature and humidity sensor in India. Shop now at Ainow for low prices on high-quality products for your electronics projects.

Buy ultrasonic sensor Module at Affordable Price in Ainow

ainow — 2024-06-20T07:50:17+02:00

Find the best cost on ultrasonic sensor module in India. Shop now at Ainow for low prices on high-quality products for your electronics projects

Many indoor air quality sensor products are a scam | Hacker News

bshanks — 2022-10-02T06:31:17+02:00

https://news.ycombinator.com/item?id=33025995

Many indoor air quality sensor products are a scam (temperature, humidity, pressure, CO2, TVOC)

bshanks — 2022-10-02T06:31:04+02:00

https://halestrom.net/darksleep/blog/048_indoorairsensing/

The Key to Armenia’s Tank Losses: The Sensors, Not the Shooters | RUSI

grundlagen — 2020-10-28T10:31:26+01:00

Despite the heavy Armenian armoured losses, the key lessons from the videos Azerbaijan has published online are not about armour. Rather, they reflect how the density of sensors on the modern battlefield is changing the balance in combined arms warfare.

Sensor with 100,000 times higher sensitivity could bolster thermal imaging

grundlagen — 2020-10-02T11:46:58+02:00

https://www.army.mil/article-amp/239559/sensor_with_100000_times_higher_sensitivity_could_bolster_thermal_imaging#click=https://t.co/o7Nsj1itvM

U.S. Army partners with U.K. to automate sensor data and information processing

grundlagen — 2020-09-17T23:03:37+02:00

https://www.army.mil/article-amp/239082/u_s_army_partners_with_u_k_to_automate_sensor_data_and_information_processing#click=https://t.co/WAy6S8gDdx

How to Measure Indoor Air Quality with a Raspberry Pi, RuuviTags and PMS7003 | Hacker News

bshanks — 2019-08-09T09:18:30+02:00

https://news.ycombinator.com/item?id=20640114

senseBox | Die Kiste mit Sinn

becker — 2018-11-14T12:12:03+01:00

https://sensebox.de/

Frackbox Hardware | Citizen Sense

lautenschlager — 2018-11-06T15:21:00+01:00

https://citizensense.net/kits/frackbox-hardware/

Mobile meteorology: smartphone batteries will change the way we measure the weather - OpenSignal

becker — 2018-10-08T12:27:05+02:00

https://opensignal.com/reports/battery-temperature-weather/

StephensApiary

hotho — 2018-08-22T20:15:49+02:00

http://www.stephensapiary.com/

Sensor de Nível de Líquidos Sem Contato - XKC-Y25-V - Usinainfo

christianoavila — 2018-08-07T20:28:32+02:00

Compre Sensor de Nível de Líquidos Sem Contato - XKC-Y25-V na Usinainfo com as melhores condições. Aproveite e compre o seu!

openSenseMap

achakraborty — 2018-06-18T08:44:27+02:00

OpenSenseMap is a platform for publishing and visualizing environmental sensor data.

Stickstoffdioxid

becker — 2018-04-11T10:18:23+02:00

https://www.umweltbundesamt.de/sites/default/files/medien/pdfs/Stickstoffdioxid.pdf

Sensor de umidade do solo com Arduino - Higrômetro - Portal VDS

christianoavila — 2017-12-27T14:56:34+01:00

Neste tutorial aprenderemos como usar o sensor de umidade do solo, chamado também por Higrômetro, com um Arduino Nano para monitorar a umidade do solo.

Welcome - xMinutes

becker — 2017-09-06T17:36:10+02:00

https://xminutes.net/