Category Archives: sensor

Cheap Sensors and an SDR Monitor Conditions in this Filament Drying Farm

We don’t know where [Scott M. Baker] calls home, but it must be a pretty humid place indeed. After all, he has invested quite a bit in fancy vacuum storage containers to keep his 3D-printer filament dry, with the result being this sensor-laden filament drying farm.

[Scott] wasn’t content to …read more

Continue reading

Posted in 315 MHz, 3d Printer hacks, attiny85, bme280, humidity, ISM, pressure, printer filament, rtl_433, sdr, sensor, SYN115, temperature | Leave a comment

Detecting Cars with an ESP8266 Magnetometer

Having a motorized gate on your driveway is great, but only if there’s an easy way to trigger it. [Andrew] says the gate at his parent’s place could only be controlled by manually pushing a button on the panel or with a dinky remote that didn’t have nearly the range …read more

Continue reading

Posted in automatic, ESP8266, gate, home hacks, magnetometer, Microcontrollers, QMC5883X, sensor, weatherproofing | Leave a comment

Simulate Climate With An Arduino

There are usually two ways to go about any task: the easy way and the hard way. Sometimes we might not know there are two options, but once we see someone else’s solution we might feel differently. When running a greenhouse or small farm, for example, we might decide to …read more

Continue reading

Posted in arduino, cheap, controller, green hacks, greenhouse, model, plants, sensor, soil | Leave a comment

Torturing an Instrumented Dive Watch, for Science

The Internet is a wild and wooly place where people can spout off about anything with impunity. If you sound like you know what you’re talking about and throw around a few bits of the appropriate jargon, chances are good that somebody out there will believe whatever you’re selling.

Case …read more

Continue reading

Posted in BMP280, clock hacks, crown, depth, dving, ESP-01, misc hacks, pressure, seal, sensor, temperature, watch, water pressure, wifi | Leave a comment

Exploring Basement Humidity With A Raspberry Pi

Sometimes a hack isn’t about building something cool. Sometimes it’s more tactical, where the right stuff is cobbled together to gather the information needed to make decisions, or just to document some interesting phenomenon.

Take this impromptu but thorough exploration of basement humidity undertaken by [Matthias Wandel]. Like most people …read more

Continue reading

Posted in data acquisition, dehumidifier, dht22, environmental, home hacks, humidity, hvac, PiCam, Raspberry Pi, sensor | Leave a comment

Storm Chasers Score Bullseye On Tornado With Instrument-Packed Rocket

Model rockets are a heck of a lot of fun, and not a few careers in science and engineering were jump-started by the thrilling woosh and rotten-egg stench of an Estes rocket launch. Adding simple instrumentation to the rocket doubles the fun by allowing telemetry to be sent back, or …read more

Continue reading

Posted in IMU, LoRa, rocket, science, sensor, storm, telemetry, tornado, wireless hacks | Leave a comment

LED Matrix And A Phototransistor Make A Reverse Camera

A digital camera has an array of sensors that captures light reflected or transmitted onto it. This build is something closer to a reverse camera – a single sensor that makes images on a matrix of LEDs. And we think it’s pretty neat.

We have to admit to being a …read more

Continue reading

Posted in Arduino Uno, led hacks, matrix, phototransistor, raster, scanning, sensor, shift register, TIL78 | Leave a comment

Flexible PCB Contest Round Up

The 2019 Hackaday Prize, which was announced last week, is very much on everyone’s mind, so much so that we’ve already gotten a great response with a lot of really promising early entries. As much as we love that, the Prize isn’t the only show in town, and we’d be …read more

Continue reading

Posted in actuator, coils, contests, digikey, flex board, Flexible PCB Contest, Kapton, osh park, POV, sensor, wearable | Leave a comment

Flex PCBs Make Force-Mapping Pressure Sensor for Amputee

What prosthetic limbs can do these days is nothing short of miraculous, and can change the life of an amputee in so many ways. But no matter what advanced sensors and actuators are added to the prosthetic, it has to interface with the wearer’s body, and that can lead to …read more

Continue reading

Posted in amputee, contests, flexible circuit board, matrix, misc hacks, multiplexer, pic, piezoresistive, prosthetic, sensor, shift register, transducer, velostat | Leave a comment

Make a Non-Contact Voltage Probe

You’ve probably seen probes that detect live wires in, for example, home wiring, without having to actually probe the wire. These are sometimes used to test strings of Christmas lights, too. We’ve even seen the sensors built into a voltmeter. [Crazy Couple] has a few do-it-yourself versions that can do …read more

Continue reading

Posted in non-contact voltage, sensor, tool hacks, voltage sensor | Leave a comment