875 Results for "soil+sensor"

Select image sensor
Log from A Spring-Drive Digital Movie Camera
Select the image sensor to be used in the project. The image sensor must be placed just behind the shutter, but must be a small sensor board due to the limited size of the film chamber.The maximum width of the space for the sensor should be 20 mm, and...

Temperature Sensor Integrating (Success)
Log from Peril-Sensitive Sunglasses
Integrating the TMP36 temperature sensor was simple, I've used it before. It looks like a transistor and outputs a voltage proportional to temperature. Adafruit has a thorough guide on its use.Making the sensor work was easy. Using...

Stuff and non-sensor
Log from The Water Watcher
[Edit: Forget all this. See next project log article.]In July 2021, the TSL2591 ambient light sensor I was using went bad. I replaced it, and things went back to normal. In the last couple of weeks, that replacement sensor went bad. It's probably due...

Map Sensor Constraints
Log from Guri: Ignition Controller for Air Cooled Engines
The easiest way to measure the Manifold Air Pressure is using an off the shelf automotive MAP sensor which integrates all signal conditioning circuitry and provides a linear response to a vacuum signal. The MAP sensors are specified in kPa (kilo Pascal),...

Hall sensor test
Log from CNC MPG
The most common way of detecting pulses & direction is to use quadrature encoding, this is where the pulses are shifted 90*. So how to you create this type pulses with a hall sensor and magnets? There are a number of types of hall sensors: unipolar,...

Sensor Hardware Integration
Log from GePS
GoalsThe first issue we attack is the integration of the sensor unit: Better form factor for easier wearability. It should be possible to sew the unit into the glove.Bring down latency: Lower latency for better performance experience through improved...

Anemometer ( Wind Speed Sensor)
Log from Solar Powered WiFi Weather Station V3.0
The wind speed sensor is a cup-type anemometer measures wind speed by closing a contact as a magnet moves past a reed switch. As per the datasheet, a wind speed of 2.4km/h (1.4912 mph) causes the switch to close once per second. The anemometer switch...

Mouse sensor saturation
Log from USB Crank-Stick
My V2 prototype was more or less working but I was struggling to get a nice feeling while using it. I knew the mouse sensor couldn't keep up with the speed of the wheel, I was expecting to have a saturated Y value but be able to use the X value to approximate...

Sensor Board Mega-Update!
Log from Open Source Science Tricorder
A big update with lots of pictures -- I've been building and testing many of the first revision sensor boards.Watching the PWM of your soldering station's power supply!One of the things I remember most from building the Open Source Science Tricorder...

Reading sensor values
Log from sensor node
Reading the sensor values turned out to be pretty straight forward. The emlib provides a nice abstraction for handling I2C communication. Furthermore, there are a few examples that can be found around the web. In the first iteration, I took the simplest...

Position sensor - current performance
Log from Serial Sensor
Here's a video on the position sensor output (csv output from the phone is visualized and manually synced with the video). Output of the position sensor is the position (x, z in meters), orientation (rad) and velocity in m/s. For the position estimation,...

The dust sensor
Log from Portable environmental monitor
If the space on the already crowded PCB allows it, the uRADMonitor-D will incorporate a dust sensor as well. I did my homework and the GP2Y10 sensors are ready to be used.Featuring an infrared LED and, a receiving phototransistor and two lenses, this...

Calibrating the flow sensor
Log from Water Flow Monitor
I bought a flow sensor from Amazon: https://www.amazon.com/gp/product/B086W73NXNIt's made by Gredia, whatever that means -- I could find exactly zero information on the manufacturer and no data sheets on the sensor. All I knew is what was in the Amazon...

First Sensor Boards
Log from Open Source Science Tricorder
A bunch of the sensor boards arrived this week! I confess that holding them in your hand is a lot different than seeing them in Eagle CAD -- these new sensor boards are tiny. Modular Sensor BoardsThe first three (of five) sensor boards arrived,...

Sensor operation described
Log from Cordless phone RESET when off - hook & no audio
The On Hook Sensor, is a voltage sensor that provides a logic low when the phone line voltage is 29 volts to 48 volts DC when the phone is On Hook ( hung up). The zener voltage(14 x2=28) plus the opto LED forward voltage drop determines the lowest voltage...

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