Questions tagged [keyboard sensors] (131)

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How to connect a capacitive touch dimmer to the led strip?

Friends, Hello! Ashamed to admit it, but I can't figure out how to connect touch dimmer to the led strip. In the presence of a dimmer itself (see Photo), led strip and battery pack. The batteries with tape to make friends succeeded, but how to implement this circuit dimmer, to touch you gently and smoothly turn off the tap...
darion_Miller97 asked April 8th 20 at 18:09
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Is there any available ultrasonic liquid level sensor in a metal container for Arduino?

Interested in the task of making an ultrasonic sensor measuring the fuel level in the LPG tank of the car. The task did not seem especially complicated: need the sensor itself, Arduino and a simple screen. The main thing - to teach the system to convert the sensor readings into numbers on the screen corresponding to the vol...
Emanuel_Considine asked April 7th 20 at 11:57
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Someone knows ready RF the set of reed switch sensor door opening and several receivers of this signal?

Hi For problem tacit information about the openness of the door in several places at once - maybe someone saw a set from one of the wireless reed switch sensor (such separately - mountain) in the housing with a battery, but with some receivers of this signal that shows the status just svetodiody silently ? Of course, each u...
Candelario.Labadie asked April 7th 20 at 10:47
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How to determine what turned on the light?

How can you distinguish a situation when a person, conditional put, put the plug into the outlet, from the situation when the plug was in the socket, but the power was out, and then appeared. In both cases the power, but the device should work only if the inclusion was done intentionally by the user. Under the fork means an...
billy.Schroeder asked April 3rd 20 at 18:55
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How to make a capacitive soil moisture sensor?

Good afternoon. There is a challenge to make a capacitive soil moisture sensor, for use in agriculture. Need a person having knowledge in this area for advice:)
riley.Monahan asked April 2nd 20 at 16:25
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How to remove noise pickup in the sensor?

there is a controller on ESP32S ( M5 Stack to be precise ). There is a flowmeter sensors ( inside the impeller with magnet and hall sensor ) the sensors are connected to digital inputs of the controller. Each sensor three lines: the +3.3 V signal and ground. The signal is bridged to +3.3 V 5.1 kOhm resistor and to ground wi...
Heloise_Wi asked March 29th 20 at 23:27
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Is there a diagram or ready Chinese module operational amplifier with comparator for a piezo pickup?

for electronic drums that is required at the ADC input of the microcontroller feeding the amplified signal from the piezoelectric transducer only if it exceeds a certain value, which can be adjusted by trimming resistor. @rahsaan_Bashirian90 suggested scheme from the functional unit associated with the fixing of the irregu...
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How to remotely learn about the outage?

Are there any sensors and/or the services for SMS, etc. notifications in the event of a power outage in the apartment?
Richie_Boy asked March 25th 20 at 12:16
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How can I simulate the steps in Google Fit on the phone?

There was such task. Help who than can. They have there a system of monitoring sensors, but maybe there's some snag.
Gordon_Metz asked March 23rd 20 at 20:34
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Not reads the DHT22 sensor. What to do?

A Arduino Uno and a DHT22 sensor. Use the dht library and the Adafruit Unified Sensor to output readings of temperature and humidity. But get the error "Failed to read from DHT sensor!!! ". Photo diagram attached, used the example program dhtTester. What am I doing wrong and how to solve this problem?
Bobbie_Berge asked March 23rd 20 at 18:40