High brightness blue light LED.
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Read more: Blue LED 3mm
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[bctt tweet=”Send alarm email notifications through #Gmail with #ESP8266 ” username=”OpenElectronics”] Based on our ESP03 demoboard, this device sends out email notifications through Gmail when the onboard P.I.R. detects movement. The traditional alarm system which just makes a sound alarm go off and maybe sends out an SMS, forcing you to cash out for…
Here we take advantage of Telegram bots for the development of a thermostat that may be controlled from a smartphone, by means of simple instant messages. Even though social networks and instant messaging services established themselves and spread rapidly, in the last years, many people do not go any further from Whatsapp and…
It allows us to detect the presence and passage of an object thanks to the combination of a laser diode which emits a light ray and a phototransistor which detects reflected light. Robotics applications and industrial control systems normally make use of optical systems in order to detect proximity and passing of objects,…
Multifunction panel mini timer with red LED display for one time (TIMER1) and green LED display for the other time (TIMER2), buttons for settings, output relay capable of switching maximum loads from 250 VAC / 10 A and 14 VDC / 20 A and status LEDs. The time can be set from 0 to 999…
Add quadrature encoders to your micro metal gearmotors (extended back shaft version required) with this kit that uses a magnetic disc and hall effect sensors to provide 12 counts per revolution of the motor shaft. The sensors operate from 2.7 V to 18 V and provide digital outputs that can be connected directly to a microcontroller or…
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