The easy way to check your IR remote for proper operation. Simple operation : point the remote at the sensor and push an arbitrary button. Four flashing LED's indicate remote operation.

Ever wondered how good the air quality is in your living room? Or do you need proof of why you fall asleep in a non-ventilated meeting room after 3 hours? Look no further! This DIY experimental kit has all the answers!

The Earth Listener is an Arduino based sensor device that reads multiple environmental values to indicate the air quality. This kit is assembled in 15 minutes and you don't need a soldering iron! Just connect the parts and wires, put everything in the case and connect it to a 5V USB socket. The Mega development board is pre-programmed and shows eCO², TVOC (particles in the air), barometric pressure, temperature and humidity values onto the TFT touchscreen. To top thing off, the Earth Listener also contains a lightning detection sensor. If lightning (or electronic discharge) is detected, the Earth Listener will give an alarm tone and log how far the lightning is located. Since everything is open source, you can add an additional 6 sensors to the Earth Listener via the sensor shield. Logging is possible via the micro SD card (not included).

General purpose low-cost thermostat with NTC temperature sensor. Output relay with LED indicator.

A very practical easy to use counter. Suitable for counting parts, people or scorekeeping, bright red LED read out. To methods of counting, using on board push buttons to manually count up or down, alternatively use voltage free external input. The counter compares preset with count rate to set or clear an output. Also features auto reset, when counting up or auto 'load preset' when counting down.

Do you own a RaspberryPi? Add the WPSH206/VM205 shield and you also own a digital storage oscilloscope!
All standard oscilloscope features are available and the application source code is supplied, so you can develop your own application.
As a bonus, you also get a 10-channel logic analyzer, a great tool to monitor digital signals.

Not compatible with Model Pi3B+