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Room Temperature CO2 concentration Detection
HSKRC QAV250 RC Drone Frame Kit
Fully integrated clock generation that does not require an external crystal
carbon monoxide
4 Channel Relay Wireless Module Sensor Kits Room Temperature CO2 concentration Detection4 Channel Relay Wireless Module This is a 4 channel relay module which can be controlled by a wireless remote through a wireless RF link. The wireless board can operate within a range of 50m when the remote is in line of sight and around 25m when indoors. The RF link on this board works on the 433 MHz frequency. How to link the 4 channel relay with remote? To link the remote and relay, power relay board, hold down the button for about 1 second to
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