ミニ38KHz IR赤外線送信モジュール+ IR赤外線受信センサーモジュールRPI STM32
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value for money ... quality product... durable product... made up of good material...
This one is more expensive than other advertised that does the same. I ordered both, they both work, what I can say of difference is that this one is of better quality. For it's quality, the price is a bargain. So, it depends on your project and budget. For those starting in electronics, the emitter does not emit on 38kHz automatically (but the receiver does detect 38kHz automatically), you need set the Arduino to send the signal in the right pin (number 3 for UNO and Nano and number 9 for Mega).