hs0038 IR sensor tuned to 38KHz, perfect for receiving commands from a TV remote control. Runs at 5V (although it seems to be OK down to 3.3V)To use, connect pin 3 (all the way to the right) to 5V power, pin 2 (middle) to ground and listen on pin 1. It doesn’t do any decoding of the signal, just passes the ‘raw data’ along.
If you are in need of such a 4.0 BLE Bluetooth module, MCU can be set up,also can controlled by a remote Bluetooth device for setting,can transfer data, and can remotely control 10 PIO pins,so,the best choice is HM-10 bluetooth module. can replace HC-05, HC-06, HC-07 etc.
Raspberry Pi 3 Model B+
The Raspberry Pi 3 Model B+ is the latest product in the Raspberry Pi3 range, boasting a 64-Bit quad core processor running at 1.4GHz, dual band 2.4GHz / 5.0GHz wireless, Bluetooth 4.2/BLE, faster Ethernet and PoE capability via a separate PoE HAT. The dual band wireless comes with modular compliance certification...
If you are searching an ultrasonic ranging module, the HC-SR04 is good choice: Its stable performance and high ranging accuracy make it a popular module in electronic market. It's cheaper than an IR range finder with similar range accurancy and distance.
A simple mechanical structure, very convenient platform to build upon with 4 DC motors that can be controlled separately. Two levels of acrylic plates to allow for bigger electronics. Very simple assembly.