HC12 SI4463 Wireless Serial Port Communication Module 2835 led the device is Pb-free internally

the device is Pb-free internally

Resistance Value 68 ohm Color Code Blue

when a phototransistor passes through black and white lines

These are Carbon Film Resistor with a value of 24k ohm 1/8W and tolerance of ±5%

These are Metal Film Resistor with a value of 39k ohm 1W and tolerance of ±5%

HC12 SI4463 Wireless Serial Port Communication Module 2835 led the device is Pb-free internallyThe HC 12 is the easiest way to transfer data over the air between two Arduino. Just connect the RX and TX pins for the transfer of data. It is a 100mw multi channel wireless transceiver you can use in your projects to transmit and receive serial information. HC 12 module has a microcontroller that actually doesnt have to be programmed by the user. For configuring the module we simply use AT commands, which can be sent from an Arduino, a PC, or any