EV1527 4 Bits RF Encoder Chip for Remote Control Type A to Mini USB the pulse pattern of the

the pulse pattern of the output voltage may distinguish smoke from house dust

These are Carbon Film Resistor with a value of 180k ohm 1/2W and tolerance of ±5%

The Female DC Power Jack Socket 2

It is powered by a USB and does not need any external power source

EV1527 4 Bits RF Encoder Chip for Remote Control Type A to Mini USB the pulse pattern of theEach IC EV1527 has guaranteed unique 1 million code possibility preprogrammed one time into it during manufacturing. The IC EV1527 gives much better result as compared to HT12E PT2262 which are fixed code and does not need end user address configuration. The IC EV1527 is called learning type since the receiver has to store its code before i can detect future packets. It gives better security.