using RF modules. with HT12e/d

[Farrukh Shaikh]

hello,

iam trying to make a RF based remote control using ht12e, and ht12d encoder decoders, along with RF modules, iam attacing the circuit diagram…

 but i dont know why it isnt working ….. can any 1 help PLEASE….?????

[dagakshay]

so try whats the problem.. ckts are ok… 

[santosh mishra]

change the resister value to one mega ohm and 51kohm must work

[dagakshay]

that doesn’t make much effect… but yes you can try that too…

actully the resistance value can be selected using the graps in the data sheet… 

[harinarayanan]

connect A0 to A7 to GND at the transmitting circuit

 

[AJISH ALFRED]

Your address bits in the encoder are floating, while those are connected to ground in the decoder. Do the same in the encoder also. Also note that when the keys in the transmission circuit are open, your input bits are floating, So pull up D0 to D3 of the encoder to VCC using a resistor not less than 1k. I hope you’ve selected matching resistors for the encoder and decoder, after going through the datasheet.

[Anonymous]

what kind of wattage can you use for both resistors? does it make a lot of difference??

[Amrith]

You can use 1/4 watt or 1/8 watt resistors.

 

[AJISH ALFRED]

 

In electronics world whenever we talk about a resistor by default it is quarter ( 1/4 ) watt

[YOGESH AGRAWAL]

Dear Sir,

 

Please give me diagram for using HT 12D with ZAB-3000 Long Range Transmitter Module & HT 12E with RXD1 Receiver.I wants to make RF remote circuit for long range.

 

Regards,

Yogesh Agrawal

 

  

[Author]

Posts