This project has been design around HT12E and HT12D encoder / decoder chips from Holtek. With jumper selectable address on the receiver. The HT12E Encoder ICs are series of CMOS LSIs for Remote Control system applications. They are capable of Encoding 12 bit of information which consists of 8. By using the paired HT12E encoder and HT12D decoder we can easily transmit and receive 12 bits of parallel data serially. HT12E simply converts 12 bit.

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It would be possible to control literally hundreds of external devices this way.

ElectronicAdventures: Data Encoder/Decoder HT12E/HT12D

I also thought it would be a great opportunity to fully investigate the operation of the two processors to help me better understand how I might use these in the future. Sign up using Facebook. Keep IC’s close toegether and imagine that it htt12e a printed circtuit board layout. Newer Post Older Post Home. Trigger send trigger pulse. ClearAll set A ports to ”.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Bt12e outputs from the HT12D decoder can be used to switch connected logic circuitry or other attached devices via suitable interfaces.


I began to think about how I could use this technology with the current range of micro-controllers such as ht1d2 Arduino and the Raspberry Pi, together with other potential uses. With the possibilities of using multiple decoders HT12D all ‘listening’ on their individually configured addresses it is possible for the Raspberry Pi or Arduino to control both the address values and control the use of the data pins.

All is working now, thanks to all. I’m working on a similar circuit. I have experimented further with this, connecting LEDs to the HT12D decoder data pins to ensure the transmitted and received data is presented correctly. Yah but I agree. Home Ht12v Tags Users Unanswered. I know but, and I’m going to sound like Olin here it should be easy to see how inconvenient it is, even for a new user.

And the picture of the circuit done: The output from the encoder can be used in various ways; for example to feed a Radio Frequency or infrared transmitteror it could be directly connected to a decoding processor. For fun here is a free tool to help design, layout and simulate.

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Remember I said check power? So, you are saying, when you grounded all the pins on the left of HT12D and 12E, it worked?

Using the Raspberry Pi to ht2d. The encoder HT12E ht122e capable of encoding information comprising 12 bits in total; 8 address bits and 4 data bits. The GPIO pin acting as the trigger function needs connecting via an inverter circuit. Sign up using Email and Password. It could be said that this is a very convoluted way to use this technology but it was really useful to experiment and prove that it was possible.

I’ve never tried this before but looks ok.

RF Remote Based Dc Motor Driver Using HT12E & HT12D

Avoid long jumper wires at all costs. Sign up or log in Sign up using Google. HT12E Encoder circuit The basic circuit arrangements for the encoder: Add decoupling caps close to the IC. Did you really need to post that many images without the full URLS, no less? I haven’t drawn any circuits for this as the interfacing is straight forward as both the Raspberry Pi and the HT12E operate at 3. Pabitha Pabi 25 June at