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. Robokits India HT12E & HT12D Encoder and Decoder IC for RF Modules [RKI- ] – The HT 12E Encoder ICs are series of CMOS LSIs for Remote Control.

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I have experimented further with this, connecting LEDs to the HT12D decoder data pins to ensure the transmitted and received data is presented correctly. Note there is a gap on both sides down the middle for the Blue and Red outer rails. 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.

This ICs are paired with each other. So, you are saying, when you grounded all the pins on the left of HT12D and 12E, it worked? Email Required, but never shown. 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.


And the picture of the circuit done: I have referenced this before in an earlier blog and the direct link is: The outputs from the HT12D decoder can be used to switch connected logic circuitry or other attached devices via suitable interfaces. Did you really need to post that many images without the full URLS, no less? Sign up using Email and Password.

ClearAll set A ports to ”. The GPIO pin acting as the trigger function needs connecting via an inverter circuit. The transmission of the data stream can be over an RF link or direct connection using 2-core cable. I wondered whether these processors were still available – they are! Gt12d Encoder circuit The basic circuit arrangements for the encoder: We will notify you the result by email.

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Newer Post Older Post Ht12f. Using the Raspberry Pi to control. All is working now, thanks to all.

HT12E/ HT12D Encoder and Decoder RF Boards – Buy online in India |

Number 99 entered quits the script. Posted by Nigel Cleaver at Pabitha Pabi 25 June at The encoder HT12E is capable of encoding information comprising 12 bits in total; 8 address bits ht1d 4 data bits.


I’ve never tried this before but looks ok. Tony EE rocketscientist 62k 2 21 For fun here is a free tool to help design, layout and simulate. I see you do not have jumpers to join each side of the power rails.

Avoid long jumper wires at all costs. Don’t use wire with thick insulation. I’m working on a similar circuit. We will lauch an immediate investigation and try our best to beat the price, hr12e it proves to be the same product.


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. It could be said that this th12d a very convoluted way to use this technology but it was really useful to experiment and prove that it was possible.

Sign up or log in Sign up using Google. Keep IC’s close toegether and imagine that it is a printed circtuit board layout.

Best practice of using the breadboard is to use short solid wire leads and neatly connect flush to the board without large inductive loops. Easy Interface ht112e and RF or an Infrared transmission medium.

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