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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Avoid long jumper wires at all costs. Use staples for power and ground rails.

I have included a simple Python3 script below, which prompts the user to enter a number between 0 and 15, and using Binary Coded Decimal, sets the AD8 – AD11 pins to convey the user entered number correctly. This ICs are paired with each other. Be the first to write a review. And the picture of the circuit done: Don’t use wire with thick insulation. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

Sign up or log in Sign up using Google. I wondered whether these processors were still available – they are! 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.

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

Return and Refund Policy. So, hy12e are saying, when you grounded all the pins on the left of HT12D and 12E, it worked? Tony EE rocketscientist 62k 2 21 Using the Raspberry Pi to control. Thanks a lot for helping us to maintain competitive prices.


By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Keep IC’s close toegether and imagine that it is a printed circtuit board layout. Add decoupling caps close to the IC. 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. I began to think about how I could use this technology with the current range of micro-controllers such as the Arduino and the Raspberry Pi, together with other potential uses.

Actual product may vary from the product photograph displayed above. I see you do not have jumpers to join each side of the power rails.

I’ve never tried this before but looks ok. Customers who bought this product also purchased It would be possible to control literally hundreds of external devices this way. TB Stepper Motor Driver 4. The transmission of the data stream can be over an RF link or direct connection using 2-core cable.

Ht12w have experimented further with this, connecting LEDs to the HT12D decoder data pins to ensure the transmitted and received data is presented correctly. The encoder HT12E is capable of encoding information comprising 12 bits in total; 8 address bits and 4 data bits.

ElectronicAdventures: Data Encoder/Decoder HT12E/HT12D

Pabitha Pabi 25 June at ClearAll set A ports to ”. Posted by Nigel Cleaver at Number 99 entered quits the script.

Thanks for all your awnser, after studying a little bit into the RF module I found out my problem, the hg12e side of both encoder and decoder are the Address PIN, which means they will only communicate if those addresses are the same, that was what I was making wrong, I left them all at 1 and changed the resistors in them both cause the Ht2e need to have 20 times the resistence of the receiver, in other words 50k and 1M resistors. Best practice of using the breadboard is to use short solid wire leads and neatly connect flush to the board without large inductive loops.


I’m working on a similar circuit. Photograph just for reference. That means you need an inexpensive multimeter to do this.

HT12E, HT12D RF board

Found this item with same quality and at a lower price but prefer to buy from robokits. We will notify you the result by email. Sign up using Email and Password. HT12E Encoder circuit The basic circuit arrangements for the encoder: With the possibilities of using multiple decoders HT12D all ‘listening’ on their individually configured addresses it is possible for yt12e Raspberry Pi or Arduino to control both the address values and control the use of the ht12r pins.

Mercury ball tilt switch 5mm dia. 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. Easy to Use, Versatile Robotics Kits Guilherme Garcia da Rosa 2 3 7.


All is working now, thanks to all. Full Name Email Address. The GPIO pin acting as the trigger function needs connecting via an inverter circuit. Post as a guest Name.