• June 16, 2019

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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I’m working on a similar circuit. 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.

Try to get thin solid wire 24 AWG I believe. I have experimented further with this, connecting LEDs to the HT12D decoder data pins to ensure the transmitted and received data is presented correctly.

Use staples for power and ground rails. Note there is a gap on both sides down the ht12ee for the Blue and Red outer rails. Email Required, but never shown. All is working now, thanks to all. Thanks for all your awnser, after studying a little bit into the RF module I found out my problem, the left 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 TX need to have 20 times the resistence of the receiver, in other words 50k and 1M resistors.

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Remember I said check power? Pabitha Pabi 25 Ut12e at That means you need an inexpensive multimeter to do this. 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.

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. And the picture of the circuit done: I wondered whether these processors were still available – they are! The GPIO pin acting as the trigger function needs connecting via an inverter circuit.

RF Remote Based Dc Motor Driver Using HT12E & HT12D

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. Number 99 entered quits the script. Don’t use wire with thick insulation.

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 H1t2e. Home Questions Tags Ht12c Unanswered. The outputs from the HT12D decoder can be used to switch connected logic circuitry or other attached devices via suitable interfaces.

Yah but I agree. Newer Post Older Post Home. Posted ht12s Nigel Cleaver at gt12d Add decoupling caps close to the IC. It could be said that this is a very convoluted way to use this technology but it was really useful to experiment and hht12d that it was possible.


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. I see you do not have jumpers to join each side of the power rails. Guilherme Garcia da Rosa 2 3 7. 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.

I’ve never tried this before but looks ok. Tony EE rocketscientist 62k 2 21 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.

Using the Raspberry Pi to control.

ElectronicAdventures: Data Encoder/Decoder HT12E/HT12D

HT12E Encoder circuit The basic circuit arrangements for the encoder: Keep IC’s close toegether and imagine that it is a printed circtuit board layout. For fun here is a free tool to help design, layout and simulate. Sign up using Email and Password.