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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Tony EE rocketscientist 62k 2 21 Sign up using Facebook. Sign up or log in Sign up using Google.

Use staples for power and ground rails. For fun here is a free tool to help design, layout and simulate. I have referenced this before in an earlier blog and bt12e direct link is: Don’t use wire with thick insulation. Sign up using Email and Password. It would be possible to control literally hundreds of external devices this way.

Home Questions Tags Users Unanswered. Post hf12e a guest Name. ClearAll set A ports to ”. The transmission of the data stream can be over an RF link jt12e direct connection using 2-core cable. Did you really need to post that many images without the full URLS, no less? 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 ht12s in them both cause the TX need to have 20 times the resistence of the receiver, in other words 50k and 1M resistors.


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.

bt12e Note there is a gap on both sides down the middle for the Blue and Red outer rails. 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. Email Required, but never shown. I have experimented further with this, connecting LEDs to the HT12D decoder data pins to ensure the transmitted and received data is presented correctly.

Add decoupling caps close to the IC. The encoder HT12E is capable of encoding information comprising 12 bits in total; 8 address bits and 4 data bits.

RF Remote Based Dc Motor Driver Using HT12E & HT12D

I see you do not have jumpers to join each side of the power rails. I’ve never tried this before but looks ok. Keep IC’s close toegether and imagine that it is a printed circtuit board layout.

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. The outputs from the HT12D decoder can be used to switch connected logic circuitry or other attached devices via suitable interfaces. Post Your Answer Discard 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.

Best practice of using the breadboard is th12e use short solid wire leads and neatly connect flush to the board without large inductive loops. I wondered whether these processors were still available – they are! All is working now, thanks to all.


ElectronicAdventures: Data Encoder/Decoder HT12E/HT12D

Guilherme Garcia da Rosa 2 3 7. The GPIO pin acting as the trigger function needs connecting via an inverter circuit. Remember I said check power? 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. Newer Post Older Post Home. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Yah but I agree. That means you need an inexpensive multimeter ht12r do this.

ht12d & ht12e | EngineersGarage

Try to get thin solid wire 24 AWG I believe. Trigger send trigger pulse. 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. So, you are saying, when you grounded ht1e the pins on the left of HT12D and 12E, it worked?

I haven’t drawn h1t2d circuits for this as the interfacing is straight forward as both the Raspberry Pi and the HT12E operate at 3. I know but, and I’m going to ht12s like Olin here it should be easy to see how inconvenient it is, even for a new user.

I’m working on a similar circuit. Posted by Nigel Cleaver at 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 ht122e these policies. Avoid long jumper wires at all costs.