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 also thought it would be a great opportunity to fully ht12r the operation of the two processors to help me better understand how I might use these in the future. Thanks for all your awnser, ht2d 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, hf12d 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.
Keep IC’s close toegether and imagine that it is a printed circtuit board layout.
All is working now, thanks to all. Don’t use wire with thick insulation.
ElectronicAdventures: Data Encoder/Decoder HT12E/HT12D
Newer Post Older Post Home. Add decoupling caps close to the IC.
I have included a simple Python3 script below, which prompts the user to enter a number between 0 and 15, and bt12d Binary Coded Decimal, sets the AD8 – AD11 pins to convey the user entered number correctly.
Post as a guest Name. So, you are saying, when you grounded all the pins on the left of HT12D and 12E, it worked?
ht12d & ht12e | EngineersGarage
Note there is a gap on both sides down the middle for the Blue and Red outer rails.
That means you need an inexpensive multimeter to do this. 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.
ht12d & ht12e
I know but, and I’m going to sound like Olin here it should ht112d easy to see how inconvenient it is, even for a new user. 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. Try to get thin solid wire 24 AWG Ht12r believe. Tony EE rocketscientist 62k 2 21 The transmission of the data stream can be over an RF link or direct connection using 2-core cable.
The outputs from the HT12D decoder can be used to switch connected nt12e circuitry or other attached devices via suitable interfaces. Trigger send trigger pulse.
It would be possible to control literally hundreds of external devices this way. The encoder HT12E is capable of encoding information comprising 12 bits in total; 8 address bits and 4 data bits. ClearAll set A ports to ”. Sign up using Facebook. Did you really need to post that many images without the full URLS, no less? I wondered whether these processors were still available – they are!
Guilherme Garcia da Rosa 2 3 7. Email Required, but never shown.