Skip to content

Commit ba32271

Browse files
tardatetardate
authored
[HT12/SimpleDemo] add project (#151)
* [HT12/SimpleDemo] add project * tidy notes
1 parent baec79f commit ba32271

19 files changed

+140
-4
lines changed

‎README.md

+2-2
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,6 @@
1-
# 732 Little Electronic Art Projects
1+
# 733 Little Electronic Art Projects
22

3-
> Latest addition:sparkles: [Raspberry Pi B+ Case](./RaspberryPi/BPlusCase) - Finally, 3D PLA printing a case for the Raspberry Pi Model B+ ... at the library.
3+
> Latest addition:sparkles: [HT12 Simple Demo](./Radio/LPD433/HT12/SimpleDemo) - A demo of the HT12D decoder and HT12E encoder ICs used with an LPD433 module to broadcast 4 bits of data to an 8-bit address on the 433 MHz UHF/70-centimeter band.
44
55
LEAP is just my personal collection of electronics projects - usually involving an Arduino or other microprocessor in one way or another.
66
Some are full-blown projects, while many are trivial breadboard experiments, intended to learn and explore something interesting.

‎Radio/FM/SingleStageTransmitterKit/.catalog_metadata

+1-1
Original file line numberDiff line numberDiff line change
@@ -6,4 +6,4 @@
66
"relative_path": "Radio/FM/SingleStageTransmitterKit",
77
"updated_at": "2019-08-04T11:25:24Z",
88
"created_at": "2019-08-04T11:25:24Z"
9-
}
9+
}

‎Radio/LPD433/HT12/SimpleDemo/.catalog_metadata

+9
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,9 @@
1+
{
2+
"name": "HT12 Simple Demo",
3+
"description": "A demo of the HT12D decoder and HT12E encoder ICs used with an LPD433 module to broadcast 4 bits of data to an 8-bit address on the 433 MHz UHF/70-centimeter band.",
4+
"categories": "Radio, LPD433, HT12",
5+
"relative_path": "Radio/LPD433/HT12/SimpleDemo",
6+
"updated_at": "2025-03-18T13:22:00Z",
7+
"created_at": "2025-03-18T13:22:00Z",
8+
"id": "#765"
9+
}

‎Radio/LPD433/HT12/SimpleDemo/README.md

+81
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,81 @@
1+
# #765 HT12 Demo
2+
3+
A demo of the HT12D decoder and HT12E encoder ICs used with an LPD433 module to broadcast 4 bits of data to an 8-bit address on the 433 MHz UHF/70-centimeter band.
4+
5+
![Build](./assets/SimpleDemo_build.jpg?raw=true)
6+
7+
## Notes
8+
9+
The Holtek Semiconductor HT12D is a decoder IC that is typically paired with the HT12E encoder IC for use in remote control systems and wireless communication applications. The HT12D decodes the received data and extracts the original address code and data code information.
10+
11+
These chips appear to be particularly useful for simple remote automation projects,
12+
providing for up to 4-bits of data without the need to introduce a microcontroller.
13+
14+
The HT12E and HT12D chips in DIP18 form factor:
15+
16+
![ht12e-ht12d](./assets/ht12d-ht12e.jpg)
17+
18+
The LPD433 transmit and receive modules:
19+
20+
![lpd433-module](./assets/lpd433-module.jpg)
21+
22+
Recommended application circuit. Note:
23+
24+
* Transmitter Rosc is not clearly specified in the datasheet, but ~1.1MΩ is indicated. 1MΩ is used in the demonstration circuit below.
25+
* Receiver Rosc is not clearly specified in the datasheet, but ~51kΩ is indicated. 47kΩ is used in the demonstration circuit below.
26+
* Receiver VT pin goes high when a valid transmission is received.
27+
28+
![ht12e-ht12d-application](./assets/ht12e-ht12d-application.jpg)
29+
30+
### Some Tutorials and Demonstrations
31+
32+
HT12E and HT12D the Encode and Decoder IC, Experiment Remote control by MrProject TSE
33+
34+
[![clip](https://img.youtube.com/vi/-xK0B_bM-yk/0.jpg)](https://www.youtube.com/watch?v=-xK0B_bM-yk)
35+
36+
RF Remote Control Circuit Using 433 Mhz Module and HT12E Encoder and HT12D Decoder IC by Manmohan
37+
38+
[![clip](https://img.youtube.com/vi/51TNQiaXm3U/0.jpg)](https://www.youtube.com/watch?v=51TNQiaXm3U)
39+
40+
### Circuit Design
41+
42+
For the demo, I've setup the circuits as follows.
43+
44+
Transmitter:
45+
46+
* 5V power supply
47+
* address A2=low
48+
* manual DIP switches attached to AD8, AD9, AD10, AD11 to set the data to be sent
49+
* manual pushbutton S1 is used to trigger the data send
50+
51+
Receiver:
52+
53+
* 5V power supply
54+
* matching address A2=low
55+
* green LEDs wired to D8, D9, D10, D11
56+
* optional LED attached to VT (valid transmission indicator)
57+
58+
Operation:
59+
60+
* power pon both units
61+
* set the transmission DIP switches to the 4-bit value to be sent
62+
* press S1
63+
* On successful reception, VT goes high momentarily
64+
* data values set on D8, D9, D10, D11 should match the sent data
65+
66+
Works fine. With the on-chip antennas and 5V transmitter, reliable transmission range is only a few metres. Extra range should be achieved by attaching the recommended external antennas, and boosting the transmission voltage (up to 12V).
67+
68+
![bb](./assets/SimpleDemo_bb.jpg?raw=true)
69+
70+
![schematic](./assets/SimpleDemo_schematic.jpg?raw=true)
71+
72+
![bb_build](./assets/SimpleDemo_bb_build.jpg?raw=true)
73+
74+
## Credits and References
75+
76+
* [HT12E and HT12D: Price, Working and Datasheet](https://www.avaq.com/technology/ht12e-and-ht12d)
77+
* [HT12D/HT12F Decoder Product Information](https://www.holtek.com/page/vg/HT12D_F)
78+
* [HT12A/HT12E Encoder Product Information](https://www.holtek.com/page/vg/HT12E)
79+
* [HT12A/HT12E - 2^12 Series of Encoders](https://www.farnell.com/datasheets/1899539.pdf)
80+
* [HT12D/HT12F - 2^12 Series of Decoders](https://www.farnell.com/datasheets/57850.pdf)
81+
* [RF Transmitter and Receiver With HT12E & HT12D](https://electronics4ubymanmohanpal.blogspot.com/p/blog-page_19.html)

‎Radio/LPD433/HT12/SimpleDemo/SimpleDemo.fzz

23.6 KB
Binary file not shown.

‎Radio/LPD433/HT12/SimpleDemo/assets/SimpleDemo_bb.jpg

683 KB
Loading

‎Radio/LPD433/HT12/SimpleDemo/assets/SimpleDemo_bb_build.jpg

468 KB
Loading

‎Radio/LPD433/HT12/SimpleDemo/assets/SimpleDemo_build.jpg

388 KB
Loading

‎Radio/LPD433/HT12/SimpleDemo/assets/SimpleDemo_schematic.jpg

257 KB
Loading

‎Radio/LPD433/HT12/SimpleDemo/assets/ht12d-ht12e.jpg

312 KB
Loading

‎Radio/LPD433/HT12/SimpleDemo/assets/ht12e-ht12d-application.jpg

85.4 KB
Loading

‎Radio/LPD433/HT12/SimpleDemo/assets/lpd433-module.jpg

370 KB
Loading

‎Radio/LPD433/HT12/SimpleDemo/assets/simpledemo_build_thumbnail.jpg

1.79 KB
Loading

‎_data/catalog.json

+10
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,14 @@
11
[
2+
{
3+
"name": "HT12 Simple Demo",
4+
"description": "A demo of the HT12D decoder and HT12E encoder ICs used with an LPD433 module to broadcast 4 bits of data to an 8-bit address on the 433 MHz UHF/70-centimeter band.",
5+
"categories": "Radio, LPD433, HT12",
6+
"relative_path": "radio/lpd433/ht12/simpledemo",
7+
"updated_at": "2025-03-18T13:22:00Z",
8+
"created_at": "2025-03-18T13:22:00Z",
9+
"id": "#765",
10+
"original_relative_path": "Radio/LPD433/HT12/SimpleDemo"
11+
},
212
{
313
"name": "Raspberry Pi B+ Case",
414
"description": "Finally, 3D PLA printing a case for the Raspberry Pi Model B+ ... at the library.",

‎_data/projects.json

+10
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,14 @@
11
{
2+
"/radio/lpd433/ht12/simpledemo/": {
3+
"id": 765,
4+
"title": "HT12 Simple Demo",
5+
"summary": "A demo of the HT12D decoder and HT12E encoder ICs used with an LPD433 module to broadcast 4 bits of data to an 8-bit address on the 433 MHz UHF/70-centimeter band.",
6+
"tags": [
7+
"Radio",
8+
"LPD433",
9+
"HT12"
10+
]
11+
},
212
"/raspberrypi/bpluscase/": {
313
"id": 764,
414
"title": "Raspberry Pi B+ Case",

‎catalog/atom.xml

+13-1
Original file line numberDiff line numberDiff line change
@@ -7,12 +7,24 @@
77
<id>https://leap.tardate.com/</id>
88
<icon>https://leap.tardate.com/catalog/assets/images/favicon-32x32.png</icon>
99
<logo>https://leap.tardate.com/catalog/assets/images/favicon-32x32.png</logo>
10-
<updated>2025-03-18T05:12:00Z</updated>
10+
<updated>2025-03-18T13:22:00Z</updated>
1111
<author>
1212
<name>Paul Gallagher</name>
1313
<email>[email protected]</email>
1414
<uri>https://github.com/tardate</uri>
1515
</author>
16+
<entry>
17+
<id>https://leap.tardate.com/radio/lpd433/ht12/simpledemo/</id>
18+
<link href="https://leap.tardate.com/radio/lpd433/ht12/simpledemo/"/>
19+
<g:image_link>https://leap.tardate.com/radio/lpd433/ht12/simpledemo/assets/simpledemo_build.jpg</g:image_link>
20+
<updated>2025-03-18T13:22:00Z</updated>
21+
<title>#765 HT12 Simple Demo</title>
22+
<summary>A demo of the HT12D decoder and HT12E encoder ICs used with an LPD433 module to broadcast 4 bits of data to an 8-bit address on the 433 MHz UHF/70-centimeter band.</summary>
23+
<content type="html">&lt;div&gt;&lt;p&gt;A demo of the HT12D decoder and HT12E encoder ICs used with an LPD433 module to broadcast 4 bits of data to an 8-bit address on the 433 MHz UHF/70-centimeter band.&lt;/p&gt;&lt;img src=&quot;https://leap.tardate.com/radio/lpd433/ht12/simpledemo/assets/simpledemo_build.jpg&quot; /&gt;&lt;/div&gt;</content>
24+
<category term="Radio"/>
25+
<category term="LPD433"/>
26+
<category term="HT12"/>
27+
</entry>
1628
<entry>
1729
<id>https://leap.tardate.com/raspberrypi/bpluscase/</id>
1830
<link href="https://leap.tardate.com/raspberrypi/bpluscase/"/>

‎catalog/catalog.json

+10
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,14 @@
11
[
2+
{
3+
"name": "HT12 Simple Demo",
4+
"description": "A demo of the HT12D decoder and HT12E encoder ICs used with an LPD433 module to broadcast 4 bits of data to an 8-bit address on the 433 MHz UHF/70-centimeter band.",
5+
"categories": "Radio, LPD433, HT12",
6+
"relative_path": "radio/lpd433/ht12/simpledemo",
7+
"updated_at": "2025-03-18T13:22:00Z",
8+
"created_at": "2025-03-18T13:22:00Z",
9+
"id": "#765",
10+
"original_relative_path": "Radio/LPD433/HT12/SimpleDemo"
11+
},
212
{
313
"name": "Raspberry Pi B+ Case",
414
"description": "Finally, 3D PLA printing a case for the Raspberry Pi Model B+ ... at the library.",

‎catalog/categories.json

+1
Original file line numberDiff line numberDiff line change
@@ -88,6 +88,7 @@
8888
"Guitar Effects",
8989
"HC-SR04",
9090
"HF",
91+
"HT12",
9192
"Human Input",
9293
"I2C",
9394
"ICSP",

‎catalog/sitemap.xml

+3
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,8 @@
11
<?xml version="1.0" ?>
22
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
3+
<url>
4+
<loc>https://leap.tardate.com/radio/lpd433/ht12/simpledemo/</loc>
5+
</url>
36
<url>
47
<loc>https://leap.tardate.com/raspberrypi/bpluscase/</loc>
58
</url>

0 commit comments

Comments
 (0)