| ??? 06/29/05 07:28 Modified: 06/29/05 07:32 Read: times |
#96159 - 900 Mhz! Responding to: ???'s previous message |
Here is a 900 Mhz circuit
Most of home cecurity system in Iran use this frequency You see there is 2 board,one is for transmitter and second is for reciever(it is the first high frequency circuit that i made,circuit range was 15 meter at first,but it is 70 meter now) Both transmitter and reciever have 12 pins for addressing,any pin have 3 state(H,L,Z) so 3^12=531441,and up to 6 data pin for controlling (depended to kind if IC)is existed therefore the sameness probability of 2 remote control is 1/531441 If you use this,I'll promise you it meet your demands Mehdi 
 |
| Topic | Author | Date |
| Garage Door\gate frequency generation? | 01/01/70 00:00 | |
| posibilities | 01/01/70 00:00 | |
| more non-specific info | 01/01/70 00:00 | |
| have a look | 01/01/70 00:00 | |
| that's impossible | 01/01/70 00:00 | |
| unfortunatly, its possible | 01/01/70 00:00 | |
| Take a look inside. | 01/01/70 00:00 | |
| Will look inside tonight (with pictures) | 01/01/70 00:00 | |
| Remote Control! | 01/01/70 00:00 | |
| Pictures | 01/01/70 00:00 | |
| a tad better | 01/01/70 00:00 | |
| try the words | 01/01/70 00:00 | |
| FCC ID? | 01/01/70 00:00 | |
| well ....No clues | 01/01/70 00:00 | |
| ?HEARF? | 01/01/70 00:00 | |
| re:?HEARF? | 01/01/70 00:00 | |
| Manufacturer | 01/01/70 00:00 | |
| re:remote | 01/01/70 00:00 | |
| re:remote pt.2 | 01/01/70 00:00 | |
| re:programming | 01/01/70 00:00 | |
| Code: 22953 ?? | 01/01/70 00:00 | |
| re:code 22953 | 01/01/70 00:00 | |
| Am I understanding this correctly? | 01/01/70 00:00 | |
| ACT-31B | 01/01/70 00:00 | |
| Although,it looks easier | 01/01/70 00:00 | |
| Indeed, no fun | 01/01/70 00:00 | |
| Linear - just buy one | 01/01/70 00:00 | |
| So far so good! | 01/01/70 00:00 | |
| OT - but relevant. | 01/01/70 00:00 | |
| Try RFsolution | 01/01/70 00:00 | |
| codes | 01/01/70 00:00 | |
| wireless | 01/01/70 00:00 | |
| 900 Mhz! | 01/01/70 00:00 | |
| merely OT | 01/01/70 00:00 | |
| radio stuff | 01/01/70 00:00 | |
| Here is PCB file, | 01/01/70 00:00 | |
| Here is PCB file for receiver! | 01/01/70 00:00 | |
| Strange Oscillator? | 01/01/70 00:00 | |
| re:strange part | 01/01/70 00:00 | |
| My guess ? | 01/01/70 00:00 | |
Good guess | 01/01/70 00:00 |