Hallo everyone, newbie from Ireland. Always fascinated by Electronics and Mechanics and everyday is a learning curve for me.
Anyway........I am planning on making a device that will self buzz me into the apartment. We only get 1 electronic fob per flat and problem is either my girlfriend or me has the fob at one time and that leaves the other person stranded and having to wait for someone to buzz us in.
I have these components :
- Arduino Uno R3
- Breadboard
- 1k and 4k7 resistor
- 4n25 Optocoupler
- BC548B NPN transistor
- Jump wires
- 5v led x2
- 12v led
- 9v polaroid battery
Well this is about all. The intercom system in the building is FARFISA PT510W (Wiring diagram attached).
I have heard about using just the Transistor to bridge PIN 6(Call) and PIN 3(Common/Ground) so that PIN 5(Lock) will be activated but it didnt work when i did a mock up on breadboard. Should i be using NPN or PNP transistor.
Anyway there was an alternative which was a circuit on this site:
http://mouseextinction.com/2013/doorbell-buzzer-hack-for-keyless-entry/
I tried the circuit and the led was lighting but i couldnt understand the code. My apartment is buzzed using a 4/3 digit code e.g 0123 or 123 meaning its 01/1 (first floor) 23 as apartment number.So you can omit first digit 0 and just put in 123 and it will still buzz. However in the code (http://mouseextinction.com/2013/doorbell-buzzer-hack-for-keyless-entry/) how will the Unlock be initiated as its not comparing input code to stored code so it can set pin 13 == High
Any help will be greatly appreciated as long as i can get it working.
Thanks.
Anyway........I am planning on making a device that will self buzz me into the apartment. We only get 1 electronic fob per flat and problem is either my girlfriend or me has the fob at one time and that leaves the other person stranded and having to wait for someone to buzz us in.
I have these components :
- Arduino Uno R3
- Breadboard
- 1k and 4k7 resistor
- 4n25 Optocoupler
- BC548B NPN transistor
- Jump wires
- 5v led x2
- 12v led
- 9v polaroid battery
Well this is about all. The intercom system in the building is FARFISA PT510W (Wiring diagram attached).
I have heard about using just the Transistor to bridge PIN 6(Call) and PIN 3(Common/Ground) so that PIN 5(Lock) will be activated but it didnt work when i did a mock up on breadboard. Should i be using NPN or PNP transistor.
Anyway there was an alternative which was a circuit on this site:
http://mouseextinction.com/2013/doorbell-buzzer-hack-for-keyless-entry/
I tried the circuit and the led was lighting but i couldnt understand the code. My apartment is buzzed using a 4/3 digit code e.g 0123 or 123 meaning its 01/1 (first floor) 23 as apartment number.So you can omit first digit 0 and just put in 123 and it will still buzz. However in the code (http://mouseextinction.com/2013/doorbell-buzzer-hack-for-keyless-entry/) how will the Unlock be initiated as its not comparing input code to stored code so it can set pin 13 == High
Any help will be greatly appreciated as long as i can get it working.
Thanks.
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