You Got A mail!!!

[ChrisGreece52]

http://www.ebay.com/itm/24-Tune-Wireless-Digital-Doorbell-Door-Bell-Chime-Alarm-/390579834465?pt=AU_Home_Personal_Security&hash=item5af05f4e61
That Actually seems nice i could tweak the switch to fit and work with the mailbox... but i dont know its range ... ill ask the seller
Also the batteries are simple to find.

[GK]

How about just sticking a wireless door bell button to the front of the letter box with a little plaque "Attention postperson*: Press to notify of mail delivery".   


* I'm being politically correct now.

[ChrisGreece52]

How about just sticking a wireless door bell button to the front of the letter box with a little plaque "Attention postperson*: Press to notify of mail delivery".   


* I'm being politically correct now.

Too much hacking videos sorry
Seems pretty good but kids walk a lot in from of the staircase and the mailbox is a few steps higher from the ground so i think that the little bastards will keep pressing the doorbell (at least that is what i would do if i was 5 years younger)

[ChrisGreece52]

I contacted the seller and he said that the range of the doorbell is 100 meters that is more than enough for me but there is a problem... i can not find the proper sensor to replace the push button one that the device will already have.
I tried to search for a hall effect one but they are pretty expensive (8 dollars a piece) but the A1302 one seems nice and its pretty cheap too (1.40 from taydaelectronics.com)
http://www.taydaelectronics.com/a1302-continuous-time-ratiometric-linear-hall-effect-sensor-ic.html
Check the schematic a bit and make some suggestions because i dont know how to use it as a switch.
Anyway thank you and please help because the sensor is the trickiest part.

[SeanB]

One cheap alarm door contact. A reed switch in a nice case, and a matching magnet. Cheap or free, depending if you can get on a building site and look through the scrap and grab one from a renovation, or find them at your local hardware or used building material supplier, or any alarm installer has old ones.

[ChrisGreece52]

sorry but this would not do it i need to track if the lead is open or closes or if there is something inside.
A reed switch will be a bit tricky to be activated by lightweight folders

[ChrisGreece52]

sorry but this would not do it i need to track if the lead is open or closes or if there is something inside.
A reed switch will be a bit tricky to be activated by lightweight folders

Well that was my fault .... you meant something like that
http://www.taydaelectronics.com/fr2s1020-reed-switch-1-5a-10-20-a-t-spst-no-200-vdc-vac-fr2s1020-0520.html
I understood something like this