mramos1
Active Member
I have two dogs, that can get out of the dog door, but will not come back in as sometimes my wife closes the lock on them. I would like to make an automatic door opened.
My problem, the door, mechnical, and uC parts I can do. I can not think of a simple colar transmitter device and receiver to hook to the uC (will use a cheap AVR 1200A internal OSC etc). I thought about RF, but too many parts (and I forgot all that MANY years ago), then thought IR (but the sun will be a problem). Last thought was a 20-30Khz burst and audio pickup for receiver.
Any ideas. I want to have it also fire every 10-15 second to save battery life. 555 or transmiter OSC would be fine if soneone has done this, I would appreciate the help. I will tie the output of the RX to the uC, maybe use a hobby servor to left the flap (then then can see if the lock is off and come in..
Thanks for any ideas or the TX/RX circuits. Descrete or IC are fine. I have been out of the field for some time (15+ years, run an Internet company, so I do not do a lot of design anymore), so weak in designing with descretes (other than driving loads).
My problem, the door, mechnical, and uC parts I can do. I can not think of a simple colar transmitter device and receiver to hook to the uC (will use a cheap AVR 1200A internal OSC etc). I thought about RF, but too many parts (and I forgot all that MANY years ago), then thought IR (but the sun will be a problem). Last thought was a 20-30Khz burst and audio pickup for receiver.
Any ideas. I want to have it also fire every 10-15 second to save battery life. 555 or transmiter OSC would be fine if soneone has done this, I would appreciate the help. I will tie the output of the RX to the uC, maybe use a hobby servor to left the flap (then then can see if the lock is off and come in..
Thanks for any ideas or the TX/RX circuits. Descrete or IC are fine. I have been out of the field for some time (15+ years, run an Internet company, so I do not do a lot of design anymore), so weak in designing with descretes (other than driving loads).