■ FIGURE 4.
There are no off or on switches on either box. Once
the batteries are installed, they are active. Turn the
transmitter box on its side so that its antenna is pointing to
the left; observe the receiver. Now turn the box so that it
is on its back or front. The receiver light should change.
(See the demo video in the NV downloads.)
The transmitter should be mounted with the antenna
horizontal and pointing left. If there is only one garage
door, it can be mounted with double-backed Velcro tape.
As the door tips activating the tilt switch, the transmitter
will transmit. If you have more than one garage door (up
to three), you can use a magnetic switch on the doors and
connect them to the three terminals in the box. (Check
■ FIGURE 6.
HAS 2. 3
DOOR AND SEND
COMBINA TION AND
DOOR CODE FOR 5
BELOW 2. 4
■ FIGURE 5.
out Digi-Key CKN6004-ND.) Terminal one is common
ground. Cut the trace coming from the tilt indicator.
Again, mount the box with the antenna horizontal.
The receiver should be placed on either side with the
antenna also horizontal. If the switch is pressed, the unit
will act as an alarm if the doors are open.
The program files are also located on the NV website.
It is best to download MPLAB IDE from www.microchip
.com to program or make modifications. They are labeled
Garage Transmitter.asm and Garage Receiver.asm. See
Figure 6 for the flowchart.
You will need a PIC II programmer for programming.
HAS 2. 3
PUT TO SLEEP
HAS 9. 2
TURN ON LEDS
OPEN OR CLOSED