|step 1||What You Need...|
1. Motion Sensing Door Chime. Radio Shack Part #49-426
2. Mini Spy Cam DVR from Ebay
3. 200uF Capacitor
4. Any Reed Relay
5. Diode 1N4001, 1N4007, etc.
6. Momentary Switch
|step 2||Prepare the Motion Sensor|
Disasemble the Motion Sensor. There is opnly one screw under the battery compartment. Remove it and then pry apart the case. Cut or desolder the speaker leads and the external output cable and connector. This should leave you with just the circuit board and the 9V power connector.
|step 3||Assemble the Components|
Time to assemble the components that link the motion sensor and the DVR. Follow the included schematic. 1. Solder the diode to the reed relay paying attention to the cathode (-) position. The purpose of the diode is to prevent voltage flow back into the circuit when the relay is triggered. 2. Solder the capacitor to the diode. Again, pay attention to the striped (-) marking on the capacitor. The purpose of the capacitor is to turn the relay into a temporary switch by limiting the voltage pulses to a single pulse rather than the continual pulses the alarm gives out. 3. Make your connection from the (+) side of the cap to J2 on the circuit board. J2 is the trigger point for the motion sensor. 4. Make your connection from the anode (+) side of the diode to ground located where the 9V wires are at J5 on the circuit board. 5. Run two wires from the outside contacts on the relay to your switch. The switch allows you to stop recordin and power off the DVR.
|step 4||Prepare the DVR|
This is tricky. On the end of the mini DVR is a super-micro push button switch that must be de-soldered and removed. This may require an assistant to carefully lift up on each side with a tiny screwdriver as you heat the contacts. Once the switch is removed, solder two leads to the two contacts. Then wire the two leads to the outside contact on the reed relay. Done!
|step 5||Test it Out|
At this point you should be able to press the momentary switch and the DVR should power up (yellow indicator) and begin recording (blue indicator). Then attach a 9v battery and slide the switch on the motion sensor to the alarm position. (towards the 9v wires). There is a built-in 15 second delay when you turn it on to allow you to place the sensor and walk away. After that you should be able to wave your hand across the sensor and the DVR should power up and begin recording. While the sensor lens increases the range to around 30', eliminating it will reduce that distance so keep that in mind when you place it in service. The DVR is USB based. The movie files (352 X 288 12fps) are located in the "movies' folder when you plug in the DVR to your computer. Have Fun, Be Safe and use responsibly.