Print PDF
Favorite
Email
Step 6Build the circuit.
Essentially it is an LM339 chip and a voltage divider going to the positive input pin.
Solder your 14 pin socket to the board.
Pin 3 and Pin 14 are connected to power (red) and ground (black) respectively.
The 1K resistor goes from Pin 6 to Pin 3. I used a value of 1K, but you may need another value. Remember, not all photocells are created equal and the value of your photocell will affect the value of your other resistor.
Speaking of photocells, the photocell should go from Pin 6 to ground. But first you need to solder the photocell to the wires coming out of the top of the owl's head. Make sure the wires are not crossing and then insulate them very lightly with hot glue. And once the glue is somewhat dry then you should put a drop on the bottom of the photocell and glue it flush to the top of the owl's head. And finally you can connect the photocell to the circuit board. Make sure you are connecting the photocell wires and not the wires being dropped down from the LED display.
Now, take the connectors coming from the display and connect Pin 1 to ground and Pin 3 to power. That's it for that.
Attach the 9V battery connector to the board. Make sure you connect it in a way that you can attach a switch between ground on the battery and ground on the board. Attach the switch between ground on the battery and ground on the board
Note: do not go by the picture of my wiring. I accidentally switched the colors of the wires running off of the display board.
Solder your 14 pin socket to the board.
Pin 3 and Pin 14 are connected to power (red) and ground (black) respectively.
The 1K resistor goes from Pin 6 to Pin 3. I used a value of 1K, but you may need another value. Remember, not all photocells are created equal and the value of your photocell will affect the value of your other resistor.
Speaking of photocells, the photocell should go from Pin 6 to ground. But first you need to solder the photocell to the wires coming out of the top of the owl's head. Make sure the wires are not crossing and then insulate them very lightly with hot glue. And once the glue is somewhat dry then you should put a drop on the bottom of the photocell and glue it flush to the top of the owl's head. And finally you can connect the photocell to the circuit board. Make sure you are connecting the photocell wires and not the wires being dropped down from the LED display.
Now, take the connectors coming from the display and connect Pin 1 to ground and Pin 3 to power. That's it for that.
Attach the 9V battery connector to the board. Make sure you connect it in a way that you can attach a switch between ground on the battery and ground on the board. Attach the switch between ground on the battery and ground on the board
Note: do not go by the picture of my wiring. I accidentally switched the colors of the wires running off of the display board.
| « Previous Step | Download PDFView All Steps | Next Step » |
 |
Add Comment
|
