Nuts and Volts - October 2010

PARTS LIST ITEM DESCRIPTION C1 220 µF 6. 3 V C2 .001 µF C3 – C5 – C7 .1 µF C6 4. 7 µF 16 V Header female 3 position .1” Header male 2 position .1” Header male 6 position .1” Header male 8 position .1” IC1 PIC16F690 IC2 ISD1110P Jack 1/8” mono LED 3 mm red R1-R6 1K 1/6W R2 5.1K 1/6W R3-R4-R11-R12* 10K 1/6W R5 470K 1/6W R7-R8-R9-R10 150 1/6W S1 Three-position DIP *R12 jumper if not using PIR

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SOURCE

chip and continues with a series of delays and flashes. The “CALL” feature is a great way of performing the same function over and over. You simply call the procedure you want; at the end of the procedure, you place a return and it will go back to the command after the CALL.”

Microchip.com Jameco.com

Running Shazam

16 ea 1 ea SuperBrightLeds.com Parallax.com

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Use either a small 16 ohm speaker or (better yet) plug your stereo into the jack. Set all the DIP switches to open. Put in the batteries. Place R12 across the PIR pins 1 and 3; short S2. The LEDs should flash downward and then the voice chip will activate. The LEDs will flash again. If you leave S2 shorted, it will flash every 30 seconds. You can change the DIP switches to increase the time. If you short and release, it will flash each time you short after the sound finishes at the time level the DIP switches have been set to. R12 prevents false triggering when using A, it will change its outputs which you don’t want it to do. So, you place port A into a TEMP register and AND the TEMP registers instead.

Recording

Remove the PIR module. Connect a microphone or tie the headers into the earphone outlet of your computer and connect it to the headers titled “MIC.” Put one DIP switch in the closed position and the other two in the open position. When ready, short S2, open S2, and short again to record. The LED will light indicating that the chip is recording. Wait until the light turns off.

There are many thunder sounds available on the Internet. Just perform a search for “thunder sounds.” Use a 1/8” plug with about 6” of wire-wrap; put the plug into the ear phone jack of your computer and wrap the wire around the “Mic” pins. Push both the play button on your computer and short S2 at the same time to record. The chip will record 10 seconds of sound. If you goof, try again.