Make a pair of Audiostrobe-compatible LED glasses for use with brainwave entrainment software

Step 2 Parts and Tools

Parts:

ICs:

• IC1 - LM567C tone decoder $1.80 at Digikey or 3/$1.00 at Electronic Goldmine
• IC2 - L7805T voltage regulator $.49 at Digikey or $.35 at Electronic Goldmine

Resistors (use 1/4W, to be safe):

• R1 - 470 Ohm
• R2 - 47 Ohm (read notes at end of step 8; you might prefer to just use a bus wire)
• R3 - 47 Ohm (if you use a diode other than green with 2.2v drop, you might need to change this; probably not critical)

Capacitors:

• C1 - 0.1uf
• C2 - 0.005uf
• C3 - 0.02uf
• C4 - 0.01uf
• C5 - 1uf
• C6 - 100uf
• C7 - 10uf

Note: C1-C4 can be any type; I used ceramic. C5-C7 should be electrolytic

Diodes:

• D1 - 1N4004 (any small-signal diode should be fine here)
• LED1 - standard 3mm green, 20mA with 2.2v drop

Misc:

• 3 x 3.5mm stereo jack (if you get different jacks, the leads may not align with the traces on the board; check the datasheets)
• SW1 - SPST switch
• SW2 - SPDT switch
• 9V Battery connector (see note)
• 9V Battery
• PCB or protoboard
• Wire (around 24-28 gauge)
• Altoids mint tin
• Various nuts, bolts, and washers.

Note: I chose to go another route for the battery connection. My way makes changing batteries much easier (and less likely to have the connector break while changing batteries), but it's significantly more time consuming to build than just soldering in connector wires. Your choice.

Glasses:

• Safety glasses
• LEDs, color and number of your choosing
• Resistors, dependent upon your choice of LEDs
• Either a headphone cable or an audio patch cable

Tools and Supplies:

Necessary:

• Soldering Iron
• Solder
• Wire cutters
• Drill (preferably drill press, but hand drill will do)
• Screwdrivers, etc.
• Epoxy (get the two hour stuff; 5 minute sets too fast to be useful)
• Super glue (for when epoxy just doesn't cut it)
• Electrical tape
• Sandpaper
• Rubbing alcohol

Nice to have:

• Flux
• Dremel
• Belt sander
• Needle files
• Center Punch
• Helping Hands or vise
• Magnifying glass