Elenco Electronics MO-1251 Uživatelský manuál stáhnout pdf (Strana 50)

100

PARTS LIST

All resistors

are'

/4 -watt,

5 %.

R1-

10,000

potentiometer

R2, R9

-4700 ohms

-1500 ohms

R4, R7, R8- 10,000

ohms

R5- 10,000

trimmer potentiometer

R6-

33,000 ohms

R10-12

ohms

Capacitors

-10µF,

15 volts,

electrolytic

C2,

-10µF,

20 volts, 10

°o,

tantalum

C3 0.1µF ceramic disk

Semiconductors

IC1

-Texas

Instruments. TLC555CP

oscillator

01-

2N3906

transistor

02, 03-

2N3904,

2N2222, or

equivalent transistor

D1- 1N4148, 1N914,

or equivalent

diode

LED1. LED2 -Dialight

#521

-9247,

red

LED

Other components

S1 -slide

switch.

Mouser

#10SP018

J1.

J2 -mini phone

-jack. 2 conduc-

tor,

closed circuit

PL1, PL2

-mini

phone

-plugs,

conductor

Miscellaneous: 9 -volt battery

clip.

Amerex

box No. 171,

aie

-inch

No. 4

screws. No. 4 washers,

knob.

board, pair

goggles. 1 -inch

diam-

eter black

-vinyl

caps

for goggles,

foot

of 22 -gauge wire

(red and

black).

Note:

The following is

available

from Mark

Worley, PO

Box

261113,

San

Diego,

CA 92126. Kit

No. 1 has

all

the listed

parts

for

alpha frequency

only,

including

wire for

the interconnecting ca-

ble

and

internal

wiring, instruc-

tions. diagrams,

and schematic:

$40.

Kit No. 2

contains all the

parts of kit No. 1 plus

and

for theta frequency:

$43. A silk -

screened PC board with parts

placement

sheet

available

for

$5,

plus $0.50 postage.

adapter

suitable to power the A/

MG is

available for $5

plus $1

postage.

Please

include $3

ship-

ping

charge per kit order.

Cali-

fornia residents

must

add

tax. Payment in

U.S.

funds

only.

Shipment

will

be made within 30

days of

receipt

of order.

Please

include

a SASE when inquiring

about

individual parts

tech-

nical questions.

the theta

mode,

otherwise

the

A/MG

will

be in

the alpha mode.

(The un-

marked

pad

between R2

and R3

can

used

in place

of pad "J"

if you find

it more

convenient.)

16. Mount the PC board

with

four

No.

4 screws

and four No.

4 washers,

that

Si is fixed solidly against the

inside edge of the box.

Goggle

assembly

shown

in Fig. 5, the goggles are

built

from modified swimming gog-

gles,

which

can be bought from a

variety of department and sporting -

goods

stores for

less.

Choose

darkly colored goggles if you have

choice.

1. Carefully identify the center

of the

lenses; that's

where

the LED's

will

mounted. That

way

you'll

get the

maximum

exposure

from the LED's.

Some goggles are made

from

plastic that

can

shatter quite easily

when

drilled, so use sharp drill bits

and operate

your

drill at the lowest

practical speed

possible.

Drill

the

LED mounting holes 0.2-

inch in diameter, or better yet, mea-

sure

your LED's

with

calipers and

drill the holes slightly

undersized.

With

care, you'll

get

a good

press fit.

If the hole is too large, a little epoxy

or Super

glue will fix

that.

Don't wor-

ry about a little glue mess because

will

be covered later.

4. Drill

a series of 5 holes (Via-inch

diameter) across the top of the gog-

gles (not the lenses) to allow them to

"breathe."

Remember, they are

wa-

tertight,

we'll

need to

let

any

per-

spiration

escape.

5. Use minimum heat and a heatsink

when

soldering

wires

to the LED's

because they are easily

destroyed by

excessive

heat. Solder the following

wires

about 1/4-inch up

from the base

of the LED, then clip the

LED leads

just above the solder point. Tightly

twist a pair of red and black

22 -gauge

wires

to form a flexible cable about 3-

feet long

connect the

goggles

and

the

control box. Solder a 3 -inch

wire

between the cathode of LEDI to the

anode

of LED2; solder the red

wire

the 3 -foot twisted pair to the anode of

LEDI, then solder the black

wire

the

twisted

pair

to the

cathode

LED2.

6. Finally, attach a mini phone plug to

the

end

of the

cable

that matches J1,

on the control

box.

7.After verifying

that the

LED's flash

properly

when

plugged into the con-

trol box, use epoxy,

hot

glue,

or RTV

to glue two plastic bottle caps over the

exposed lead ends of the two

LED's,

and

then anchor the twisted -pair cable

to the side of the goggles to prevent

straining the LED

solder connec-

tions.

The caps can be medicine -vial

caps, bottle caps, or anything

similar

that's about 1 inch

diameter.

8. Complete any

final assembly

work,

attach the

two halves of the instru-

ment

case, and

apply power.

Using

the goggles

Seat yourself comfortably

where

you'll have minimal distractions. Put

the

goggles on and adjust the straps

for a comfortable

fit. Place the

control

box

where

you can easily adjust the

flashrate with minimal arm move-

ment. Now close your eyes and turn

the

A/MG

on. Play

with

the

flashrate

control for awhile to get a feel for the

instrument. At the two extreme ends

the

control's

rotation, you should

SWIMMING

GOGGLES

LED'S MOUNTED IN

GOGGLE

FACING THE

EYE

LEDI

LED2

PLI

MEDICINE -VIAL

CAP

FIG.

5 -THE

ALPHA -MEDITATION GOGGLES are really

common swimming

goggles

having LED's

mounted inside each eye goggle. The LED's

are

electrically

connected

series,

and synchronously

flash on and off.

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 99 100

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