NEW NEW SCH(2)

REVISED PULSE-1 AND PULSE-2 showing some possible options

.25 AMP FUSE Link

Correction: Dec 29 2009.

For R15, R16 & R17 (J1 & J2)

REPLACE R5A, R7A & R9A WITH JUMPERWIRES.

AND USE NON-BRACK Values For R5, R7 & R9

1)    C28 MAY BE REDUCED IN VALUE FOR A OUICKER TONĘ CHANGE.

2)    IF CHANGING FREOUENCY TO 1Khz, C26 CAN BE REDUCE ALSO FOR A FASTER INTEGRATION TIME.

3)    THE CIRCUIT GROUND IS "ZERO TRACĘ", NOT THE BATTERY NEGATIVE.

Other Possible Options:

FUSE LINK AND D11

(OFF BOARD, REVERSE BATTERY PROTECTION)

S1 AND C11 FOR DUAL FREOUENCY 1.01 = 1khz. or.1 = 1Q0hz]

The Higher Frequency may be better for Smaller Objects.

150 R11

"—\w

H-l	p*L2A
JUMPER
N _l <	B ,
1 150	Q2

{ \

R13

rAAAA

NOTĘ: THE PULSE-2 IS NOT BETTER THAN THE PULSE-1 IT JUST HAS MORĘ POSSIBLE SETTINGS.

IF YOUR MAKING THE PULSE-2. USE VALUES INBRACKETS AND BEFORE STARTING IT UP THE FIRST TIME,

I ALSO RECOMMEND MAKING THE TOTAL OF:

R5 & R5A = 15K R7 & R7A = 6K6 R9 & R9A = 4K7 "AS OTHER SETTINGS MAY NOT WORK WITH ALL COILS".