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1996-08-30
|
2KB
|
70 lines
(1) (2) (Female connector seen from solder side)
___|_______|___________________________________________
13 \ o . o . . . . . . . . . . / 1
\ . . . . . . . . . . . . /
25 \_________________________________________________/ 14
At the jack (mono):
------------
(1) (2)
| |
| |
.-D1>---. Don't try to see if this works without the
| | diode and the resistor. If you would do that
you could got your printer port severely
| R1 damaged!
| |
\ [ (4)
\ [
(3) [ [ <-- This pretends to be a mono jack
---
]
.
]
R1 = 100 Ohms
D1 = 4.7V Zener diode
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
For those more technically oriented I have here a design that
provides a much greater noise immunity.
(I DON'T KNOW WETHER THIS SECOND SCHEME IS CORRECT OR NOT.
I just find this lying around so if you decide to use it don't
blame me if it doesn't work. If however, you can put it to work,
could you send me a email?).
. 2 resistors (R)
. 3 capacitors (C)
. 1 diode
-----.---------- (3)
| |
(1) ---- C1 ---.--- R1 ---. D1
| | \/
| | |
C2 R2 |
| | |
| GND |
GND |
|
|
|
|
(2) -------------------------.----R3---- (4)
C1 = 0,1uF
C2 = 1KpF
C3 = 1KpF
D1 = 4.7V Zener diode
R1 = 650 ohms
R2 = 1 Khom
R3 = 100 ohms
GND = GROUND