ID-O-Matic Manual
6/16/2004
Page 3 of 5
Location
Part
R1
10K Ohm resistor (brown-black-orange)
R2
470 Ohm resistor (yellow-violet-brown)
R3
1K Ohm resistor (brown-black-red)
R4, R5
22K Ohm resistor (red-red-red)
C1
.01 F capacitor (marked 104)
Q1, Q2
2N7000 MOSFET – make sure transistors are oriented as shown on the board
U1
18-pin IC socket – make sure notch in socket is positioned to match the board
outline
X1
DB-9 connector
LED
Dual-color LED. Mount the LED so the “stepped” lead (red cathode) and flat side
of the LED base is toward the top of the board, farthest from the board edge.
Off-Board Connections
You will probably want to install a RESET switch. Pads are provided to connect a SPST normally open pushbutt on switch to
reset the timer.
A series of six pads (marked JP1) are provided along the edge of the board opposite the serial connector. These connections
may be left open, or can be used as follows:
Pad
Function
JP1-1
TEST input; ground this to hear the CW ID message.
JP1-2
INHIBIT input; active low logic level input
JP1-3
SQUELCH input; active low logic level input
JP1-4
CW output; logic level at 20 mA max
JP1-5
PTT output; logic level at 20 mA max
JP1-6
Ground
