Page2of 2
Filename: relay-cpg2.tcw
RELAY-C
SCHEMATIC
DUALREMOTESTARTPULSESTRETCHER
Date: 12/16/02
By:M.Watts
Q5
2N3903
1
3
4
5
2
8
7
6
+12V
+12V
R5
1M
C2
.01uF
U1
555
TIMER
R7
10M
C4
.2uF
C3
.01uF
+12V
R6 10K
IN
OUT
GND
REMOTESTARTCIRCUIT#1
(MOMENTARYGROUNDINGOFTHE INPUT
PRODUCESA2SECONDNEGATIVEGOINGPULSE
ONTHEOUTPUTWHICHTRIGGERSTHE
LAWSONBOARDREMOTESTARTFUNCTION.)
R8
10K
R9
10K
Q6
2N3903
1
3
4
5
2
8
7
6
+12V
R10
1M
C5
.01uF
U2
555
TIMER
R12
10M
C7
C6
.01uF
+12V
R11 10K
IN
OUT
GND
REMOTESTARTCIRCUIT#2
(MOMENTARYGROUNDINGOFTHE INPUT
PRODUCESA2SECONDNEGATIVEGOINGPULSE
ONTHEOUTPUTWHICHTRIGGERSTHE
LAWSONBOARDREMOTESTARTFUNCTION.)
R13
10K
R14
10K
+12V
.2uF
