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HIGH POWER TOUCH SWITCH EXCITER 1/2W
1/2W
G
D
S
35V
1/2W
1W
1W
3
6
2
25V
15V
TOP
20KHZ
2V
D G S
B C E
FRONT VIEW
HEAT SINK
22V
DRAWN BY: DAVE JOHNSON
4
8
1
TLC555
HIGH POWER TOUCH SWITCH EXCITER
20KHz OSCILLATOR
FILTER
BUFFER
24VEXC.DSN
A
DAVID JOHNSON AND ASSOCIATES
24V TOUCH SWITCH
SWITCH EXCITER CIRCUIT
A
1
1
Monday, February 11, 2002
Size
Document Number
Rev
Date:
Sheet
of
R1
1K
+ C1
10
D1
1N4744
R2
10K
Q1
2N7000
C2
.0039
R4
1OK
C5
470pf
R6
1K
R7
10
R8
10
+ C4
100uf
R3
1K
R5
1K
5
+24V
4
GROUND
C3
.1
Q3
PN2222
Q2
PN2907
Q5
TIP-42
Q4
TIP41
F2
1/2 AMP
6
SIGNAL OUT
F1
2 AMP