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J:\ECO_wip\00_1099 L910PB_1.0\L910AY_1\L910AY_1.ddb - L910CT_1.sch
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
P85 microcontroller and switch
Circuit Diagram
L910CT
CG
29-Sep-2000
INITIALS
Date Printed
1 1Sheet of
Notes:
STANDBY
SPKR1 ON
SPKR2 ON
THERMPROT 1
VIPROT 1
DCPROT 1
AC PRESENT
TRIGGER
REMOTE
+5V_D
LED1 LED2
R
G
LED3
Q4
BC556B
Q3
BC556B
0V_D
R13
560R MF
R12
560R MF
0V_D
PB5
1
PB4
2
PA3
3
PA2
4
PA1
5
PA0
6
PB3
7
PB2
8
PB1
9
PB0
10
VSS
11
(TMR)/INT
12
PC0
13
PC1
14
PC2
15
PC3
16
PC4
17
PC5
18
RES
19
VDD
20
OSC1
21
OSC2
22
PA7
23
PA6
24
PA5
25
PA4
26
PB7
27
PB6
28
Z1
HT48R30 28-DIP-B-0
X1
CST4.00
D1
1N4148
0V_D
C1
100N CD
DCPROT
VIPROT
SP2 LED
PWR GRN
PWR RED
SP2 SW
SP1 SW
SPKR2 ON
SPKR1 ON
STANDBY
PWR SW
REMOTE
TRIGGER
AC PRESENT
SP1 LED
THERMPROT
1
2
3
Z2A
74HC32
4
5
6
Z2B
74HC32
9
10
8
Z2C
74HC32
12
13
11
Z2D
74HC32
THERMPROT 1
THERMPROT 2
VIPROT 1
VIPROT 2
DCPROT 1
DCPROT 2
DCPROT
VIPROT
THERMPROT
VDD
14
GND
7
Z2E
74HC32
C4
100N CD
C3
100N CD
C2
100N CD
0V_D
+5V_D
SP1 LED
SP2 LED
PWR RED
PWR GRN
PWR SW
SP1 SW
SP2 SW
+5V_D
R14
330R MF
R15
180R MF
R5
10K MF
R7
10K MF
R6
10K MF
R8
10K MF
R16
100K MF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SK1
0V_D
+5V_D
SPKR1 ON
SPKR2 ON
THERMPROT 2
VIPROT 2
DCPROT 2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SK2
0V_D
+5V_D
R9
10K MF
R10
10K MF
R11
10K MF
+
C8
100U EL
+
C7
100U EL
+
C6
100U EL
Q2
BC556B
Q1
BC556B
R3
10K MF
R4
10K MF
R2
10K MF
R1
10K MF
BY SK1 BY SK2 BY Z1
FIX1
FIXING HOLE
FIX2
FIXING HOLE
FIX3
FIXING HOLE
FIX4
FIXING HOLE
FIX5
FIXING HOLE
Layout by
Cliff
EL1
CLOGO
FR4, 1 OZ Cu
PCB MATERIAL
DD1
FR4_1OZ
Photo Strip
PS
PHOTO_STRIP
PCB
PCB
L910PB_1
Detail
Drilling
DD2
DRILL_DWG
Update Box
EL2
UPDATE_BOX
C9
100N CD
C10
100N CD
C11
100N CD
C12
100N CD
C13
100N CD
0V_D
Paper Marker
A3 Vertical
DD3
DD_A3V
SW3
A1506
+
C5
10U EL
Q6
BC546B
Q5
BC546B
Q7
BC546B
+5V_D
0V_D
R18
10K MF
R17
10K MF
0V_D
0V_D
0V_D
SPKR1 ON
SPKR2 ON
STANDBY
D2
1N4148
R19
470R MF
R20
470R MF
R21
470R MF
+
C14
100U EL
CL 28/09/00 PRODUCTION RELEASE 1.0
00_1099
TL1
TOOLING
TL2
TOOLING
SW1
A1503
SW2
A1503