Tesero BANDIDO2

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Choppers
section
Low pass filters
section
Non ferrous
channels
D2
D1
Receive
C1
6 39pF
C29 10nF
C3
3 22nF
C39
4
.7uF
R46
5
.1k
R
4
5 1
M
+5V
IC8B
F ~ 11,13 KHz
R29
1
00k
R
50
6
2
0k
R65
2.2k
5
6
R
55
4
.7k
Power supply
RX
6.2mH
R26
5
.1k
7
T3
2N3906
Sens.
C31
4
70nF
IC7B
C17
2
20n
F
IC4A
IC9B
R48
4
7k
IC10B
+5V
R5
10k
R33
2
0k
R37
1
00k
+5V
LM393
- 5V Converter
6
C
15
33nF
4066
6
7
6
2
7
1
2
5
7
5
5
C4
1
00uF
T7
2N
390
6
MC33178
R57
1M
-5
V
R27
5
.1k
R30
1k
TLC2262
R52 15
0k
+
D6
1
3
SENS
10k 40%
MC33178
C21
100nF
C24
10nF
R6
10
k
+9V
+5V
C5
100uF
D4
R67
1k
2
IC2
D7
+5V
R53
1k
T4
2N3904
R28
100k
3
IN
1
OUT
D3
R66
200
C34
100nF
LM2931
C28 10nF
R7
2.2k
+
C3
2 22nF
BAT
9V
GND
C6
220uF
R1
1.2k
C38
4
.7uF
R44
5
.1k
R
4
3 1
M
R68
10k
R2
12k
C42
100uF
Transmit
R
49
6
20k
+9V
IC8A
LM
393
T1
2N3906
IC9A
C30
4
70nF
R47
4
7k
2
R32
2
0k
IC4B
R36
1
00k
IC10A
R54
4
.7k
R14
20
2
2
4066
1
2
1
C36
1
00nF
Au
dio Amp.
3
4
3
1
3
3
Threshold
D5
C2
47nF
R3
20k
MC33178
C20
100nF
C23
10nF
TLC2262
C25
1
00nF
R56
1M
+5V
R59
2
00k
R61
1
00k
T6
2N3906
C8
220uF
R51 10
k
R15
5.1k
C1
470nF
TX
5.75mH
All
metal
channel
R42
1k
R41
4
70k
2
SW 1 & 2
- Disc.
- All Met.
- Retune
THRESH
T5
2N3904
R60
2
.2k
IC
3B
R62
2
0k
2
SW1
100k
6
IC6B
7
2
Fosc ~ 10,15 KHz
5
TLC2262
3
1
R16
1
50
R31
2
0k
IC4C
R35
1
00k
4
-5V
U
1
Jack
DISCRI
100k 4
0%
4066
6
7
TLC2262
2
3
8
9
5
C37
470nF
2
SW2
R39
2
00k
C19
1
00nF
C22
10nF
3
1
Battery Check
J
2
R17
100
IC6A
RED
GREEN
C10 22pF
4
R18
150
TLC2262
R40
2
.7M
R58
2
00k
R
19
8
2k
+5V
R38
2
.7M
S1
+9V
+5V
SPK1
8
2
R11
2
00k
-5V
IC5B
1
C9
100pF
3
J1
R25
20k
IC
7A
R23
10
0k
R69
2
7k
LM393
Auto
C35
10nF
-5V
2
1
6
R9
100k
3
7
5
R10
1
00k
IC4D
IC
3A
R13
1k
VOL
+5V
MC33178
R64
1
0k
4066
2
1
10
11
220 ~ 470
3
C12
180pF
R22
20k
C14
8.2pF
R7
0
10k
IC5A
R8
200k
TLC2262
Discrimination
LM393
C7
10uF
2
3
1
R24
68k
R34
47k
50K 3.5 Turns
R12
430k
GND
C18
22pF
+5V
+5V
optional
D11
C13
10pF
R21
10k
R4
47k
IC1
-5V
R20
1k
VDD
Ground Balance
Q1
R63
10
0k
CLK
Q
Q2
D10
D
9
D
8
4024
Q4
Q5
Q6
Q7
for Fosc = 10,15 KHz
Q1 = 5 KHz
Q2 = 2,5 KHz
Q3 = 1,25 KHz
Q4 = 625 Hz
RESET
T2
2N3904
Note:
- All IC's except IC1 use + / - supply rails
- C39 C38 can be electrolytics
- RX Fosc ~ 11,13 KHz
- TX Colpitts Fosc ~ 10,15 KHz
VSS
Battery check modification (by Carl)
add R24 68k
change R11 200k => 2M
swap R8 - R9
Put a jumper properly on J1
Put a bicolor LED on J2
Tesoro Bandido II traced by Driscoll
You can add or not the pot in audio stage (220 ~ 470ohm)
to control the header volume (very useful for me).
Rev ID
1
Complete schematic
Date: 27 SEPTEMBER 2004 Page: 1 of 1
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