ARES Alerting Project
A Low Cost - Build It
Yourself – Tone Alert for
Activating Your ARES Group
Presented by:
Jeff Young, KB3HF
MO. Section EC
Today's Problem
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SCC Current Alerting Uses Public
Service System.
Narrow Banding Mandate
Requires New Equipment
Tone Alerts Are Expensive – Not
Budgeted in Narrow Band
Updates
Alternative System
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Amateur Based System –
Independent of PS System / Narrow
Banding Requirements.
Usable on Amateur Repeater
Systems Which Have Wide
Coverage.
Sponsored by Amateur Groups
(ARES).
Solution
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Design a Low Cost, Reliable 2 Tone
Sequential Decoder.
Must Externally Interface to Any
Amateur Radio/Scanner Without
Modification.
Great Group Build It Yourself
Project – Builds Individual Skills.
Decoder Features
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Plugs Into Radio External Speaker Jack.
External Speaker Plugs Into Decoder.
Audio Mute / Bypass Switch.
Ready LED, Alert LED Indicators.
Timed Audio - Mutes After Alert.
Reset Button to Reset Alert LED.
12V DC Operation.
Piezoelectric Alerting Sound Generator
Optional.
Example
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Tone Decoder & Amateur Radio.
Example
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Tone Decoder & Scanner.
Users
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St. Charles Co. ARES Group Using
First 18 Decoders.
Boone Co., St. Louis Co., Jefferson
Co., and Franklin Co. Missouri
ARES Groups Have Obtained and
Are Using the Decoders.
103 Total Decoders Now in Use.
Decoders Have Been Very Reliable.
Encoding
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Encoding is 2 Audio Tones
Transmitted Sequentially.
Method is Referred to as Motorola
Quick Call II or QC2.
First Tone is 1 Second in Length
followed by the Second Tone of 3
Seconds in Length.
Encoding Methods
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Two Tone Encoders Are Available.
 Communications Specialists
 Zetron Encoder
Encoding Methods
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Motorola Public Service Radios /
MaxTrac/GM300 with Signaling
Encoding Methods
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Repeater Controller
 CAT 1000 Repeater Controller Does 2
Tone Sequential Paging.
 Repeater Scheduler Allows Automatic
Paging For Weekly Nets.
 DTMF Accessed Macros Allow
Multiple/Authorized Users to Send a
Page Without a Personal Encoder.
Encoding Methods
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CAT 700 Repeater Controller With
SelecTone Encoder Added
Hardware
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Custom PC Circuit Board.
PIC Microprocessor Based System.
All Circuit Parts Commonly Available.
Step-by-Step “Heathkit” Type
Assembly Instructions.
Unit Cost Between $28 - $34 if Parts
Bought in Quantity.
Schematic
Parts List
Designation
QTY
√
Part
Value
Source
C1,C2,C3,C6,C8
5
Capacitor
.1 uF
DigiKey
399-4151-ND
C4, C5
2
Capacitor
22 pF
DigiKey
BC1005CT-ND
C7
1
Capacitor, Tant
4.7 uF
Futurlec
C0047UT
D2
1
Diode
1N4004
All Electronics
1N4004
Q1,Q2
2
Transistor
2N3904
Futurlec
2N3904
JP1, JP2
2
Jumper
0 Ohms
DigiKey
0.0QBK-ND
R10
1
Resistor
120 Ohms
DigiKey
120QBK-ND
R5
1
Resistor
330 Ohms
DigiKey
330QBK-ND
R1, R6, R7, RX
4
Resistor
1K Ohm
DigiKey
1.0KQBK-ND
R9
1
Resistor
10K Ohm
DigiKey
10KQBK-ND
R8
1
Resistor
20K Ohm
DigiKey
20KQBK-ND
R2, R3
2
Resistor
100K Ohm
DigiKey
100KQBK-ND
R4
1
Resistor
1M Ohm
DigiKey
1.0MQBK-ND
R11
1
Resistor
8.2 Ohms 5W
DigiKey
TWW5J8R2E-ND
SCR1
1
SCR
2N5062
DigiKey
2N5062GOS-ND
U1
1
Op Amp
LM358AN
DigiKey
LM358ANFS-ND
U2
1
Microprocessor
12F609
DigiKey
PIC12F609-I/P-ND
U3
1
Voltage Regulator
LM7805T
Futurlec
7805T
X1
1
Crystal
4MHz
DigiKey
X971-ND
D3
1
LED
RED T1-3/4
Futurlec
LED5RFL
D1
1
LED
GRN T1-3/4
Futurlec
LED5G
SW1
1
Push Button
N.C.
All Electronics
MPB-5
SW2
1
Toggle Switch
DPDT
Futurlec
DPDT11
SA1
1
Tone Generator
SONALERT
DigiKey
102-1634-ND
RLY1
1
Relay
Relay SPDT
Futurlec
JRC-23F-05
1
Relay (Alternate)
Relay SPDT
DigiKey
PB1017-ND
2
LED Mount
T1-3/4
2
Dip Socket
8 Pin
Futurlec
ICS8
J3
1
DC Jack
12V Coaxial
Futurlec
DCCHM4
P3
1
DC Plug
12V Coaxial Plug
Futurlec
DCPWRF004
J1, J2
2
Jack
3.5 mm Mono
Futurlec
P035SCK00
P1, P2
2
Plug
3.5mm Mono
Futurlec
P035MB
1
Enclosure
6"x3"x2"
All Electronics
MB-113
4
Feet
Stickon
DigiKey
SJ5508-0-ND
1
PC Board
Rev 1.1
Futurlec
Custom Design
4
Spacers
Nylon #4 Hole
DigiKey
876K-ND
6
Screw
4-40x5/8"
DigiKey
H348-ND
6
Nuts
4-40
DigiKey
H216-ND
6
Lock Washer
4-40
DigiKey
H236-ND
7
26 Ga. Wires
2-Blk, Red, Yel, Grn, Blu, Wht
2
22 Ga Wires
Blk, Red
2
Labels
All Electronics
Part No.
HLED-4
Instructions
Step by Step
Assembly
Instructions
Illustrations
F
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F
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G
9
1
0
F
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F
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G
1
1
1
2
Illustrations
F
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F
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1
7
1
8
F
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F
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G
1
9
2
0
Illustrations
F
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F
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2
5
2
6
F
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2
7
F
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2
8
Final
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Decoders Have Worked Well For
Over Two Years Now.
Group Project For DIY Building.
Great Tool for Alerting Nets,
SkyWarn Activations, Meetings, etc.
Final
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Demo of Paging Capability –
CAT 700 Repeater Controller
With Selectone Encoder Added
Zetron Encoder
Motorola GM300 VHF Radio
Questions??