Transcript Assembly Manual

CricketSat Receiver
Assembly Manual
Mike Fortney
06/26/2006
Index
•
•
•
•
•
Receiver Parts Map
Receiver Circuit Board Assembly
Testing
Troubleshooting
Contact Info
Parts Map
Print out the Parts Map on the following
page.
Lay components on respective images to aid
in identification during assembly.
CricketSat Receiver Parts Map
R1
Antenna Wire
Notch
Not Used
680 Ohm
R2 Blue-Gray-Brown-Gold
180k Ohm
-
+
SW1
Switch
U1
5V Regulator
U3
Audio Amplifier
IC
R3 Brown-Gray-Yellow-Gold
U2
Receiver Module
R4 10k Ohm Volume Control
10 Ohm
R5 Brown-Black-Black-Gold
Battery Clip
Printed Circuit Board
Notch
White Band
47uF
+
C1
D1 Diode
C2
47uF
U3 Socket
C6
+
+
47uF
C3
0.1uF
J1 Audio Jack
C4
J2
Speaker Jack
C5
0.1uF
0.1uF
-
1N4001
-
Speaker
+
D2 LED
-
+
Receiver Assembly (1 of 16)
 Install resistors R2, R3, and R5. Solder and snip leads.
 Resistors are not polarized, orientation is not important.
 R2, 680 Ohm (blue-gray-brown-gold)
 R3, 180k Ohm (brown-gray-yellow-gold)
 R5, 10 Ohm (brown-black-black-gold)
Receiver Assembly (2 of 16)
 Install capacitors C3, C4, and C5.
 These capacitors are not polarized. Orientation is not important.
 Solder and snip leads.
 C3, C4 and C5: 0.1 micro Farad capacitors (104 marking)
Receiver Assembly (3 of 16)
 Install volume control R4. Use masking tape to hold in place for soldering.
 Solder all four leads. No snipping necessary.
 R4: 10k Ohm variable resistor.
Receiver Assembly (4 of 16)
White band to the right.
 Install diode D1.
 The diode is polarized. Install with white band orientated as
shown.
 Solder and snip leads.
 D1: 1N4001 diode.
Receiver Assembly (5 of 16)
 Install power switch SW1. Use masking tape to hold in place for soldering.
 Solder all eight leads. No snipping necessary.
 SW1: DPDT switch.
Receiver Assembly (6 of 16)
Notch
 Install 8-pin DIP socket for U3.
 Make sure that socket pins are in a straight row before inserting
into board. Insert socket with the notch pointing up.
 Socket will snap into place.
 Make sure that all 8 socket pins poke through board before
soldering.
 Solder all pins. Do not snip leads.
Receiver Assembly (7 of 16)
 Install D2, the red light emitting diode (LED).
 The LED is polarized. The longer lead is positive (+). Orientation
is marked on the circuit board.
 Insert LED flush to circuit board.
 Solder and snip the leads.
Receiver Assembly (8 of 16)
White bands towards switch
White band
 Install capacitors C1, C2, and C6 as shown above.
 These electrolytic capacitors are polarized. The side with the white
band is negative. The positive capacitor lead is longer.
 Solder and snip the leads.
 C1, C2, and C6: 47 micro Farad capacitors
Receiver Assembly (9 of 16)
 The 5-Volt regulator (U1) is
polarized. Orient with the flat
surface as shown above.
 Insert to this height.
 Solder and snip the leads.
Receiver Assembly (10 of 16)
Shorter leads through circuit board
 Install J2 2-pin speaker header as shown, longer leads on topside
of circuit board.
 Use masking tape or rest on table to hold in place while soldering.
 Solder shorter leads. Do not snip.
Receiver Assembly (11 of 16)
 Install audio jack J1.
 Use masking tape or rest on table to hold in place while soldering.
 Solder the three leads. Holes are oversized. Okay to fill holes
part-way full of solder as shown as long as pins are soldered in place.
 Pins may be snipped.
Receiver Assembly (12 of 16)
 Install receiver module U2 into the circuit board, oriented as shown in the
above images.
 Use masking tape or rest on table to hold in place while soldering.
 Solder and snip the eight leads.
Receiver Assembly (13 of 16)
Solder here
Solder here
 Route 2” of battery
clip wires down through
the inner strain relief
holes as shown.
 Push the bare
ends back up
through the B+ and
B- holes.
 The red lead through
the hole closest to B+
and the black lead
closest to B-.
 Pull the wire,
removing most of
the slack, leaving
small loops.
 Solder wires in
place on the TOP
side of the circuit
board. Snip the
leads.
 Pull on the wires
to remove loops.
Receiver Assembly (14 of 16)
Solder here
 Insert bare end of
 Route free end of antenna
antenna wire into smaller wire up through larger strain
hole as shown above.
relief hole.
 Let circuit board rest
on wires, propped in air
as shown.
 Solder on TOP side of
board and snip lead.
 Pull wire from topside of
board until no loop exists
below board.
 Orient antenna
wire to be vertical.
Receiver Assembly (15 of 16)
Notch
 Install IC U3 in the socket, with the notched end oriented
as shown in the image above.
 The IC pins may be flared outward, wider than the socket
spacing.
 Carefully bend if needed before inserting into socket.
 Check pin alignment before firmly pressing into place.
 After insertion, check to see that no pins were bent.
 Do not snip leads.
Receiver Assembly (16 of 16)
 Attach the speaker to J2 speaker
jack.
 Orientation of the speaker wires
is NOT important.
 Align the holes in the white
connector to pins on the circuit
board.
 Press firmly.
ASSEMBLY IS COMPLETE!
Testing
• Slide power switch to “OFF” position.
• Rotate volume control (R4) all the way clockwise (max
volume)
• Attach a 9-Volt battery
• Slide power switch to “ON” position.
• A loud hiss should be produced and the red LED should
light and vary in brightness.
• If neither happens, TURN OFF IMMEDIATELY and
proceed to the following slide “Troubleshooting”
• Adjust the volume control to a comfortable listening level.
• Test the unit with a CricketSat sensor. You should hear
CricketSat sensors several hundred feet away. May need
to wait 30 seconds for first transmission.
• The range for balloon flights may exceed one mile.
Troubleshooting
• No sound or lights, no smoke
–
–
–
–
–
Insure that slide switch is working properly
Check if battery leads are correctly attached to board, red +, black Check if D1 diode is properly installed, white band is “-”
Check if U1, U2 and U3 are installed properly
Try another battery
• Sound, but no lights
– LED may be installed backwards
• Lights, but no sound
– Turn volume control to a median setting. Should hear hissing
sound.
– U3 may be installed backwards. Check orientation.
• Does not receive CricketSat tones
– Receiver module may be faulty or need tuning
Contact Info
• Michael Fortney
– [email protected]
• UVM CricketSat Website
– http://www.uvm.edu/~cricksat