Assembly Manual Mike Fortney 06/26/2006 CricketSat LP

Assembly Manual

Mike Fortney

06/26/2006

CricketSat LP

Index• CricketSat LP (Low Power) Sensor

Parts Map

• CricketSat LP Sensor Assembly

• Testing

• Troubleshooting

• Contact Info

Parts MapPrint out the Parts Map on the following

page.Lay components on respective images to aid

in identification during assembly.

SW1 U2 U1

U3

Antenna Wires

+ -

Switch 5V Regulator Timer ICRF

Transmitter

R1

R2 Red-Red-Green-Gold

R3 Orange-Orange-Yellow-Gold

R4 Brown-Gray-Orange-Gold

R5 Orange-Orange-Red-Red-Brown

R6 Channel Dependent

R7 Orange-Orange-Black-Gold

R8 Blue-Gray-Brown-Gold

C1

C3

C4

C2

C5

C6

C7

+-

+-

+-

+-

+

+

-

-

Speaker

Printed Circuit BoardBattery Clip

J1

U1 Socket

Speaker Jack

D1 LED

D2 Diode

D3 Diode

Notch

Notch

White Band

CricketSat LP Parts MapThermistor

47uF

47uF

47uF

0.01uF

0.1uF

0.1uF

0.1uF

680 Ohm

33 Ohm

33.2k Ohm

18k Ohm

330k Ohm

2.2M Ohm

100k Ohm (@ 25C)

CricketSat Assembly (1 of 16)

Install resistors R2, R3, and R4. Solder and clip leads.

Resistors are not polarized, orientation is not important.

R2, 2.2M Ohm (red-red-green-gold)

R3, 330k Ohm (orange-orange-yellow-gold)

R4, 18k Ohm (brown-gray-orange-gold)


Install resistors R5, and R6. Solder and clip leads.

Resistors are not polarized, orientation not important

R5, 33.2k Ohm (orange-orange-red-red-brown)

R6, Resistor value dependent on channel number. It will be the remaining blue resistor in your kit.


Install resistors R7, and R8. Solder and clip leads.

Resistors are not polarized, orientation not important

R7, 33 Ohm (orange-orange-black-gold)

R8, 680 Ohm (blue-gray-brown-gold)


Insert diodes D2 and D3 as shown above.

Diodes are polarized. Install with white bands orientated as shown.

Solder and clip leads.

D2 and D3: 1N4001 diodes.

White bands to the right.


Install capacitors C5, C6, and C7.

These capacitors are not polarized. Orientation is not important.


C5, C6, and C7: 0.1 micro Farad capacitors (104 marking)


Install switch and timer IC socket. Solder all pins. No clipping required.

Use masking tape to hold switch in place while soldering.

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 14 socket pins poke through board before soldering.

Notch


Install D1, 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 clip the leads.


Install capacitors C1, C3, and C4 as shown above.

These electrolytic capacitors are polarized. The side with the white band is negative. The positive capacitor lead is longer.


C1, C3, and C4: 47 micro Farad capacitors

White bands towards switch

White band


The 5-Volt regulator (U2) is polarized. Orient with the flat surface as shown above.

Insert to this height.



Install J1 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 clip.

Longer leads for speaker connection


Install U3 transmitter module as shown, with the metal can facing the outside of the board.

Use masking tape or rest on table to hold in place while soldering.



Route 2” of battery clip wires down through the inner strain relief holes as shown.

The red lead through the hole closest to B+ and the black lead closest to B-.

Push the bare ends back up through the B+ and B- holes.

Pull the wire, removing most of the slack, leaving small loops.

Solder wires in place on the TOP side of the circuit board. Clip the leads.

Pull on the wires to remove any remaining loops.

Solder hereSolder here


Insert bare end of antenna wires into OUTER holes as shown.

Let circuit board rest on wires, propped in air as shown.


Route free ends of antenna wires up through inner strain relief holes.

Pull wire until no loop exists below board.

Bend the remaining loop as needed to finish task.

Bend the wires to a 45 degree for best performance.

CricketSat Assembly (14 of 16) Install capacitor C2 flush to the circuit board as shown to the right. Wiggle and push as necessary.

Orientation for this capacitor is not important.


C2: 0.01 micro Farad capacitor (103F marking).


Install the thermistor, R1 as shown.


R1: 10k Ohm thermistor at 25degrees C.


Install the TS556 timer IC, U1 as shown.

Pins are flared outward. May need to slightly bend inward before inserting into socket.

Check alignment before pressing into place.

Testing• Slide power switch to “OFF” position.• Attach a 9-Volt battery• Slide power switch to “ON” position.• Wait up to 30 seconds for the LED to turn on briefly.• If the LED does not light, proceed to the next slide,

“Troubleshooting”• Connect a speaker from the receiver kit to the speaker jack

(J1)• You should hear a faint tone periodically. Remove the

speaker to enable the LED and RF transmitter to operate.• Test the unit with a CricketSat receiver. You should be

able to monitor CricketSat sensors several hundred feet away.

• 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 and D2 diodes are 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 receiver sound– Turn volume control on receiver to a median setting.

Should hear hissing sound.

Contact Info

• Michael Fortney– [email protected]

• UVM CricketSat Website– http://www.uvm.edu/~cricksat

Documents

Assembly Manual Mike Fortney 06/26/2006 CricketSat LP