CricketSat Construction. Parts List Monday June14, 2013CricketSat Assembly2.

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Presentation transcript:

CricketSat Construction

Parts List Monday June14, 2013CricketSat Assembly2

Altium Monday June14, 2013CricketSat Assembly3

Schematic Monday June14, 2013CricketSat Assembly4

Follow the GUIDE Monday June14, 2013CricketSat Assembly5 Now, Use your CricketSat construction guide to build your CricketSat Pay close attention to the components that MUST go in correctly – 8 pin socket and LED

Follow the GUIDE Monday June14, 2013CricketSat Assembly6 Its easy to confuse the Thermistor with the ceramic capacitors. The Thermistor is darker orange/red and has longer legs.

Tips for the thermistor Monday June14, 2013CricketSat Assembly7 The thermistor (R2) is connected here.

Trouble Shooting Monday June14, 2013CricketSat Assembly8 Check all solder joints to make sure that all have complete coverage of the via. Make sure there are no bridges (overlapping) solder between connections.

Monday June14, 2013CricketSat Assembly9 Once you’ve successfully completed the build of your CricketSat – take lots of selfies with your CricketSat and post!!

Monday June14, 2013CricketSat Assembly10

Monday June14, 2013CricketSat Assembly11

Monday June14, 2013CricketSat Assembly12

Monday June14, 2013CricketSat Assembly13

1. Tum the switch on in this position. 2. If the LED lights up, go to the next page..3 If the LED does not lights up, you got big troubles, but we will tell you how to fix it. See page 13 for trouble shooting your CricketSat. Of f O n

1. Turn multimeter to Hz%. 2. Connect black lead to pin 1 of J2, Connect red lead to pin 2 of Je. 3. You should read between 1,1000 and 1500 HZ. If you do, you are now ready to calibrate your CricketSat – another document. 4. IF you read zero Hz, then go to page 13 to trouble shoot your CricketSat. Of f O n

1. Turn off the switch. Remove he LM555 from the socket. 3. You must to re-inspect the bottom of you PCB to make sure you have good solder joints on everything and not bridges. If you find problems and fix them go back to page You will now use your multimeter to check to make sure the circuit has the proper continuity. See page 14. Trouble Shooting your CricketSat Of f O n 2. REMOVE the battery. 5. In all your trouble shooting, keep notes on all of the measurements you make.

1. Be sure your CricketSat is turned off. Remove the LM555 from the socket. 3. Turn the meter switch to the diode/buzzer position. Short the read an black leads together and press the diode/busser button until you hear the buzzer. 4. You will now use your multimeter to check to make sure the circuit has the proper continuity. See page 14. Trouble Shooting your CricketSat Checking continuity Of f O n 2. REMOVE the battery.

1. Put the multimeter lead in the socket pins 4 and 8. See pin labeling below, right. Buzzer should sound. 3. If you do not get continuity, then check the PCB to determine what is wrong. Trouble Shooting your CricketSat Checking continuity Of f O n 2. These pins are connected together on the PCB (see schematic circled) and thus shorted or have continuity between them Continue checking other pins: 2-6 Ground on PCB to other pins: To J2 pin 1 To J1 pin 1

1. Be sure your CricketSat is turned off. Remove the LM555 from the socket. 3. Turn the meter switch to the resistance - ohms position. Short the read an black leads together and press the range button until you read zero. 4. You will now use your multimeter to check to make sure the circuit has the proper continuity. See page 14. Trouble Shooting your CricketSat Checking Resistance Of f O n 2. Make sure the battery is removed.

1. Put the multimeter lead in the socket pins 7 and 8. You should get what? Look at the schematic – 2.7k ohms. Trouble Shooting your CricketSat Checking Resistance and Capacitance Of f O n 2. Next check between 7 and 6. You will be reading the thermistor ~ 10k ohms at room temperature Continue checking other pins: 3 to pin J2 pin 2 – 330 ohms You can not check resistance across a capacitor or a diode with the resistance setting on the multimeter. Use the capacitance setting on the meter to check capacitance. 4. If you find errors, maybe a bad component or wrong component.

1. Put the battery back in and turn the switch on. Trouble Shooting your CricketSat Checking Voltages Of f O n 2. Turn the meter to Vdc and check between pins 1 and 8 on the LM555 socket. You should get approx. minus 9v. Minus because the red lead is on the ground connection. If voltage is below 9v, change batteries. 3. Look at the schematic and determine other places where you should also get 9v. If no voltage, trouble shoot. What is cause? 4. If you find errors, maybe a bad components. wrong components or bad connections.