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Colorado Space Grant ConsortiumColorado Space Grant Consortium
Timing Circuit HW #4
Class #07
Timing Circuit HW #4
Class #07
2
- Your team will do the following:
- Build the timing circuit
Hands-on: Timing Circuit, Power & Camera
3
- Test with 12 V power
Hands-on: Timing Circuit, Power & Camera
4
Parts needed for Timing Circuit Steps:1 Timing Circuit kit
Parts needed for Timing Circuit Steps:1 Timing Circuit kit
Hands-on: Timing Circuit, Power & Camera
5
Step 1a: Layout timing circuit kits and set parts outStep 1a: Layout timing circuit kits and set parts out
Hands-on: Timing Circuit, Power & Camera
Step 1b: Study the PC Board front and backStep 1b: Study the PC Board front and back
Hands-on: Timing Circuit, Power & Camera
NOTE: The following steps are slightly different from those listed on the Velleman box. Both will produce same final product
Step 2: Put connectors together
NOTE: The following steps are slightly different from those listed on the Velleman box. Both will produce same final product
Step 2: Put connectors together
Hands-on: Timing Circuit, Power & Camera
Step 3: Solder connect to board as shown:
NOTE: Velleman instructions are different.
Step 3: Solder connect to board as shown:
NOTE: Velleman instructions are different.
Hands-on: Timing Circuit, Power & Camera
Step 4: Solder relay to board as shown:Step 4: Solder relay to board as shown:
Hands-on: Timing Circuit, Power & Camera
Step 5: Solder resistors to board as shown:Step 5: Solder resistors to board as shown:
Hands-on: Timing Circuit, Power & Camera
R1=R2=R3=1 KΩ
Step 6: Solder diodes as shown (watch polarity):Step 6: Solder diodes as shown (watch polarity):
Hands-on: Timing Circuit, Power & Camera
D2
D3
D1
Step 7: Install trimpots as shown. Do not adjust at this time.Step 7: Install trimpots as shown. Do not adjust at this time.
Hands-on: Timing Circuit, Power & Camera
RV2=50K=PULSE
RV1=1M=PAUSE
Step 8: Install red LEDStep 8: Install red LED
Hands-on: Timing Circuit, Power & Camera
LED: Make sure short lead is installed in hole next to relay (flat side)
Step 9: Install Capacitor C1Step 9: Install Capacitor C1
Hands-on: Timing Circuit, Power & Camera
C1=100 nF
Step 10: Install Capacitor C2 and C3. Watch polarity. Positive lead is the long lead and goes in the positive holeStep 10: Install Capacitor C2 and C3. Watch polarity. Positive lead is the long lead and goes in the positive hole
Hands-on: Timing Circuit, Power & Camera
C3=100 µF
C2=100 µF
Step 11: Solder socket. Be careful of solder bridges.Step 11: Solder socket. Be careful of solder bridges.
Hands-on: Timing Circuit, Power & Camera
Step 12: Install 555 Timer chip. Be careful of orientationStep 12: Install 555 Timer chip. Be careful of orientation
Hands-on: Timing Circuit, Power & Camera
Step 13: Install A23 batteries (12 V) into specially made case
Step 14: Use voltmeter to verify you have 12 V
Step 13: Install A23 batteries (12 V) into specially made case
Step 14: Use voltmeter to verify you have 12 V
Hands-on: Timing Circuit, Power & Camera
Make sure switch is ON
Step 15: Insert the black wire from the battery pack into GND
(Should be “-” of battery).
Step 15: Insert the black wire from the battery pack into GND
(Should be “-” of battery).
Hands-on: Timing Circuit, Power & Camera
Step 15c: Connect the black wire from the switch to the red wire from the batteries by snapping together the connectors
Step 15c: Connect the black wire from the switch to the red wire from the batteries by snapping together the connectors
Step 15b: Insert the green wire from the switch into the +12V terminal on the timing circuit (should be “+” of battery)
Step 15b: Insert the green wire from the switch into the +12V terminal on the timing circuit (should be “+” of battery)
Hands-on: Timing Circuit, Power & Camera
Step 16: Flip switch ON (should here a click and see red LED light up)
NOTE: If not, flip switch OFF and have timing circuit inspected
Hands-on: Timing Circuit, Power & Camera
Hands-on: Timing Circuit, Power & Camera
Step 17: Adjust the pause to get an interval of between 30 and 60 seconds. Make sure that the pulse is long enough that the camera will actually take a picture (somewhere around 1 second).
Step 17: Adjust the pause to get an interval of between 30 and 60 seconds. Make sure that the pulse is long enough that the camera will actually take a picture (somewhere around 1 second).
Hands-on: Timing Circuit, Power & Camera
Step 18: Tape the sides of the battery case and tape the batteries into place
Step 18: Tape the sides of the battery case and tape the batteries into place
Hands-on: Timing Circuit, Power & Camera
Step 19: Disconnect 12 V battery and package everything to bring to class on Tuesday. Make sure the leads of your 12 V Battery are taped off
Colorado Space Grant ConsortiumColorado Space Grant Consortium
Heaters
Class #07
Heaters
Class #07
Hands-on: Heater Circuit
Step 20: Set out kit
BackFront
Hands-on: Heater Circuit
Step 21: Layout Resistors on Perf Board
Hands-on: Heater Circuit
Step 22: Fold over the leads from two of the blocks and solder them together
Hands-on: Heater Circuit
Step 23: Snip the leads that you just soldered together
Hands-on: Heater Circuit
Step 24: Fold over the opposite two leads and solder so that all of the blocks are connected in parallel then clip the ends of the leads
Hands-on: Heater Circuit
Step 24 continued:
4Ω
4Ω
4Ω
Hands-on: Heater Circuit
Step 25: Twist all the Red wires from the 9V connector together and solder them to the single Blue wire in your kit. (Do not solder red wire from switch)
Hands-on: Heater Circuit
Step 26: Twist all the Black wires from the 9V connector together and solder them to the black wire from the switch.
Hands-on: Heater Circuit
Step 27: Solder the single Blue wire from 9V connector to one end of the resistor string and the other Red wire from switch to the other end of the resistor string
4Ω
4Ω
4Ω
Hands-on: Heater Circuit
Step 28: With switch ON, check positive (+) circuit connections with voltmeter.
Hands-on: Heater Circuit
Step 29: With switch ON, check negative (-) circuit connections with voltmeter.
Hands-on: Heater Circuit
Step 30: Put electrical tape on solder joints in Steps 25 and 26
Hands-on: Heater Circuit
Step 31: Attach 3 flight batteries and turn switch on. Your heater will get extremely hot with in 1 to 2 minutes. If longer, please let me know.
Hands-on: Heater Circuit
Step 32: Turn switch off, disconnect the switch from the heater, leave batteries connected