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LUC POWER DISTRIBUTION BOARD

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From a 7.1V (full charge 8.5V) NiCd battery 5V regulated output was required to supply to all the components. For this purpose LM7805CT is  used since it operates in the 7V- 12V range. 
The current drawn by peripheral components on LUC is
  • 0.005A for Telephone
  • 0.005 for Cymbal switch
  • 0.016A for LEDs
  • 0.01A for Microphones0.0002A for the PIC 
i.e., 0.032A in total and that implies 340mAh
The NiCd battery has 1500mA capacity, hence for surviving 8hrs two batteries were used.

Drums circuit

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The circuits are designed as per the standard test circuit for the microphone EE-99-R. The operating voltage range of this microphone is 1.5V to 12V.  The gain required was 100 and since the LM324N has a typical voltage gain of 100 it is chosen as the amplifier.  For  a gain of 100, Rf / Ri =100 . The resistors Rf, Ri chosen to satisfy this condition are 1M and 10K respectively.  For a Vref of 2.5V two resistors of same value 10K each are used. 

Speed control display Circuit

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This circuit is used to glow the LEDs as shown in the figure below.

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HCT244N is used to drive 8 LEDs. The Vout of HCT244N when high is Vcc and in this case 5V.
  • Vf of the LEDs = 3V
  • Max current = 20mA
  • Rmin= 100 ohm
For getting maximum brightness a value of minimum resistance (100 ohm) is used for all the resistors.

Cymbal Circut

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Telephone Circuit

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LUC OVERALL CIRCUIT

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E128 PIN table

JP6 Pin Label JP6 Pin No. Use JP5 Pin Label JP5 Pin No. Use
NC 1 GND 1
PU7 2 LED 7 PS2 2 Xbee Rx
PU6 3 LED 6 PS3 3 Xbee Tx
PT0 4 LED 8 PP2 4
PT1 5 PP0 5
PT2 6 PAD0 6
PT3 7 Drum left PAD1 7
PT4 8 Drum right PAD2 8
PT5 9 Telephone PAD3 9
PT6 10 Cymbal GND 10
PE0 11 GND 11
NC 12 PAD7 12
NC 13 PAD6 13
PE1 14 PAD5 14
PT7 15 PAD4 15
PE7 16 PP1 16
PU0 17 PP3 17
PU1 18 LED 1 PP4 18
PU2 19 LED 2 PP5 19
PU3 20 LED 3 20
PU4 21 LED 4
PU5 22 LED 5
GND 23
NC 24
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