AAE450 Spring 2009 [Tony Cofer] [Power]

Power Group

Tony CoferLander Nightime Shutdown

02/19/09

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AAE450 Spring 2009

Nocturnal Power Controller Save 11.5 kg Controllable Cost < $10 Size 2X2X1/2” Weight~20 g Power diss. 0.1mW Requires 0.23 g battery

[Tony Cofer] [Power]

ControllerInterface

Solar Source

Comparatorw/hysteresis

Actuator

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AAE450 Spring 2009

Basic Circuit

Direct Addressing

Variable Limits

[Tony Cofer] [Power]Page 3

AAE450 Spring 2009

Backup slide Parts and Price list 4081 Quad AND gate $0.59 4009 Hex Inverter $1.25 MC33102 sleep mode op amp $2.25 4066 quad line driver $0.63 4068 dual D-latch $0.44 Resistors 4 X 100k,2 X 2 meg $1.00 2 “X 2” circuit board $1.50 Total $7.66

[Tony Cofer] [Power]Page 4

AAE450 Spring 2009

Backup Slide - Actuators

[Tony Cofer] [Power]Page 5

Common RelayPower Mosfet

Pulse shut-off/turn-on