Enthusiasts Joe and Brad designed a clever, electronically controlled, two-stage model rocket powered by a 9V NiCad battery. The heart of the electronic control system consists of a small FPGA with a soft-core processor that runs the control algorithm and logic. It uses a PWM signal from an accelerometer to determine the rocket's acceleration to trigger the ignition of the rocket motor in the second stage, separation of the booster from the sustainer, and the deployment of a parachute that allows the rocket to float gently back to earth.
|Two-Stage Model Rocket Parts List (Main Board)
|Part Description||Allied Part #|
|10K O resistor||895-2676|
|49.9K O resistor||895-2440|
|200K O resistor||895-2406|
|68 O resistor||895-2892|
|0.1 muF 25V ceramic capacitor||213-0110|
|10 muF 16V tantalum capacitor||644-1026|
|2x8 pin header||518-22331|
|2x5 pin header||518-22331|
|1x3 pin header, middle pin pulled||518-22252|
|1: 518-2233 is a 2x36 header. Cut it down to create the 2x8 and 2x5 headers.|
|2: 518-2225 is a 1x36 header. Cut it down to create the 1x3 header.|
Additional parts required for main board: Altera EP1C3 cyclone FPGA; Altera EPCS1 configuration flash; 40 MHz Osc, Epson SG8002CA; Max 604, linear regulator. (Note that several of these components could be replaced with components offered by Allied with minimal redesign or verification.) See website for daughter board parts list.