Monthly Archives: December 2013

Ground Station Power Supply Modifications

I initially used a 3amp LM7805 regulator to provide the 5 volts to the Beaglebone Black (BBB). This regulator will not work unless the input voltage is at-least 6.5 volts. So a 6 volt battery is not much use. So … Continue reading

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Creating the Balloon cutdown Mechanism

The cut-down mechanism is an extremely important component of the high altitude balloon. Getting a reliable cutdown mechanism is something that was considered difficult. Initial thoughts were to have some external ‘sleeve’ that would wrap around the balloon throat, using … Continue reading

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Installing the new GPS Module

I’ve realised the that the current GPS module only goes up to about 18km. This is not high enough. So I discovered a module that can go up 50km. This module is different from the current one because it doesn’t … Continue reading

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Radio Test 3

I’ve devised my own firmware for the RFD900 with changes I shall not divulge here. Fortunately the changes have been effective. I’ve been able to download an image 4.5km away in 8 minutes. The link was substantially more stable. It … Continue reading

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