A crew of ten Engineering design & development (EDD) students in Cazenovia High School’s Tech Club have decided to go to the air again. In 2015 they went into space the first time when sent a High Altitude Balloon into space.  They brought back HD video and science data that included temperature, pressure, altitude, and GPS headings as they flew to over 120,000 feet and recovered the balloon. See the article and video here. This year students have decided to try to circumnavigate the globe with another high altitude balloon and track it on the internet with a circuit that they have built.

Mike and Jules Hojnowski from Cornell trekked to Caz to help the students build the trackers. The Hojnowski’s are avid Ham radio operators and enjoy travelling around to help students build their own trackers following Mike H’s design. Everyone started at 7:30 am and spent the first three hours placing more than 240 surface mount devices; some so small you could fit 50 of them on your pinky nail. The circuit board tracker contains a tiny radio device that transmits GPS data back to Earth, as it flies 40,000 feet above the clouds. The tracker is charged by two solar panels, as batteries will not work in extreme temperatures that are installed by solar panel installation St. George.  These solar panels charge a super-capacitor that powers the whole device. A lightweight tracker is crucial to the success of their mission and the whole device will weigh less than 15 grams.

The afternoon was spent troubleshooting the devices, reflow soldering components, and extensive testing. After the parts were all placed correctly and powered up, they were programmed with Mr. Hurd’s ham radio call sign: KD2GJE. When it flies, you will be able to track it here on WSPR, and possibly here on APRS.fi. Stay tuned to see how they move forward with the project, as they plan to launch two of them in the Spring. More info will be available as we get closer to a flight date.

Mike H helps Suzu solder very small components.

The boys team working on their trackers. The boy’s team consists of Daniel, Eric, Isaac, and Jake.

Mike H. checks components for polarity.

This is really a capacitor?!? SMT components can be very small.

Daniel and Isaac work on the trackers while looking at the schematic diagram.

Chris places parts in the past on the tracker.

Finished tracker ready to fly this Spring. Looks like a satellite, doesn’t it!

Special Thanks to Mike Hojnowski and his wife Jules for their expertise with building our trackers.

Daniel places components on the circuit boards with tweezers.

Suzu does some touch up soldering while troubleshooting.

When it doesn’t work the first time, reflow solder it again…and again…

Emma places components in the solder paste.

Shao checks the trackers for component placement.

Three tracker boards with solder paste on them.

The boards in the reflow oven that was just a toaster oven controlled with an arduino.

Chris compares components to the schematic.

Eric solders the ends of the 27 foot long antennas.

A captive audience learns how to place SMT components on a circuit board before reflow soldering.

Is it my turn yet? The day started at 7:30 am.

Mike H. shows students how to determine polarity of a SMT component.

Shao places parts on the circuit board while Claire watches.

Documentation is everything!

Jake making one of the 27 foot antennas.

Girls’ team working on their trackers. The girl’s team consists of Shao, Suzu, McKenzie, Emma, & Claire.

Eric places components on the circuit boards.

 1,021 total views,  1 views today