Category Archives: SUNDAR

SUNDAR Update

Posted on October 1, 2013 by Skye Sweeney

After etching the pre-amp board and populating it with parts, my quick test showed that the device did not work. No smoke, but no amplification either. And then some personal issues came up that I had to take care of. … Continue reading →

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Drilling and populating the SUNDAR PCB

Posted on September 10, 2013 by Skye Sweeney

Last night I stopped at Harbor Freight and picked up a ‘set’ of solid carbide drills. To call them a set is a silly as each package has 20 random sized bits. But since the packaging is clear, you can … Continue reading →

Posted in FIRST LEGO League, Robotic DVD burner, SUNDAR | 1 Comment

SUNDAR PCB using Press-and-Peel

Posted on September 9, 2013 by Skye Sweeney

I was unwilling to send out the PCB for the SUNDAR radar head to a fab house. I only need one and why spend precious money that I could use elsewhere. So I tried out the Press-and-Peel method for etching … Continue reading →

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SUNDAR update #2

Posted on September 6, 2013 by Skye Sweeney

I took a few weeks off for vacation and to get my son ready to go to Europe for two years to complete his master’s program. I have a few things left to clean up before I can start back into … Continue reading →

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SUNDAR update

Posted on August 2, 2013 by Skye Sweeney

Today I replaced the opamps with the new ones I just got from Analog Devices. These were SMT parts and I had to solder them to DIP adapters. But they share the same pin outs as a DIP, so the … Continue reading →

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GPS error

Posted on July 31, 2013 by Skye Sweeney

Towards my goal of entering the AVC competition in 2014, I have been evaluating GPS units. The current model I am looking at is a u-Blox LEA-6H with a patch antenna. The first test I tried was to hold the … Continue reading →

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Opamp trouble

Posted on July 27, 2013 by Skye Sweeney

Been working on the two stage opamp for my Sundar. The first stage takes the current from the photodiode and turns it into a voltage with a certain amount of gain. The second stage applies a second gain as well … Continue reading →

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SUNDAR update

Posted on July 18, 2013 by Skye Sweeney

Been working on my SUNDAR in what little free time I have these days. Last night my Digikey order came in and I was able to get the dual channel digital potentiometer working. This will be used for a software … Continue reading →

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SUNDAR project

Posted on July 10, 2013 by Skye Sweeney

In the interest of trying to determine my heading for the AVC robot competition, I have been working on a celestial solution. I am calling this device a SUNDAR as a hybrid of SUN and RADAR. In essence I am … Continue reading →

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