DIY Toiletry Bag Organizer Insert

I’m a little particular about the products I use, especially those I travel with, and I’m always searching for the perfect stuff.  I thought I had found the perfect toiletry bag last year but I became frustrated that my stuff got tossed around during every trip.  So during a particularly boring day at the lab, I made an insert to keep things organized and save my sanity.

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N Channel Mosfet – Low Side Switch

Here’s my schematic and board design for a simple low side switch using a N channel mosfet.  It’s a simple circuit that has a input for positive and negative and an output for positive and negative connections.  Pretty self explanatory.   It seems like every time I go to work with mosfets I have to spend a good 5-10 minutes reminding myself how they work.  So here’s a reminder to myself for the next time I go looking and maybe it’ll help somebody else out.

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P Channel Mosfet – High Side Switch

Here’s my schematic and board design for a simple high side switch using a P channel mosfet.  It’s a simple circuit that has a input for positive and negative and an output for positive and negative connections.  Pretty self explanatory.   It seems like every time I go to work with mosfets I have to spend a good 5-10 minutes reminding myself how they work.  So here’s a reminder to myself for the next time I go looking.

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Photo Friday – Costa Rica Sunset

This has been a pretty stressful week and as I was flipping through my photos this one caught my eye and took me back to some great memories in Costa Rica last year.  This photo is from the pool of the JW Marriott outside of Tamarindo on the country’s west coast.  While it may not be the most authentic experience, it was extremely relaxing.

January 2016 – Tamarindo, Costa Rica
iPhone 6 camera and slight instagram filer

Riddler Classic – 11-4-2016 – Will You Decide the Election?

Here’s my solution to this week’s Riddler Classic puzzle FiveThirtyEight.  Here’s the question: ” You are the only sane voter in a state with two candidates running for Senate. There are N other people in the state, and each of them votes completely randomly! Those voters all act independently and have a 50-50 chance of voting for either candidate. What are the odds that your vote changes the outcome of the election toward your preferred candidate?  More importantly, how do these odds scale with the number of people in the state? For example, if twice as many people lived in the state, how much would your chances of swinging the election change?”

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Radio Shack 4x2x1 Enclosure Dimensions

I recently needed to use this enclosure from Radio Shack.  I’ve seen them used a ton over the last couple decades but somehow couldn’t find the dimensions, especially the hole spacing.  So I got out my trusty dial calipers and and made my own.  Hope this helps somebody else.

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Riddler Classic – 10-14-2016 – Arbitraria

Here’s my solution to this weeks Riddler Classic puzzle from FiveThirtyEight.  Here’s the question: “While traveling in the Kingdom of Arbitraria, you are accused of a heinous crime. Arbitraria decides who’s guilty or innocent not through a court system, but a board game. It’s played on a simple board: a track with sequential spaces numbered from 0 to 1,000. The zero space is marked “start,” and your token is placed on it. You are handed a fair six-sided die and three coins. You are allowed to place the coins on three different (nonzero) spaces. Once placed, the coins may not be moved. Continue reading “Riddler Classic – 10-14-2016 – Arbitraria”