How to Multiply The Frequency of Digital Logic Clocks Using a PLL

This is our third entry in the our series on digital clocks - those predictable duty cycle square waves that have improved modern life so immensely.  We first showed you how to multiply clocks using only digital logic.  Then we moved on from the hacks to a more useful application - dividing clocks using digital logic. Today, we throw off our … [Read more...]

How to Divide The Frequency of Digital Logic Clocks

One of the issues you'll quickly run into as you tackle more and more complex projects in your electronics hobby is the need to run things at different speeds.  As time is the essence of digital logic - in fact, logic itself relies on having discrete periods of time in which to switch bits between 1s and 0s - you'll start to want to explore … [Read more...]

How to Produce 640×480 Color VGA Video From an 8-Bit Arduino!

Update: I bought some components and broke my "use what I currently have" rule to eliminate two pieces of silicon from the original build.  I've attached an updated schematic if you would like to build the smaller version - the code doesn't change. Let me set this up for you: most 8-bit AVRs in the wild (I happened to use an Arduino Nano for … [Read more...]

The DQYDJ Weekender 6/15/2013

Ahh, another weekend in the Bay Area - this one with lots of open homes in my own neighborhood.  Boring?  I know - but, hey, spying on the improvements my neighbors make is fun. Speaking of spying, let's talk informally for a bit about the NSA's recently revealed spying programs... and of a compliant press corps tripping over each other and … [Read more...]

The Earth Is Flat! Why a Flatter Tax Code is Better (The No Math Edition!)

"Cut rates and eliminate deductions", as a bumper sticker (ahem, Twitter) length quote, started to reenter the public consciousness again during the recent Presidential election.  The phrase came to be associated with Mitt Romney, although, to be fair, he was almost forced into a position on rates by refusing to detail his stance on taxes during … [Read more...]

Sports Gambling and Live Markets

Is sports gambling beatable? Casinos, over the years, have traditionally thought of sportsbooks as an amenity to offer to their customers as opposed to a real way to make money. They cap the bets made on traditional over/unders and to people who consistently win in sports gambling (known as 'sharps'). The casinos believe that sports gambling is … [Read more...]

S&P Ratings Cuts in Europe

Well, S&P has finally done it - it cut the credit rating of nine European countries in response to the sovereign debt crisis in Europe. Two of those countries, France and Austria, formerly held AAA ratings, the highest grade which S&P assigns to sovereign debt (read: the lowest default risk). You know that DQYDJ thinks rating the debt of … [Read more...]

Industrial Organization and Oil Prices

Great attention in major media sources has been called to the recent dip in oil prices (CL1Q) which peaked at over $114 per 159 liters of light crude. It is hovering around $94 now, which is a decrease of over 16% from the peak. Traditional thinking claims that gas prices typically peak in the summer months due to more gas being used during holiday … [Read more...]

Facebook vs the IPO

And just like that, soon after this article was published, documents revealed that Facebook planned to hit the 500 private investor cap in 2011, requiring them to disclose financial information or go public soon after. At this hour, Facebook is still mum on which of the options it is planning on choosing. The dates you should circle?  April 2012- … [Read more...]

Start at the Source

Not all of us have surplus money stacked up under our mattresses.  But it isn’t very hard to believe that after careful budgeting and hard work we can put away some money for the future.  When we finally get to this point some of us see many opportunities and are unsure of what to do with our money.  Personal investing can be a very opportunistic … [Read more...]