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L298N dual full-bridge motor driver
Two years ago, I designed my own motor driver breakout board using two L298N motor driver ICs and had them manufactured through BatchPCB. Here it is, finally finished. L298N motor driver, designed and...
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LSM303DLM Breakout
Sensors are cool, but the really cool ones come in tiny packages that require breakout boards to be easily usable. I often buy (populated) breakout boards from one of the many hobby electronics vendors...
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Powered by Apple! (Running my kiwi drive robot off a MacBook Pro battery)
A few months ago, a friend had a MacBook Pro battery that started swelling up. He agreed to let me have it, and now it has wheels: Kiwi drive robot, now powered by a MacBook Pro battery. The battery is...
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DIY PCB Etching: Test Run
I found some one-sided blank PCBs on eBay. They are only half as thick (0.0225″) as the ones found in most electronic devices, but I don’t need much more yet. Blank PCBs. Came with a pair of cloth...
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DIY PCB Etching: Safety Lessons Learned
I wondered for a while about the title of this post, because I have actually learned very little in terms of safety. After all this, I know I’m still not going to use a fume hood, I’m still going to do...
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DIY PCB Etching: Not Electrolyzing Salt to Make Cupric Chloride
The tutorials use hydrochloric acid and hydrogen peroxide as the starting etchant not because they aren’t adventurous but because that is what works best (as opposed to using electrolysis). The...
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DIY PCB Etching: Collecting Chlorine Gas (Read: DON’T)
tl;dr: There are much more efficient ways in which to produce chlorine gas than by electrolysis, so stop hoping and go buy some hydrochloric acid. I ultimately did not achieve anything practical by...
View ArticleDIY PCB Etching: Colors of Compounds and Helpful Links
UPDATE 11/10/11: Although most of these colors are accurate when dealing with concentrated solutions of salt, some are not (e.g., descriptions of copper (I) and (II) chlorides are mixed up). Take it...
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DIY PCB Etching: Electrolyzing Salt to Produce Cuprous Chloride
tl;dr: You cannot produce an effective cupric chloride etchant using only salt, copper, and electricity. Yet I spent a week trying to do just that. Essentially, I wanted an effective etchant-producing...
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DIY PCB Etching: Overview and Production of Ferric Chloride
I liked the look of the LED-outlined propeller, so I decided I would etch my own PCBs to make it easier to light up all three propellers. I’ve spent the last week researching DIY PCB etching methods...
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