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August 29, 2013
I’m also on the EEVBlog forum as MrAureliusR. Just discovered SparkFun – what a handy website! The breakout boards in particular are extremely handy. Will be ordering many things soon!
Not to burst your bubble, but when operating from a battery source capacitors are completely unnecessary on a regulator. Also, I’d highly recommend using AAs instead of 9V, the capacity of 9V batteries is actually much lower than what most people think.
What are you confused about specifically? You connect the pins on this to any GPIO pin, and then control them from software.
Should have just bought a Bus Pirate.
Again, why not just use a Bus Pirate?!?
I’d also agree with the skill levels being wrong… no programming required, and the prototyping skill level should be higher as there’s some long math equations involved. Plus you could (potentially) be dealing with dangerous voltages and currents.
Even at low currents, that zener is going to COOK. Just pick up a small transformer, they’re cheap.
I don’t understand, why wouldn’t you just buy a Bus Pirate for the same price?
about a month ago
It’s definitely needed. That integrated diode is what’s called a ‘body diode’ or ‘parasitic diode’ which cannot handle large currents at all. It’s just an effect of the MOS manufacturing process.
You certainly didn’t need the high-power version to drive an LCD
about 2 months ago
People – you need to read the datasheet more closely. These DO NOT produce 50uA at 4V. 50uA is the SHORT CIRCUIT current. At that current the voltage would be in the millivolts. In practice, you’d probably get a few microamps out of them. However, use one of these to charge a supercap and you might be able to run a super-low-power microcontroller for a few ms every couple of minutes. Would be very cool to see what kind of limits you could push with this thing.
If I had just a little bit more moolah, my lab would be THIS...
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