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November 13, 2007
about 8 years ago
Can anyone who has this tell me what part number the "MAX232" chip part number is?
I was just browsing stuff on SF and came across this and something that popped out to me is the 4 tantalum caps connected to the converter IC. Usually there are 4 caps like these for boosting the supplies positive and negative to produce the required RS232 voltages right, and most IC's these days recommend 0.1uF ceramic.
For some reason they have gone with tantalum., which are polarised, and it looks like they have the polarization wrong? Two of the four would be on the negative voltage rail, thus their positive tab should be connected to ground...
Or is this IC different to all the others?
News - Voltage Divider App for i…
about 11 years ago
Sparkfun is dedicated to sharing the collective knowledge of its members, but I guess some people dont really take that to heart. _
Sparkfun are dedicated to making money.
They're probably getting a cut out of this, there's plenty of better and free apps, but they choose this one why? Puhlease.
about 12 years ago
"The sensor provides very accurate readings from 0 to 765cm (0 to 25.1ft) with 1cm resolution."
This might be misleading, from the datasheet:
"Objects from 0-cm to 20- cm range as 20-cm"
So it should be 20 to 765cm :(
about 12 years ago
Ouch, and that's one badly (auto)routed board too!
News - Solar Economics
about 13 years ago
You can do so without posting a comment by clicking on the > next to Comments :)
The prices listed shows the cost of the PV's themselves, what about regulators, inverters, batteries, installation and a grid-connect system?
However if you're on the grid you can do without batteries, but will still need a load balancing system or device to feed excess power back into the grid.
No public wish lists :(