ladyada

12 ms·

61.
by ladyada 17y ago
for a PC switching power converters, such as in this article? sooo...where are you buying these mystical 2200uF ceramic caps? :)
62.
by ladyada 17y ago
argh. how does one delete comments? i refreshed by accident :(
63.
by ladyada 17y ago
what would you use? tantalums? ive have the joy of recovering old equipment with dried tant caps on the power rails. (23 of 'em!) maybe tants are made better these days...
64.
by ladyada 17y ago
what would you use? tantalums? ive have the joy of recovering old equipment with dried tant caps on the power rails. (23 of 'em!) maybe tants are made better these days...
65.
by ladyada 17y ago
What I'm saying is, dont double your materials cost, thats not nearly enough. You need to add margins TWICE - two 40% margins. Thats 3x material cost, 4x is even smarter. Skimping on margins kills, you can -always- lower the price later.
66.
by ladyada 17y ago
Although it may seem like an irrelevant point, I'm guessing the price was a big contributor to the project death. Why? because when you say up front (with no experience in hardware/manufacturing design) that you're going to sell it for $x t
67.
by ladyada 17y ago
I'm a major fan of ServInt...after being nudged off LaughingSquid for taking too much bandwidth I was pointed to (mt) but found they didn't do server-side backups and were demure about their tech support. Servint is more expensive and its
68.
by ladyada 17y ago
A big part of it is power supply (a tablet ps is extraordinarily hard to design whereas this can run on a large coin cell or AAA battery), and display (blinking LEDs are easier to get a hold of than nice color LCD with good touchpads).
69.
by ladyada 17y ago
cant. they chose a "non commercial" license.
70.
by ladyada 17y ago
right now, making an x-y plotter tends to be an exercise in reinventing the wheel. this is so utterly cool, it made my day...i love to see open source hardware projects! if makerbeam is successful as well it could really make OSH robotics c
71.
by ladyada 17y ago
These boards are not as much competitors to the Arduino, they are upgrades. And they're quite hard to use if you've never done any electronics. Which is why you'll see everyone start with Arduino and then eventually move up. Besides, if som
72.
by ladyada 17y ago
"It isn't too hard to build your own PIC or AVR programmer on a veroboard and start hacking. " Actually, it is. People who are 'starting hacking' dont know how to hack, so they dont clock, power or wire their chips correctly. They don't hav
73.
by ladyada 17y ago
a PC doesn't have analog inputs, cant do PWM outputs, struggles with protocols like i2c, isnt realtime. but it is: loud, hard to enclose nicely, costs more and requires maintenance.
74.
by ladyada 19y ago
33% margin? sounds rather optimistic as most people struggle for profitability...
75.
by ladyada 20y ago
"Bloggers aren't responsible for things said in their comments." Sure they are! It's their site, & they have moderation control. Bloggers always delete comments, either spam, off-topic or otherwise.
76.
by ladyada 20y ago
If you want a company, not just a startup: anything from Nolo press