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August 7, 2006
News - Designing for Graceful Fa…
about 5 months ago
In terms of fault tolerance, error recovery, and just about every other aspect of a design, I ask myself: “Does it matter to the customer?”
Does the customer care how fancy my algorithm is?
Does the customer care about some obscure error code, or should I just do something reasonable and keep going?
Does the customer really care about a bunch of detailed status messages?
Did I leave my fascinating debug code in place that stops a device working and pisses my customer off?
News - Your June Caption Contest
about 11 months ago
Same here. I have gotten some nice beefy gear motors from Pololu. They also have drivers, controllers, encoders, etc.
Granted, but the only “food safe” part is the tubing. Also, see my comment above about the additional parts and software. I figure the additional parts would only be $30, so you’d still come out ahead. OTOH, there’s some value to getting a working setup.
I have some experience with this type of pump in prosthetics R&D. I use it in a manikin to deliver fake sweat at a precise rate. This type of pump is also used as a vacuum pump in prosthetic applications. The pump is so simple to build that it hardly seems worth the price quoted here. I don’t see much added value in the processor, motor driver, etc. since you can get them for 20 or 30 bucks. Not that hard to calibrate it using an 8 oz. coffee cup, since it’s not lab grade anyway.
I really like this kit, and the specs look really good for general use…. I ordered one for my lab assistant.
Looking over the design specs, it looks like it’s made for easy modification. I’d probably replace the push buttons with some knobs. I got one of those Nano V3 scopes from Sparkfun to play with, and I never use it because it’s too slow and clumsy to navigate through all the menus.
P.S. About dual channel: The schematics show that most of the guts of the thing are taken up with the single channel circuitry (see the link above). Maybe a cheap way to add a second channel would be to order two of the kits and modify the software to multiplex them onto a single I2C bus LCD somehow.
about 2 years ago
Just ordered this for my birthday present. I wanted a heavy bag, but my wife said I had to get something practical. :)
about 3 years ago
Here’s a USB->WiFi adapter based on GS1011M that I found in a quick search. Key thing is that this one has an AT style interface so you could easily connect it to an Arduino-type environment without the need for drivers. http://www.arduino.com.au/Data/USB-WIFI.pdf
Agree with VccDood. If the Imp just had the wifi drivers and the serial interface without all the programming/serial numbering/cloud stuff then I’d prefer that for connecting with an Arduino-like environment. Otherwise, I’d just use a wifi shield for prototyping. To go super-compact, I’d be much more inclined to spend $15 to $20 on a micro USB dongle (e.g. http://www.mobilefun.co.uk/usb-wifi-dongle-p11590.htm) and get the stack working than to try something like the Imp. Arduino-ish already has IP and USB connectivity, so it shouldn’t be all that hard to get a dongle working. Google “arduino wifi dongle” and you can see folks are already working on it either via USB or Ethernet to the dongle.
News - New Product Friday: Poetr…
about 3 years ago
Here is an online example: http://www.smalltime.com/haiku.html
No public wish lists :(
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