n1ist

Member Since: May 31, 2006

Country: United States

Profile

Role

Hardware/embedded firmware design engineer

Websites

www.barc.org

  • The animated Christmas lighting folks have figured out the Disney ones… http://doityourselfchristmas.com/forums/showthread.php?25142-Glow-with-OUR-Show-and-MSP430G2553-discussion&highlight=disney

  • Another project from the annals of Popular Electronics - the Cyclops camera from the February 1975, though it wasn’t for COCO. It generated x/y/z to drive a scope. A whopping 32x32 pixels.

  • I remember Forrest Mims writing about this in Popular Electronics back in the 70s… He had a project that used a single LED for both transmitting and receiving audio. Even ended up suing Bell Labs when they stole his idea.

  • It is NO. To control 240V, you would need two. If the load doesn’t use the neutral, you could get away with one, but that would be against NEC and a safety hazard as the load would still be live with respect to ground or neutral when turned off. If you are in a country where one side of the 240V is ground-referenced, then you would only need one.

  • Why is one pin cut off from the processor chip? There’s certainly enough space on the board to have included the pad for that pin…

  • It would be nice to have some way of combining the shipping for the hourly discounts. Now, you had to pay shipping once per purchase (ie, once per hour) even if you only wanted one board from that batch of discounts. It wiped out the savings on some of the smaller items.

  • When mounting this board, use nylon screws. The screw heads come way too close to the high voltage traces and could electrify your enclosure.

  • When wiring the GFCI, make sure the neutral wire (normally white or blue) is connected to the silver-colored screw. It looks like it may be backwards in the picture above, and if so, can be unsafe.

  • In your schematic, you have Aref tied high. If the ref mux isn’t set to external reference, you can be drawing some current thru it (worst case, if you set it to internal reference, you are tying the output of the on-chip bandgap to Vcc)

  • Amazing what you can do with an Arduino these days…

No public wish lists :(