MAKE: Blog: Mintyboost v2.0 is out

Mintyboost v2.0 is out

The incomparable ladyada tells us:

The next version of the Mintyboost is done and documented. This time it's based on the LT1302 chip instead of the MAX756, which can provide up to 600mA (although I've found that with 2xAA's it doesn't really go past 450mA). The layout was also improved for better efficiency. The upgrade was necessary as the latest Apple products really need a lot of current to charge and hopefully they will work better now!

Kit Upgrade! Mintyboost v2.0 is 2x better

Related:

Comments

Oldest comments listed first.

Posted by: japroach on August 6, 2008 at 11:17 PM

Ok, the caps she used were Xicon 10V 220uF electrolytic (I think PN: 140-XRL10V220-RC).

These appear to have an ESR of ~1ohm at 120Hz. Not sure what it would be at 200kHz, maybe half an ohm or so?

Anyway, the datasheet recommends the output capacitor ESR to be below 0.06 ohm with this design (see pages 7+8). Meeting that would most require a good tantalum or ceramic, which would increase the cost by quite a bit over the xicons.

Subscribe to MAKE Magazine!

Subscribe today, save 42% and get web access to MAKE free. MAKE Digital Edition is available only to subscribers.

$34.95 / 1 year
(4 Quarterly Issues)

Subscribe now

Void your warranty, violate a user agreement, fry a circuit, blow a fuse, poke an eye out... Welcome to the Make Blog!

Features and more @ MAKE!

Get MAKE 14 - Subscribe or on newsstands!

Add MAKE to iGoogle - GoogleGoogle.
Add MAKE to your RSS reader - Real simple.
Add MAKE on Twitter.
Add MAKE on FriendFeed & the MAKE room.

Why advertise on MAKE?
Read what folks are saying about us!

Click here to advertise on MAKE!

Phillip Torrone
Senior Editor
Tel: 707-827-7311

Gareth Branwyn
Robot Maker

Kip Kay
Video Maker

Jonah Brucker-Cohen
Artist / Researcher

Suggest a Site!

Natalie Zee Drieu
Senior Editor
CRAFT

Becky Stern
Culture jammer

Collin Cunningham
Sound Maker

Marc de Vinck
CNC Maker

Current Podcast

MAKE: Television & Project submissions Coming soon!!! MAKE TV! The video (above) is a preview! Each week, Make: television will showcase the best projects from Makers who submit their videos, a segment of the show we call Maker Channel. This segment features the videos... More...

Get the Make blog sent via email

Enter your email to receive the Make blog each day:

WOW! Thanks to everyone involved with Maker Faire Bay Area: attendees, makers, exhibitors, sponsors, volunteers, and crew...it was AMAZING! Over 400 Makers and 60,000+ attendees! Be sure to check out the photos @ Flickr, and our Maker Faire posts for all the action! The next scheduled Maker Faire is Austin: Oct. 18th & 19th, 2008 - Travis County Expo Center!