Search found 64 matches

by effgee
Wed Nov 14, 2012 1:07 pm
Forum: Product / Device Ideas
Topic: stackable I2C motor shields/brushed DC servo driver
Replies: 9
Views: 7187

Re: stackable I2C motor shields/brushed DC servo driver

csconsulting wrote: brushed DC with feedback or stepper motor control.
Stumbled across this dual-full bridge chip from Ti, which could do both
http://www.ti.com/lit/ds/symlink/drv8412.pdf
since it includes current limiting.

3A & 7A versions, up to 52V supply. Looks promising.
by effgee
Tue Nov 13, 2012 9:59 pm
Forum: TS: Terminal Shield
Topic: feedback on protomega
Replies: 6
Views: 7142

Re: feedback on protomega

cef wrote:when he's not flat out. ;)
like sometime 2027, when he's retired ;P

You've pretty well got it covered, thanks cef. I'm sure Jon's got far more important things to do.
by effgee
Tue Nov 13, 2012 11:04 am
Forum: Random Chit-Chat
Topic: Sorry for the silence
Replies: 19
Views: 12664

Re: Sorry for the silence

cef wrote: it's a constant battle. Hopefully though, we'll make a big dent it in soon.
You must be doing a fine job, I haven't seen any spam here.
Well done, and keep up the good work.
by effgee
Tue Nov 13, 2012 10:46 am
Forum: TS: Terminal Shield
Topic: feedback on protomega
Replies: 6
Views: 7142

Re: feedback on protomega

Thanks for the reply. They're advisory use only (ie: not connected to anything Thanks for the clarification. Guess I should have checked the schematic first. Usually it also indicates pin 1 of a connector. Thanks - I kind of suspected that, but was a little confused by D36 & D37. Still am. The Eagle...
by effgee
Tue Nov 13, 2012 3:34 am
Forum: EtherMega
Topic: EtherMega now has micro USB jack...
Replies: 0
Views: 1973

EtherMega now has micro USB jack...

..and there was I about to ask "what am I supposed to do with all these spare mini usb cables ?"...now the answer is obvious - spare phone charger/data cables!

Love it !
by effgee
Tue Nov 13, 2012 3:26 am
Forum: TS: Terminal Shield
Topic: feedback on protomega
Replies: 6
Views: 7142

feedback on protomega

Hi no dedicated forum for the proto shields, I thought this was the closest. Please move if required. + love that it fits within the shadow of the ether mega + love the fact it doesn't foul the ethernet port - would have preferred if (no sniggering now) long-legged female headers were provided, so I...
by effgee
Tue Nov 13, 2012 3:01 am
Forum: Product / Device Ideas
Topic: stackable I2C motor shields/brushed DC servo driver
Replies: 9
Views: 7187

Re: stackable I2C motor shields/brushed DC servo driver

The other problem is random currents floating around your earth and power. The idea is to supply motor power (typically 24V, maybe higher) completely separate from the micro power, with jumper selection of the 5V rail to come from either the onboard switchmode voltage regulator or the 5V pin on the...
by effgee
Mon Nov 12, 2012 12:58 pm
Forum: Product / Device Ideas
Topic: stackable I2C motor shields/brushed DC servo driver
Replies: 9
Views: 7187

Re: stackable I2C motor shields/brushed DC servo driver

Stackable like the freetronic RGB modules More specifically, I want them physically stackable, with side-access motor, power, encoder & limit switch connectors. So I can run 3 or 4 decent sized motors from the one physical controller, instead of having a nightmare of fasteners, connectors, enclosur...
by effgee
Sun Nov 11, 2012 9:20 pm
Forum: Product / Device Ideas
Topic: stackable I2C motor shields/brushed DC servo driver
Replies: 9
Views: 7187

Re: stackable I2C motor shields/brushed DC servo driver

There is already some motor shield product on the way, jaycar will have them in fairly soon. Any specs ? Apart from http://www.pololu.com/catalog/product/2502, all the 'me too' motor shields don't suit me because they only drive lame-sized motors, and are 'pin hogs', i.e they use up too much IO so ...
by effgee
Sun Nov 11, 2012 12:39 pm
Forum: Product / Device Ideas
Topic: stackable I2C motor shields/brushed DC servo driver
Replies: 9
Views: 7187

stackable I2C motor shields/brushed DC servo driver

kind of like this one: http://blog.notdot.net/2011/08/Building-a-stackable-motor-driver-shield-for-Arduino but preferably with a higher spec micro and H-bridge. Done right, it could act as a standalone arduino, and simply stack more on to drive more motors. Or if you need more IO or comms, stack the...