speling & grammer
"… you wouldn’t believe I did that on purpose would you? …"
NOW I would!
A few Electronics Distributors and Manufacturers
Distributors usually have large catalogs of many different parts, passives to ICs to connectors to whatever. Some send free, others want to charge a bit to be taken off your first order, some have minimum order dollar amounts.
Mouser http://www.mouser.com/ local guys to me, no minimum, links to datasheets online
Digikey http://www.digikey.com/ been pretty standard, no minimum, links to datasheets online
Allied http://www.alliedelec.com/ also local, can be high
Jameco http://www.jameco.com/ almost tends to hobbiest
Newark http://www.newark.com/
Manufacturers - sometimes data catalogs, product offering “brochures” (in a 3 ring binder)
National Semiconductor http:/www.national.com/ variety micros, analog, power, FETs
International Rectifier http://www.irf.com/ FETs, FET drivers, FETS, power semiconductors… and FETs
Intersil http://www.intersil.com/ HIP4081 many others
Infineon http://www.infineon.com/ monolithic h-bridges
Motorola http://www.motorola.com/ micros, and some power even
Actually, I haven’t made any decisions yet…
I’ll tell you what, BOA…
I think in the end, I will probably go with your hybrid design (just substituting some higher amperage FET’s -it sure has gotten a lot of praise…That being said, and the path I have chosen, I am stoked to try to learn how the whole system works (in a full H-bridge form) and how each part does it’s thing and I expect a few meltdowns allong the way. If nothing else, there has been at least a few suggestions of additions to your design that I want to look into. I dunno, if I just copy a schematic and solder it up it’s really nothing more than following a recipe.
…Ah, I must learn first, young grasshoppah…
Extremely rough and sparse
Extremely rough and sparse stub - but its a start
https://www.robotshop.com/letsmakerobots/node/2484
Rik - how do you make it editable by all ?
BTW BOA - I know I botched up your diagram - it will take me a while to get it close …
Modified BOAs Brillant H-bridge added
Hope I did that right, added a modded version of the BOAs relay h-bridge with drivers and flyback diodes.
it just is (editable)
(not edible)
because it is a component type page
but you figured, I figure
it just is not (editable)
Only just now did I find out that you did not start a component page, but a walkthrough page. Those are editable by the original poster only.
Apparently.
Go figure…
Ok, Am I going nuts? I
Ok,
Am I going nuts? I “thought” I started a Component page.
Was the type changed by someone?
As a component (i think) page, robologist DID modify the node, as he stated in his previous comment. I’m suspicious of what happened … I don’t think a “mere mortal” can change a node type. hmmmm.
For safe keeping, I have the original, and all mods on my wiki (here). A wiki is really nice for developing/evolving a comprehensive document. Since everyone can edit it, but it keeps all revisions and allows minute inspection of differences, divergent and hetergeneous information sources cam be melded together into a better doc.
I was thinking that you
I was thinking that you could post an how to on your lets-make-robots-with-big-motors controller for the beginners like me.
Open / Closed
When you say “burn open” you mean “burn closed” don’t you? As in the switch closes, causing your bot to go flat out?
Left, right?Yes, I meant to
Left, right?
Yes, I meant to say it will fry in a position that will be open throttle… (admittedly, not the best choice of words)
but most definately fried closed…Hi silva_p, what part is
Hi silva_p, what part is confusing? Maybe I can write up this one a little better so the confusing parts are resolved.