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Gordon
Joined: 05 Apr 2005
Posts: 1534
Location: Santa Ynez, CA USA
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| Posted: May 7, 2008, 7:29 am Post subject: |
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mornachew wrote: ...Whats the difference between TO220 and TO262? Appologies about my mislead. I had been looking at that 651-8787 part on another page and seeing it in a smaller image, so I missed the fact that about 75% of the bolt-to-heatsink tab is cut off the TO-220AB package to make it a TO-262! Quote: Will it be ok? It should be fine. The IRF2804 is way over rated for this task. More thermal margin would be available with the full heat-sink tab on the case, but I don't know that it will be essential.
You should re-visit (by searching for IRC2804) the page where all the stocked IRC2804 variants are displayed. There, you will be able to d/l a pdf copy of the IRC28084 Data Sheet. Read through it. You will see three alternate packages defined. In the Lead Assignments tables, pay particular attention to the fact that the heat-sink tab is electrically the same as the part's middle pin / lead (IOW, don't allow that tab to contact any metal parts in Roomba). |
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mornachew
Joined: 05 May 2008
Posts: 18
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| Posted: May 8, 2008, 2:30 am Post subject: |
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WOW thats gobbledy gook to me :)
So what i will do is buy , this -http://uk.rs-online.com/web/search/searchBrowseAction.html?method=searchProducts&searchTerm=RFP50N06+&x=25&y=9#header
It is one of your original for that you said you prefered
Away on holiday for a couple of weeks now (nobody to hoover whilst i am awat though!!) So i will let you all know if it works when i get back and have time to fix it. |
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mornachew
Joined: 05 May 2008
Posts: 18
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| Posted: May 28, 2008, 12:20 pm Post subject: |
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well guys after all this my bot is workin!! :)
The problem was brushes not turning not - no suction!!
After Gordons advice and guidance i inserted a n-channel mosfet (rfp50n06) above the U11 component in the 3 empty holes :) - read his thread about it!!
AND NOW SHE WORKS - SWEET AS A NUT ;)
Big thankyou to gordon and all the others on here that helped!
Ive just treated myself to a remote control for her now so i can schedual her to clean at set times this goes well with mycharging dock
if anybody knows any good links so i can get the most out of this little red bot i would be verygratefull !!!!!!!!!
Cheers all |
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G3LHQ
Joined: 24 Apr 2008
Posts: 51
Location: England (can I still use that word)
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| Posted: May 28, 2008, 5:35 pm Post subject: |
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I really enjoyed reading all this, fantastic communication and a happy ending great (A real fairy story)
Well done guys |
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wsngmartin
Joined: 23 Oct 2007
Posts: 764
Location: riverside, california
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| Posted: May 28, 2008, 9:45 pm Post subject: |
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mornachew
congrats. it's way over my head but...wow.....
good job :D |
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mornachew
Joined: 05 May 2008
Posts: 18
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| Posted: June 2, 2008, 1:03 am Post subject: |
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| Ah well that didnt last too long -- she is broke again!!! same fault - brushes wont turn :( |
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mornachew
Joined: 05 May 2008
Posts: 18
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| Posted: June 2, 2008, 1:03 am Post subject: |
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| Ah well that didnt last too long -- she is broke again!!! same fault - brushes wont turn :( |
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mornachew
Joined: 05 May 2008
Posts: 18
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| Posted: June 2, 2008, 1:03 am Post subject: |
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| Ah well that didnt last too long -- she is broke again!!! same fault - brushes wont turn :( |
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mornachew
Joined: 05 May 2008
Posts: 18
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| Posted: June 2, 2008, 1:04 am Post subject: |
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| Ah well that didnt last too long -- she is broke again!!! same fault - brushes wont turn :( |
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mornachew
Joined: 05 May 2008
Posts: 18
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| Posted: June 2, 2008, 1:04 am Post subject: |
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| Ah well that didnt last too long -- she is broke again!!! same fault - brushes wont turn :( |
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G3LHQ
Joined: 24 Apr 2008
Posts: 51
Location: England (can I still use that word)
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| Posted: June 2, 2008, 8:25 am Post subject: |
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oh dear mornachew
Go back to the beginning of this thread, do not pass go & do not collect
£200.00 |
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| Red Roomba no suction - Click Here to visit the Active Version of this page |
