Search found 1189 matches

by whereswally606
Apr 17, 2018 4:17 am
Forum: E-Bike General Discussion
Topic: The ebike parts designing thread with CAD/CAM
Replies: 117
Views: 4741

Re: The ebike parts designing thread with CAD/CAM

somebody asked me for this via pm, so I thought id upload it for all and share it in a semi relevant thread it is an enclosure for the bst900 dcdc to get better airflow on the mosfet and to keep fingers and loose wires out a bit. https://www.thingiverse.com/thing:2865841 sorry if this is in the wron...
by whereswally606
Apr 16, 2018 4:11 pm
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 119
Views: 4592

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

Tonights progress IMG_20180416_215918_800x449.jpg So I didn't do any in the brain boards tonight. I was up at 6am and I didn't feel awake enough to solder the fine pitch stuff. So tomorrow I should have something to test with. bas before I power up this bad boy are the 4r7 resistors in r18-r23 corre...
by whereswally606
Apr 16, 2018 2:08 pm
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 119
Views: 4592

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

coleasterling wrote:
Apr 16, 2018 12:03 pm
If you come up with a heatsink design I'll gladly machine it and send them out to the other beta guys.
That's a very cool offer. I'll look into it.
by whereswally606
Apr 16, 2018 4:46 am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 119
Views: 4592

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

Digikey parts arrived. so should be able to finish my power board and update the other 3 kits from the group buy. I bought 6 more assemblies worth to make up the shipping so It was free and will sort those and sell them with the spare boards I bought, that way in the long run it wont matter about th...
by whereswally606
Apr 14, 2018 8:05 am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 119
Views: 4592

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

I twisted some 1mm copper ground cable to a coil and soldered it to resemble your beefing up of the power traces.

Also I've left a decent gap from the board to the bottom of the heatsink.

Just got to wait for parts now
by whereswally606
Apr 13, 2018 1:28 pm
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 119
Views: 4592

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

IMG_20180413_192550_800x410.jpg
This is as far as I could get today. Hopefully Monday I'll have more parts and can finish it.
by whereswally606
Apr 13, 2018 11:16 am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 119
Views: 4592

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

Make sure you get the correct gate resistors for the Fet you are using? Which are the correct resistors for the 4468 fet, Nobody is using anything else? Ive just put in a digikey order with the components in the picture before. Am I missing something? This just added £40. I feel like I'm gaining no...
by whereswally606
Apr 13, 2018 7:33 am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 119
Views: 4592

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

There is an issue with the Zip on the first page. It contains a file called component list, it is missing some of the cheaper more generic components on the board here are the missing parts. Power_PCB missing from original component list.ods components missing.png I only realised when attempting to ...
by whereswally606
Apr 13, 2018 4:19 am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 119
Views: 4592

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

progress from yesterday don't do it like this. using scrap extrusion from a upvc window IMG_20180412_202702web.jpg here is were my screws went in (white arrow) to be attached from the outside IMG_20180412_202710web.jpg A lot of tedious filing and grinding went into this and it is useless. after all ...
by whereswally606
Apr 08, 2018 4:30 pm
Forum: Items for Sale - New
Topic: Group buy for lebowski powerpcb components
Replies: 12
Views: 414

Re: Group buy for lebowski powerpcb components

Wife and I were busy tonight sorting components into boxes. That said, it is possible if Emmgee, ColeAstering and Minimum want their power boards and components ahead of the brain board then they are ready waiting to be posted. That way you guys can have fun building whilst i do the same and try my ...
by whereswally606
Apr 06, 2018 9:52 am
Forum: Battery Technology
Topic: Help me reinforce this DC to DC step up.
Replies: 8
Views: 325

Re: Help me reinforce this DC to DC step up.

I had the bst900 and so I built (designed and plastic printed) a box to help the fan pull air over the heat sink better, that did 15a pretty easy. but didn't have to do that for long on my lifepo4 as the batteries draw tapered away pretty quickly as they fill up. What about putting high speed fans a...
by whereswally606
Apr 04, 2018 7:23 am
Forum: Items for Sale - New
Topic: Group buy for lebowski powerpcb components
Replies: 12
Views: 414

Re: Group buy for lebowski powerpcb components

Parcel arrived from pcbway 10 powerboards, so 7 left in stock.
by whereswally606
Apr 03, 2018 4:21 am
Forum: Items for Sale - New
Topic: Group buy for lebowski powerpcb components
Replies: 12
Views: 414

Re: Group buy for lebowski powerpcb components

Parcel arrived from Digikey. This means (since Bas sent me one of his boards) that I should be able to build my powerboard up and document the process. Film and word. Repair the brain boards which have zeners which should be shottky diodes. Still waiting on the customer power boards but the progress...
by whereswally606
Apr 03, 2018 1:40 am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 119
Views: 4592

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

Is this the next gen chip or the same but perf board variant of bobc brain?
by whereswally606
Mar 29, 2018 4:17 am
Forum: Items for Sale - New
Topic: Group buy for lebowski powerpcb components
Replies: 12
Views: 414

Re: Group buy for lebowski powerpcb components

Order Placed...

had all my questioned answered by Lebowski so will send out kits once all parts arrive (this includes PCB and brain boards)
by whereswally606
Mar 28, 2018 4:55 am
Forum: Items for Sale - New
Topic: Group buy for lebowski powerpcb components
Replies: 12
Views: 414

Re: Group buy for lebowski powerpcb components

groupbuy3.png groupbuy3web.png Cole, no worries it is moving fast. I've scaled down some of these spreadsheet images as no one seems to down load the attachments (maybe it doesnt register, idk?) This is the latest dialed in. Just need confirmation on the sensors from Bas. If anyone else wants in on...
by whereswally606
Mar 28, 2018 4:22 am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 119
Views: 4592

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

LLC ACS770ECB-200B-PFF-T (620-1538-5-ND) instead of LLC ACS770KCB-150B-PFF-T (620-1540-5-ND) Bas should we upgrade to this sensor since we look to all be opting for the 4468 fets and this gives us a bit of head room. Please check my comparison i think this is the direct equivalent upgrade, i dont wa...
by whereswally606
Mar 27, 2018 9:20 am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 119
Views: 4592

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

PCBs on their way to me from pcbway via epacket. just received the email now.
by whereswally606
Mar 26, 2018 12:06 pm
Forum: Items for Sale - New
Topic: Group buy for lebowski powerpcb components
Replies: 12
Views: 414

Re: Group buy for lebowski powerpcb components

new updated costs Whereswally606 £64.32 Minimum £73.88 Emmgee £73.88 Cole £63.49 If you were wondering why my costs were less I have some irs2186 chips left over from the previous Lebowski board projects. Cole your costs just up marginally as 6 is below the price break of 10 for your mosfets. Let me...
by whereswally606
Mar 26, 2018 11:40 am
Forum: Items for Sale - New
Topic: Group buy for lebowski powerpcb components
Replies: 12
Views: 414

Re: Group buy for lebowski powerpcb components

This is fine Emmgee, that is why I did the Spreadsheet so I can quickly add and remove stuff and fire it back at the bom upload tool on digikey. I suspect you are right about the price.
by whereswally606
Mar 26, 2018 7:33 am
Forum: Items for Sale - New
Topic: Group buy for lebowski powerpcb components
Replies: 12
Views: 414

Group buy for lebowski powerpcb components

groupbuy.png Minimum, ColeAsterling and Emmgee can you have a look at this png of a spreadsheet that I worked out for the group buy. If there are parts you want extra or ones you don't then let me know. Minimum £73.44 - I put in your extra 4468 fets but didn't know whether you want the other mosfet...
by whereswally606
Mar 23, 2018 8:34 am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 119
Views: 4592

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

I have ordered 10 power pcbs to be combined with kits to build the complete power board which are to be sent out with a working tested brain board. I used china post since ive never had customs charges with them but always with dhl and I don't really know about the other couriers. Anyway. My paypal ...