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Topic: Your latest purchase (Read 116 times) previous topic - next topic

justjed


A total steer by wire would be pretty scary for me


Well, now now you can find out if it really would.
Quote
Japan's Nissan Motor Co plans to equip some of its luxury cars with a system to control steering electronically, rather than mechanically, the first time so-called "steer-by-wire" technology will be used in mass-produced vehicles.


And, in theory, you could hook an Arduino into that too!  ]:D
... it is poor civic hygiene to install technologies that could someday
facilitate a police state. -- Bruce Schneier

cyberteque

I broke down and bought a lamp/magnifier that has 36 white LED's rather than a weird circular flouro tube.
It seems whiter than my last illuminated magnifier, maybe a tad brighter as well.

Certainly runs cooler than a flouro one!

Beginning to realise I need glasses!

Graynomad

Quote
Beginning to realise I need glasses!

Sad fact of life I'm afraid :(

Try one of the head-mounted magnifiers, they are great, a bit cumbersome but you can really see the small stuff clearly.

______
Rob
Rob Gray aka the GRAYnomad www.robgray.com

liudr


Quote
Japan's Nissan Motor Co plans to equip some of its luxury cars with a system to control steering electronically, rather than mechanically, the first time so-called "steer-by-wire" technology will be used in mass-produced vehicles.

And, in theory, you could hook an Arduino into that too!  ]:D


They may be doing it to cut cost, like replacing tactile buttons with touch screens. By the way, I tested the MPG for my car. On highway if I use cruise control I can get the advertized 38MPG at 75MPH. I was on the other hand trying my best but only got 24MPG on local roads. They promised 27MPG. I was driving like a senior citizen.

I think the CVT is very good at high speed. It shifts to a gear ratio that optimizes engine efficiency. My engine is running at 2,000 RPM or less at 75MPH. You want to always drive with cruise control otherwise if you step on the gas, the RPM goes up and ruins your MPG. But the same CVT is horrible at low speed, especially at stop to go. It easily revs at 2,000 when I was trying to get from 0 to 20MPH and then shifts down to 1,250RPM when I hit 30PMH. Maybe I need a tune-up.

GoForSmoke


Quote
Beginning to realise I need glasses!

Sad fact of life I'm afraid :(

Try one of the head-mounted magnifiers, they are great, a bit cumbersome but you can really see the small stuff clearly.

______
Rob


After getting the same advice from Grumpy Mike last year I went to Harbor Freight and checked theirs out. The one to get is the most expensive, almost $10 before the discount coupon -- I paid $7. It's got a light and has a box with 4 different double-lenses and clips on the visor I expect to hold the lens at 2 distances though you can put 2 lenses in at once (gets heavy) and maybe see germs with.

The lens flips up or down, the visor does too (and occasionally needs tightening), it's always in the right position as you move your head and it leaves both hands free. I was using a magnifier with base but the visor is so much easier to work with I won't go back. It's well worth the money or even 2x-3x what I paid.

This is the item, compare to the next cheaper one if you go there:
http://www.harborfreight.com/head-strap-magnifier-with-work-light-95890.html
I find it harder to express logic in English than in Code.
Sometimes an example says more than many times as many words.

JoeN



Quote
Beginning to realise I need glasses!

Sad fact of life I'm afraid :(

Try one of the head-mounted magnifiers, they are great, a bit cumbersome but you can really see the small stuff clearly.

______
Rob


After getting the same advice from Grumpy Mike last year I went to Harbor Freight and checked theirs out. The one to get is the most expensive, almost $10 before the discount coupon -- I paid $7. It's got a light and has a box with 4 different double-lenses and clips on the visor I expect to hold the lens at 2 distances though you can put 2 lenses in at once (gets heavy) and maybe see germs with.

The lens flips up or down, the visor does too (and occasionally needs tightening), it's always in the right position as you move your head and it leaves both hands free. I was using a magnifier with base but the visor is so much easier to work with I won't go back. It's well worth the money or even 2x-3x what I paid.

This is the item, compare to the next cheaper one if you go there:
http://www.harborfreight.com/head-strap-magnifier-with-work-light-95890.html



Based on comments on another thread I posted about working with surface mount parts, I bought this:

http://www.amazon.com/gp/product/B0015IP380

More expensive than Harbor Freight but hopefully it is worth it.
I have only come here seeking knowledge. Things they would not teach me of in college.

GoForSmoke

If it isn't, try the other as 4 different strength lenses to choose from is really nice.

I find it harder to express logic in English than in Code.
Sometimes an example says more than many times as many words.

JoeN

#397
Nov 16, 2012, 06:04 pm Last Edit: Nov 16, 2012, 10:57 pm by JoeN Reason: 1
Last night Adafruit had 10 Arduino Dues available.  I got mine.  All gone now, sorry.

They just shipped!  WHOOT

Order Confirmation from Adafruit Industries

Thanks for shopping with us today!

The following are the details of your order.
------------------------------------------------------
Products
------------------------------------------------------
1 x Arduino Due - assembled (Due) [ID:1076] = $49.95
------------------------------------------------------
Sub-Total: $49.95
Sales Tax: $0.00
United States Postal Service (0.19lbs) (First-Class Mail incl. $0.75 insurance): $3.87
Total: $53.82
I have only come here seeking knowledge. Things they would not teach me of in college.

GoForSmoke

I got 100 18mm piezos for $10.40.

They work but not so well as the ones I paid more for and they are flimsy, not suited for hard use but okay as vibration/touch sensors.

I haven't tried yet but I'm not sure they'd last as buzzers either, not after how one came apart.

As buttons, I think a diode will serve to debounce (real fast touch read) but maybe need 4 as a bridge to keep pin-safe?

I also got some CR2025 batteries for a remote and note DealExtreme shipped a 5 pack as ordered but with 1 missing. I won't raise hell over it (maybe 25 cents) but it's not a good sign at all.

Still waiting on 3 bare-board MP3 players with SD adapter and 3 breadboard-ready SD adapters.

I find it harder to express logic in English than in Code.
Sometimes an example says more than many times as many words.

GoForSmoke

I got my SD Modules and MP3 players (which were not quite what I thought) and went looking for docs on the SD modules. But there's none posted so I emailed LC China Tech and they say they will datasheets on whatever they make.

I'd like to get opinions of the things they do make, some of the modules psych me up a bit. Like the two that look like they can do USB hosting, and the nice MP3 module and others that should take care of those "Arduino hasn't got the speed" projects.

http://www.lctech-inc.com/Hardware/

I bought the SD modules through DealExtreme, $2.60 each for 3. So far it looks like all it will take to connect to an UNO is 8 female-to-male jumper wires. If I can work them out then just about anyone should be able to use them.  :)

LC tells me they will beat the price on 1 or many without asking what I paid. Also they tell me they take PayPal. However their site looks like it needs help if it's to become hobby-friendly.

Of course soldering up an SD adapter is probably even cheaper.





I find it harder to express logic in English than in Code.
Sometimes an example says more than many times as many words.

Osgeld

eh i dunno in single quantities I spent 2.90 for a socket, 52 cents on a level shifter, + board + time + header
http://arduino.cc/forum/index.php?action=unread;boards=2,3,4,5,67,6,7,8,9,10,11,66,12,13,15,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,86,87,89,1;ALL

GoForSmoke

Hey I -have- the SD modules. They did cost me $2.60 each though shipping on the total $48 order did run almost $2. What are the chances that China subsidizes electronics, like they do solar panels?


I find it harder to express logic in English than in Code.
Sometimes an example says more than many times as many words.

Osgeld

its not a matter of being subsidized, its a matter of bulk

just order 10 of something save 30 cents a unit, now order 100,000 of them ...
http://arduino.cc/forum/index.php?action=unread;boards=2,3,4,5,67,6,7,8,9,10,11,66,12,13,15,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,86,87,89,1;ALL

GoForSmoke

#403
Nov 27, 2012, 10:23 am Last Edit: Nov 27, 2012, 10:30 am by GoForSmoke Reason: 1
And when you make things in 100x previous quantities, it is possible to include tricks that radically cut the cost to make them. I know this for a fact having "been there, done it, wrote the cost estimation and bidding packages" back when I was a production engineer in the 80's.

I say possible because I'm not there. They may be clearing out a lot of items they don't want to continue or just made too many of and want to clear warehouse space. That would also be economical.

Maybe Dealextreme made a mistake and sold these at a loss? Ever find something mis-marked at a big store? Usually luck like that happens when my pockets aren't full, but I've scored before!
Or not a mistake? China LC Tech never asked what *I* paid, just blanket-stated they could beat the cost.

So for me and you where we are is kind of the same boat. But hey man! You want links? Maybe get some yourself?

http://dx.com/s/sd+module.html?range=ShortHeadLine1&category=499&GEPrice=1.00&LEPrice=4.00
I got the 3rd one, it's $3.20 in single but I bought 3. Catch is when you order "bulk" (more than 1) you have almost $2 shipping for the whole order instead of free shipping.
http://dx.com/p/sd-card-module-slot-socket-reader-for-arduino-arm-mcu-133709

http://dx.com/c/electrical-tools-499/diy-parts-components-410
This is the whole DIY selection, note the BT module for $6.60 in single, $5.48 ea at 10.

And I got docs. The only one I couldn't have found is the module schematic showing the LM1117-3.3 between the 5V and 3.3V pins. Other than that, I might need to run at 3.3V or level shift MOSI, MISO, SCK and CS.... I need help to be sure. Man, that could ruin the "quick, clean and easy" part of this nutritious breakfast!

The rest of the docs are generic SD card and SPI specs. I will share if you want.

You do know there's info in the Playground to solder wires to an SD adapter (the kind you often get with micro-SD cards) and run directly from that (must be 3.3V levels). It's not elegant or quick and clean but to a guy with your skills I guess easy is still on the list.  ;)

Edit:
Looking more at the schematic, I see where the signal lines all connect to 3.3V through 10k resistors. I am puzzled, perhaps 5V signal loses kick through the resistors while the same don't allow enough 3.3V through to give logic level ON? For all I know, I'm looking at a level-shifter, I don't know hardware beyond the rank amateur level.
I find it harder to express logic in English than in Code.
Sometimes an example says more than many times as many words.

draythomp

I've bought a number of items from China and yes (almost) they subsidize shipping.  Most of the stuff come with free shipping.
Trying to keep my house under control http://www.desert-home.com/

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