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Topic: Your latest purchase (Read 115 times) previous topic - next topic

liudr

Since everyone is having a retro moment, can I ask where to find reference to the apple 2 code call -151? Also what key combo triggered this? I couldn't find anything. I remember you have to get into the mini debug program to load games onto memory from tape recorders.

BTW, lost my appetite when shopping for 7-segment displays when I saw this one with a photographed spec sheet and half the diagram was clipped off:

Well only clipped on firefox but that's not the entire story.

http://www.ebay.com/itm/0-287segment-Red-clock-LED-display-common-anode-x2-/310391412337?pt=LH_DefaultDomain_0&hash=item4844c51671

I saw a similar display here too with the same spec sheet (pictures are not identical):

http://www.ebay.com/itm/0-56-7-segment-Red-LED-display-common-anode-4pcs-/260984341962?pt=LH_DefaultDomain_0&hash=item3cc3e105ca

And the decimal points don't work.

If you don't care about what you're selling and whether potential buyer will have the wrong spec, why post it there and why bother selling at all?

I'll probably buy from digikey or sparkfun.

cr0sh


Since everyone is having a retro moment, can I ask where to find reference to the apple 2 code call -151? Also what key combo triggered this? I couldn't find anything. I remember you have to get into the mini debug program to load games onto memory from tape recorders.


These might help some:

http://stackoverflow.com/questions/143374/call-151-what-did-it-do-on-the-apple

http://mysite.du.edu/~etuttle/math/apple.htm
I will not respond to Arduino help PM's from random forum users; if you have such a question, start a new topic thread.

GoForSmoke

Liudr, those are kind of small anyway.

http://www.futurlec.com/LEDDisp.shtml

$1.50 for the red .56" 4 digit clock display
http://www.futurlec.com/LED/7FR5643AS.shtml

They have really good prices but the shipping takes a while, it's from Hong Kong.
I find it harder to express logic in English than in Code.
Sometimes an example says more than many times as many words.

Osgeld

you just type in CALL -151


for monitor commands

http://www.easy68k.com/paulrsm/6502/MONREF.HTM

and no you shouldn't have to load cassette programs from the monitor, just dont use DOS and type LOAD (though it may be a different story if you want to load from tape and save on disk, but there are software utilities for that)

liudr


Liudr, those are kind of small anyway.

http://www.futurlec.com/LEDDisp.shtml

$1.50 for the red .56" 4 digit clock display
http://www.futurlec.com/LED/7FR5643AS.shtml

They have really good prices but the shipping takes a while, it's from Hong Kong.



Do the decimal points and colon work? Mine has decimal points but probably no LED inside so they are fake decimal points.

westfw

Adafruit has some 4digit displays now...
There's a lot of room in between a top tier supplier like Avnet and a random and unheard-of eBay dealer, encompassing futurlec, sure electronics, sparkfun, adafruit, and more...

GoForSmoke

I don't have any so I can't say for sure. But Futurlec is not EBay and they've been around at least a few years, even have an address and phone #'s. Oh, and a posted Guarantee:
http://www.futurlec.com/Guarantee.shtml

The main relevant parts as far as I can see:
Quote
Guarantee

All our parts are covered by a 90 day warranty, that the product is free from defects in materials and workmanship. If defects arise during this period, we will at our option, repair or replace the goods purchased or refund your money. Our liability under this warranty is subject to us being satisfied that the material is faulty due to poor materials or workmanship. We will not be responsible for any damage caused by incorrectly connecting or improper use of the material. Furthermore, we will not be liable for any damage to third party or attached equipment to which these products are used.

Terms and Condition of Sale

Unless otherwise explicitly agreed in writing, the conditions as set out below apply to all/each transaction for the sale of goods and materials, design services by Futurlec to a purchaser of Goods and/or Services.


Quote
Goods Warranty

All goods are subject to a 90 day warranty, providing the goods are used within there performance limits, and do not suffer external damage in any way.

For the case of a valid warranty claim, Futurlec can choose either to replace or repair the Goods free of charge or grant credit to or refund to the Purchaser the price of the Goods at Futurlec's sole discretion. Futurlec will have no further liability to the Purchaser under the warranty.

The goods are not suitable for any medical, safety or mission critical applications.


EBay OTOH is more of a dumping ground.

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

winner10920

The only good thing about ebay is if they give you something bad/faulty u threaten to give back feedback (  ]:D )and so far everytime the've promptly sent a replacement piece,
and like that time I ordered 100ir leds and received 100red ones they sent me the ir and I got to keep the red ones

cr0sh


The only good thing about ebay is if they give you something bad/faulty u threaten to give back feedback (  ]:D )and so far everytime the've promptly sent a replacement piece,
and like that time I ordered 100ir leds and received 100red ones they sent me the ir and I got to keep the red ones


I had that happen to me on a couple of SPI interface color LCD displays; I got the displays, but they were supposed to have breakout PCBs. I asked the guy about it, he apologized and sent the PCBs.

The only problem is that I have no way (not that I've tried yet, though) to connect the two; from what I understand, the flex leads on such devices are meant to be heat/pressure bonded to the PCB. I am not absolutely certain whether I can solder the flex lead down or not (like I said, I have yet to try).

Even so, the devices were too inexpensive not to buy... :D
I will not respond to Arduino help PM's from random forum users; if you have such a question, start a new topic thread.

focalist

#174
Apr 03, 2012, 07:06 am Last Edit: Apr 03, 2012, 07:15 am by focalist Reason: 1
I'm the king of lowball ebay parts.. I bottom feed on the stuff that even the most daring ebayers shy away from... and happily, I rarely am disappointed with what I've gotten, particularly when taking into account the prices that can be had by grabbing the stuff nobody else seems to want.

I regularly pick up 1 watt LED's, ten of them for under three dollars shipped (pretty much any standard color inlcuding several whites) for example.  I'm not fool enough to think that the output on these, or their reliability would compare to the specs of a CREE or Philips LumiLED.. but those are also several times the price; and for my purposes, a 50k hour life isn't as important as a lot of light for say 5k hours at the very most in terms of real world use.  I'm a tinkerer, tolerances be damned, it's not like I am going to be nice and drive them within spec anyway ;)

No name ebay sellers often seem to be establishing that "feedback" thing, and personally, I can't help but give an awesome review to the seller that sent me 100 UV LED's, plus 100 resistors to use with them, for two and a half bucks, from halfway across the planet to my doorstep.

Over the years, I've made several hundred purchases off ebay, and I can only say that three of them didn't go perfectly.. and those three were private people selling items, not parts companies selling cheap stock.  Doing business with the far east clearance houses seems to be fairly safe and okay.. as long as you take into account the realities.  First, shipping can take a LONG time, so it's best to use those kinds of places for items to be shelved.. like restocking the resistor bins or bulk small signal transistors.  Second, if you are paying half the market rate for the part, don't be too shocked if there's a quality difference between the ones you get and the top grade.  As long as you are reasonable about what you are buying, those ebay chinese houses and the like can save you a FORTUNE..

Mass produced plastic can be had for a song. I needed a replacement 58mm lens cap.  It took three weeks to arrive... but the price was sixty six cents, shipped.  

When the testing is complete there will be... cake.

NI$HANT

Quote
I ordered 100ir leds and received 100red ones they sent me the ir and I got to keep the red ones


That's a Steal  ;) $)
"Real Men can Accomplish  Anything"
-  Website  
- skype : nishants5  

????? ???? !

winner10920

The prices on those 1w seem to have gone up, some other bidder out there(wonder who)
I used to get 10 for like 2$, even the ocassional lucky 1$, now its more like 3-4

takao21106



Liudr, those are kind of small anyway.

http://www.futurlec.com/LEDDisp.shtml

$1.50 for the red .56" 4 digit clock display
http://www.futurlec.com/LED/7FR5643AS.shtml

They have really good prices but the shipping takes a while, it's from Hong Kong.



Do the decimal points and colon work? Mine has decimal points but probably no LED inside so they are fake decimal points.


Their displays are made by Flying Ningbo, a high quality datasheet is available.
I also have PIC related web domain.

focalist

#178
Apr 03, 2012, 09:04 pm Last Edit: Apr 04, 2012, 04:16 pm by focalist Reason: 1

The prices on those 1w seem to have gone up, some other bidder out there(wonder who)
I used to get 10 for like 2$, even the ocassional lucky 1$, now its more like 3-4


Hehehe sorry.  I'm fairly kitted out on them for the moment, but I need to pick up one more pack of greens.  Been amassing them for an unholy attempt at something, even if everything goes kablooie, I'll only be out twenty bucks in LED's or so... but I've only bought like three of the ten piece lots over the past couple of weeks.. so there must be someone else.  Let's hunt them down like rats.  I got plenty cheap last fall, I think I paid around the two dollar mark for the ten piece lots, pretty much the same price give or take a few cents between the red,green,blue and white.

The centerpiece of the project was gotten today.. as far as watts per dollar, this wasn't too bad:



a FIFTY watt LED, Warm White.. $18 shipped.  3500 Lumens of 3000K light, 16-18v @ 2.5-3A.  Going to need a big heatsink, I'm betting.  

By the way, I ran out of the real thing recently, and have found that using good old white lithium grease (very thin layer) is a reasonable alternative to actual heatsink compound.  After doing a bit of reading (including some guy who tested various products, including toothpaste for a chuckle), it would seem that although it's not quite as good as the high performance compounds, as long as the grease remains to act as thermal bridge, for most usage the regular cheap lithium grease might suffice.  A six ounce tube of lithium grease is like five dollars at Home Depot.  Compound is like seven dollars for a half-ounce tube, and I have to drive a half hour to Radio Shack to get it.  Thoughts?
When the testing is complete there will be... cake.

cyclegadget


About Lithium grease from wik using search of Lithium:

Quote
Like the other alkali metals, lithium has a single valence electron that is easily given up to form a cation.[2] Because of this, it is a good conductor of heat and electricity


http://en.wikipedia.org/wiki/Lithium

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