Thread
1/2 AA 3.6volt (less than) $1 buck ea. - /w catch.
http://www.ebay.com/itm/181046077641?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
It comes with circuit board, high power led, momentary switch,
He cut me a deal I bought 120 for $110 including shipping, Still has 2900 in stock.
He wouldn't tell me where they are from, but they are no longer needed (brand new stock) for a project that never materialized i guess.
I basically bought them just for the battery for my vintage macs.
what do you guys think this came from?
It comes with circuit board, high power led, momentary switch,
He cut me a deal I bought 120 for $110 including shipping, Still has 2900 in stock.
He wouldn't tell me where they are from, but they are no longer needed (brand new stock) for a project that never materialized i guess.
I basically bought them just for the battery for my vintage macs.
what do you guys think this came from?
Good score...
Does shorting those brass tags also turn on the LED? The IC looks like it could be a 555 timer or similar? Some sort of alarm signal with flash or timed on or off delay?
The circuit shouldn't be too hard to figure out by looking at the IC datasheet and following the connections.
Does shorting those brass tags also turn on the LED? The IC looks like it could be a 555 timer or similar? Some sort of alarm signal with flash or timed on or off delay?
The circuit shouldn't be too hard to figure out by looking at the IC datasheet and following the connections.
I think you are correct, because it will flash.
Is the battery soldered on?
Are yours still reading a full 3.6V?
he said they are " tacked on " he said with some nippers the metal tabs peel right off.
he said they are brand new, will all be at full rated capacity.
Feel free to ask him question directly if interested, he is a great guy ... great communication!
I'll get my 120 unit order on monday.
I always wondered what would happen if you would put a 3v lithium battery in a mac. They are a tiny bit larger, but should fit. 6 pieces for 2 Euros, for cameras i believe.
A 3V battery is unlikely to be sufficient.
It would be nice if those LEDs are continuous duty and not just for an intermittent flash duty cycle.
Two birds with one Susan B. }
Two birds with one Susan B. }
From what he said, pressing the red button once makes it flash. pressing it twice keeps it on.
Do you have a project that calls for bright white led's?
If so this is the buy-it-now for you.
ok got these in today,
they are for ship's emergency life vests, the brass leads are to detect water.
kinda cool
they are for ship's emergency life vests, the brass leads are to detect water.
kinda cool
A 3V battery is not sufficient. I've tried it before.
How bright are the LEDs? I'd like to test one for continuous duty cycle survival! }
:lol:
They are very bright!
hey there is a 16v 10uf tantalum cap on there
For one, I'm going de-solder the LED, and solder on a buzzer, toss it in the low spot under my house, that way if it floods in it will buzz and let me know
Yay! My guess was close.
Keep another one with the LED so that if it REALLY floods you can signal a passing helicopter for rescue :beige:
Rick
Keep another one with the LED so that if it REALLY floods you can signal a passing helicopter for rescue :beige:
Rick
:lol: :lol: :lol:
Use the LED to summon Batman. "Leaping lollipops Batman, uniserver is in trouble."
heck yeah lol
they will work as water detectors
so 10 were dead, 15 were less then 3.5v
So I called the guy on the phone and had a conversation with him.
He is going to refund 20 bucks.
I guess that is better then nothing, they were not packed all that well and some of them were touching,
he is lucky it didn't catch fire and burn down a USPS truck lol
lolthey will work as water detectors
so 10 were dead, 15 were less then 3.5v
So I called the guy on the phone and had a conversation with him.
He is going to refund 20 bucks.
I guess that is better then nothing, they were not packed all that well and some of them were touching,
he is lucky it didn't catch fire and burn down a USPS truck lol
Looks like you scored a bunch of handy little project boxes with them as well. Then you screwed him for a discount } . Hope he is still a nice guy.
. Hope he is still a nice guy.
It looks like the LEDs stay on continuously in that pic. Is that the case or were they flashing and you caught a few on during exposure?
They where flashing.
By shorting one of the water sensing leads to the leg of the LED, it will say on continuos.
However the the battery strains to keep up with the energy consumption of the LED, The circuit was energy optimized
with this high-output LED to be flashing. The LED acutely kicks on using power right from the 16v 10uf tantalum cap.
Removed and Wired one of the LED's up to my 6v with a pot, and man this thing has some serious light output.
By shorting one of the water sensing leads to the leg of the LED, it will say on continuos.
However the the battery strains to keep up with the energy consumption of the LED, The circuit was energy optimized
with this high-output LED to be flashing. The LED acutely kicks on using power right from the 16v 10uf tantalum cap.
Removed and Wired one of the LED's up to my 6v with a pot, and man this thing has some serious light output.
How many would be required to make a bedside reading lamp?
Long ago in a universe far, far away, I popped a pair of AAs into a Performa 475 I had. Worked flawlessly for me, the machine held time and turned on without employing the PizzaBox PowerToggle. I don't know if I'd recommend it as a long-term solution, but I also don't know if I'd go buy more than a hundred batteries which require physical modification before they can be installed in a Mac.
If a battery reads 3V with no draw (volt meters don't use much for the load to calculate voltage) then it might dip lower when in actual use. Once batteries start dropping in measured voltage from design voltage they are pretty much junk.
Are you planning on reselling them or do you have 100 old macs with dead batteries? I have 10 or so new PRAM batteries in stock so I am good for a few years.
You can get 5 new ones for a little over $2 a piece shipped on ebay, less damage to the hobby budget.
Are you planning on reselling them or do you have 100 old macs with dead batteries? I have 10 or so new PRAM batteries in stock so I am good for a few years.
You can get 5 new ones for a little over $2 a piece shipped on ebay, less damage to the hobby budget.
Just fwiw - that SOIC-8 isn't a small 555.
Don't try and use it as a 555.
It's a driver IC for the LED, most likely. Similar circuitry exists in all my multimode high power LEDs.
... Besides, for simply flashing an LED, you don't need a 555. One cap and a transistor is pretty much all you need.
Don't try and use it as a 555.
It's a driver IC for the LED, most likely. Similar circuitry exists in all my multimode high power LEDs.
... Besides, for simply flashing an LED, you don't need a 555. One cap and a transistor is pretty much all you need.
*shrugs* I ran a 3V camera battery in an LCII for years, it was a bit bigger than the normal PRAM batteries, but I never had any issues with it.