Very Very Small Flasher Curcuit 1

[dino40]

Good Day Everyone,
Once again I need Your suggestions I have been tasked with coming up with a solution and I would like to ask for your input. I need to make a Flasher Curcuit for a safety device the parameters are as follows:
1. Self contained 2. Flash about 4 times a second. 3. About the size of a stack of four nickels 4. Disposable.
I have the LEDs and battery but I need the switching portion any Suggestions? Thanks for your time Dino40

 

[MikeHalloran]

Yes, I understand the recent Full Employment For Programmers initiatives. I, too, wish you were joking; that fully proven and fully abysmal software has started showing up in consumer products.

You could buy the PICs pre- programmed from a tiny company ... that you could start in your garage.



Mike Halloran
Pembroke Pines, FL, USA

 

[IRstuff]

Sure, you joke now. Just try to get one of those small, lean companies to make a software change a year from now. We've been going through that hell with one of our own divisions for years now.

No documentation, no recollection of what anyone did to make the software work, no idea what a given revision of software does, no idea what the new rev(s) is(were) supposed to fix, no configuration control, no repeatability in their software builds, no guarantee that a particular build even matches what little documentation they have.

That's the "cheaper" small company. Every part shipped is custom, even if it's standard production, because they have no idea what their hardware or software is supposed to be doing in their "standard" product.

TTFN

 

[MikeHalloran]

We are talking about an application that takes less than a full page of assembly code. Two pages if it's fairly well documented.

Mike Halloran
Pembroke Pines, FL, USA

 

[cbarn24050]

About 10 lines of code in all, so trivial it doesn't matter if you forget how it works, only takes you half an hour to write a new one fron scratch.

 

[VEBill]

I just remembered that the local Dollar Stores also sell flashing LED toys with multiple LEDs of various colours, multiple flashing modes controlled with a push button, including batteries, shipped all the way from China.

Retail for Cdn$1.00 or less.

(= about US$.85).

I believe that they use the bare chip epoxied to the circuit card approach.

 

[itsmoked]

For your information VE1Bll that's called COB technology. Chip On Board. If you can the IC of interest in chip form and a Die Bonder you can go pretty cheap that way.

Keith Cress
Flamin Systems, Inc.- <

http://www.flaminsystems.com>

 

[BrianR]

You can buy flashing LEDs where it's all in the LED. They are readily available and the ones I have seen flash at about 3Hz