Newbie Advice Needed Please

[Frankenstein12]

Hi All

I appear to have previously registered so may have asked this elsewhere before.

I am trying to find a cost effective way of getting a circuit designed. I bought some odds and sods such as one of those practice circuit boards and some resistors and LED's and managed to make a half working prototype BUT it kept overheating the battery.

Basics of what I am trying to put together is.

A PCB board with an on off switch. An AA or 9v battery terminal and two rows of 4 high power LED's with 1 set of 4 being on an alternating on off switch with a 3 second timer ie on for 3 seconds off for 3 seconds.

Any idea where I would go to get a pcb board designed and maybe even made for a price that won't require me to sell my kidneys or Rob a bank?

Any advice much appreciated

Thank you.

 

[davenn]

l and two rows of 4 high power LED's

hi ya

give a link to the LEDs so we know what V and A they need to operate

 

[Harald Kapp]

Without knowing the specs (as requested by @davenn ) "High power LED" and 9 V battery sounds incompatible.
A typical 9 V battery has a capacity of ~600 mAh.
A high power LED (mind: what I consider high power) is operated at 500 mA or more.
A 9 V battery will live for approx. 1 hour under these conditions.
Detailed calculation requires more input data.

As for the production of the pcb: the layout is easily constructed using e.g. KiCad or Eagle or any other pcb layout software. Themanufacturing can be done by any of the pcb services you find on the internet. Be it cheap from China (but incurring possibly long waiting times) or a manufacturer in europe (enter "pcb prototype manufacturer europe" into your favorite search engine).

 

[bertus]

Hello,

The mentioned capacity of 600 mAh for the 9 Volts battery may even be to optimistic.
The capacity depends on the chemistry of the battery and whether it is a primairy or rechargeble battery:



https://en.wikipedia.org/wiki/List_of_battery_sizes

Bertus

 

[hevans1944]

Hmmm. Yet another drive-by poster who is only looking for a "quick answer" and is unwilling to enter into a discussion. If I were writing the software for these forums, I would automagically suspend any account that asks a question and then provides no further interaction. Comments created by suspended accounts would not be accepted or displayed until the account owner requested that their account be re-activated.

That might not stop drive-by posting, but it would tend to eliminate responses (like this one) to dead threads,