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271  Using Arduino / Microcontrollers / Re: Standalone Arduino on 6 AA: voltage drop from diode, ideas to circumvent? on: February 26, 2013, 05:37:03 am
I have selected this mosfet for power protection:

http://nl.farnell.com/fairchild-semiconductor/rfd14n05l/mosfet-n-logic-i-pak/dp/1017789

Hardly any resistance, can go up to 14 Amps, switches at about 2 - 3 V, so even with 3.3 V you can switch it open. If any of you see any reason not to pick this one I'm much obliged to hear. I still have a fair share of these so if they are good enough, I'll use them.

That's an N-Channel by the look of it. You need a P-Channel.

I use MIC39100 VR. 1A rated and 410mV drop out.
272  Community / Products and Services / Re: Where to advertise my android bluetooth interface software? on: February 26, 2013, 04:24:52 am
I've just installed the beta on my phone. I'll have a play with it and provide feedback.

1) if you configure the screen and commands from the uC then do you have to do this every time? I.e settings lost and each connected device configures the connected BTInterface screens?

2) Is any particular version of Android required? I'd like to install in a cheap phone with PAYG SIM to provide mobile remote interface with the SMD ability.

It looks promisimg with some feedback to mature. :-)

Thanks
273  Community / Products and Services / Re: Get big discounts off Basic4android write Android apps to interface Arduino on: February 25, 2013, 09:07:40 pm
If you have input another companies Vat number in order to attempt to pay exclusive of Vat then you are commiting Vat fraud!
274  Community / Products and Services / Re: Cheap Fusion PCB Service(Color Free) !! on: February 24, 2013, 05:04:51 pm
There is an option to leave comments at checkout. I'm sure you could leave a note to ask them to ship as not requiring signature, due to it being difficult for you due to working hours.

I like the signature touch as it shows they are serious about making sure your items reach you. If there is no signature then there is also no proof where an item may have gone missing in the delivery chain.

Anyway, I've now built the first board and tested it as working well. There are a couple of minor errors on my part, but nothing serious enough to prevent use.

Here's a couple of photo's below. I've also just submitted another 2 orders and will be following with some more in the next day or two. So far I can't recommend them highly enough. They tick all the boxes; Price, Options, Quality, Service, Delivery.
275  Community / Products and Services / Re: Cheap Fusion PCB Service(Color Free) !! on: February 13, 2013, 03:40:26 pm
Boards from Elecrow just collected from the Post Office. They were sent as signature required, which is another nice touch on top of the emailed photo's and tracking.

I've only had a chance to look at one quickly but the quality looks very good.

I need to get some components soldered in the next few days and test these properly to make sure I've made no mistakes. I'll then report back.

Order placed 29th January. Order received in UK 13th February. Two weeks from order to delivery. :-)
276  Using Arduino / Installation & Troubleshooting / Re: Nick Gammon's bootloader nearly working on: February 11, 2013, 04:24:00 pm
Yes, factory default is 8Mhz internal osc and Clock Div 8 to give 1Mhz.
277  Using Arduino / General Electronics / Re: Chinese Pcb Manufacturer Reccomendation. on: February 11, 2013, 03:01:57 pm
After seeing this I thought I'd email Sitopway for a quote.

Just received it and they quoted me 50USD for 10pcs 100mm x 100mm dual layer, red soldermask, top/bottom silkscreen on 16mm FR4.

That's 20USD more than Elecrow, so looks like I'll be sticking with them.

The OP said 5.2GBP for 130mm x 140mm, so I wonder if that was just per single PCB, ie 10 pcs was 52GBP? That would make more sense at about 80-90USD for 10 pcs 130mm x 140mm, based on what they have quoted me.
278  Using Arduino / Microcontrollers / Re: Unable to locate library files on: February 11, 2013, 11:05:37 am
If you're struggling to locate a particular library used in a specific project then it may be more productive to contact the author of that project for support.

Hopefully they can tell you where to get the library. It may be one of their own for that particular sketch.
279  Using Arduino / LEDs and Multiplexing / Re: Arduino and a laser on: February 11, 2013, 08:30:23 am
Use an Arduino with SD card and SimpleSDAudio library, a laser, a photodiode, amplifier and speakers.

Send the PWM output from SimpleSDAudio to the laser. Connect the photodiode to the amplifier and use the laser to transmit wireless audio across to the amplifier and speakers.

Tuttut mentioned this as an idea in his SimpleSDAudio library thread in the Audio forum and it sounds quite cool.
280  Using Arduino / Microcontrollers / Re: Supplying power to a standalone ATMega328P-PU on: February 11, 2013, 08:09:34 am
I'm saying you should connect both pairs of pins. Vcc/Avcc and both Gnds.
281  Using Arduino / Microcontrollers / Re: Supplying power to a standalone ATMega328P-PU on: February 11, 2013, 06:22:26 am
The data sheet specs for total current sourcing ability is based on per set of pins, so you should connect BOTH grounds, otherwise you only have a ground with half the current carrying capacity of your Vcc pins.
282  Using Arduino / Displays / Re: Powerbox Arduino on: February 11, 2013, 02:33:10 am
Temperature, volts, amps, of what? You're not doing very well at describing your intended project.

Take some time and explain exactly what you are trying to do, in detail.
283  Using Arduino / Microcontrollers / Re: Supplying power to a standalone ATMega328P-PU on: February 11, 2013, 02:29:17 am
I think he means does he have to connect both Vcc/Gnd pairs, rather than can he connect a Vcc but not the Gnd.
284  Using Arduino / Programming Questions / Re: ps2 barcode scanner using instantly on: February 11, 2013, 02:23:34 am
So check it that way then. What's the problem exactly? It looks to me like you've just posted the solution to your own original question.
285  Using Arduino / Programming Questions / Re: For Cycle - Never Execute - Is Possible ? on: February 11, 2013, 02:14:28 am
Only a quick look on my phone as I wake up....but, you look as if you should be calling your readArray function.

You use readArray when it should be readArray()

Setting your values is a very long winded way about it too. You should be able to do that all on a single declaration. I'm sure someone else will be along shortly to check over more thoroughly than I can at present.
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