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76  Using Arduino / General Electronics / Re: first pcb try on: January 23, 2013, 10:04:00 am
Well many thanks for all tips and help.
I dont know why pcb shows without pin 8 connected, since it's connected to gorund in the diagram view :o (maybe fritzing sucks)
I will try to do it single side only and will post diagram and pcb here so you can review it

@pwillard yes i'll use laser printer toner transfer method if i need some help i'll get in touch with you. thanks
77  Using Arduino / General Electronics / first pcb try on: January 21, 2013, 06:53:47 pm
Hi, i spend some minutes trying to do my first pcb, basically it's an arduino with a 3.3v regulator so i can connect a nrf24l01 chip.
If it's alright i will buy some ferric chlorid so i can make my first pcb.

Please give any hints, opinion, advice...
78  Using Arduino / General Electronics / Re: 3v regulator needed on: January 05, 2013, 01:17:31 pm
Is it this one http://pdf1.alldatasheet.com/datasheet-pdf/view/111555/ROHM/BA033T.html ?
thanks
79  Using Arduino / General Electronics / 3v regulator needed on: January 05, 2013, 01:03:59 pm
hi, i've made an arduino stripboard and need to connect a nrf24l01 that needs a maximum of 3.6v.
What's the best/cheapest regulator i can use to go from 5v to 3.3v or approximately ?

thanks
80  Using Arduino / Microcontrollers / Re: CP2102 and breadboard arduino on: February 10, 2012, 01:52:48 pm
Actually i have one more question...
how could i implement a switch (manually or automatic ) so i could chose whether to use power from usb or external battery?
81  Using Arduino / Microcontrollers / Re: CP2102 and breadboard arduino on: February 09, 2012, 04:30:32 pm
Thank you very much smiley
82  Using Arduino / Microcontrollers / CP2102 and breadboard arduino on: February 09, 2012, 04:00:25 pm
I recently bought an USB to Serial adapter so i can send my sketches to atmega328, and has DTR pin available... so i dont need to manually reset the atmega chip


this is the pin layout


what i would like to know is:
if i have a breadboard arduino that is receiving power via external source that goes through the 7085 voltage regulator ... like this:


in order to use the adapter to send sketches to atmega328 do i still have to connect the +5v of the adapter to atmega's VCC ?! Or that would be only if i wanted to power the arduino via USB ?

Thanks
83  Using Arduino / Project Guidance / Re: Simulate push button with arduino on: February 06, 2012, 04:13:44 pm
Got the power button working smiley controlled by arduino.
Now i just have to test the mode button
84  Using Arduino / Project Guidance / Re: Simulate push button with arduino on: February 02, 2012, 09:22:43 am
Can i use a 2N2222 for the (*) connection ?
85  Using Arduino / Project Guidance / Re: Simulate push button with arduino on: February 01, 2012, 02:05:09 pm
I went out to buy the 2N7000 transistor for button A but forgot to buy one for (*) connection smiley-neutral
86  Using Arduino / Project Guidance / Re: Simulate push button with arduino on: February 01, 2012, 11:05:19 am
Yes, my bad of course it's a diode!
Just need to go out to buy a 2N7000
87  Using Arduino / Project Guidance / Re: Simulate push button with arduino on: February 01, 2012, 10:52:58 am
So, the (**) is a 2N1000 transistor ?
and A connects to actual mode button (top pins), that works like 3.3v and when pressed goes to 0v, correct?

And (*) can be any NPN transistor like 1N4148?
and B is connected to actual powerbutton (bottom pins) connected to collector and top pins to emitter, so that when i set HIGH it's like pressing the button, right?
88  Using Arduino / Project Guidance / Re: Simulate push button with arduino on: February 01, 2012, 08:04:52 am
the problem is that without arduino connected (by USB), but sharing grounds the camera turns on then afterthought few seconds off.. and does that continuosly.
I have a pushbutton connected to arduino (I have tested it separately) and when I press it goes high, when its normal its low.
so I just put the same code but to drive the pnp transistor (for power button)
so when I press it'd drive high the powerbutton of camera..but since the campera is looping on/off I don't know what's wrong
89  Using Arduino / Project Guidance / Re: Simulate push button with arduino on: January 31, 2012, 07:19:34 pm
weird, now that i have GND of camera connected to arduino's ground, when the emitter leg is connected to the top of switch and collector (from pnp transistor) connected to bottom, camera switches on and off continuously without arduino  being on :o
90  Using Arduino / Project Guidance / Re: Simulate push button with arduino on: January 31, 2012, 07:06:35 pm
Ok i think i forgot to connect the GND of the camera to the arduino one.
let me check
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