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1  Using Arduino / Displays / Re: J204A 20x4 schematics/diagram wiring on: April 09, 2014, 04:55:59 am
Does it really work with 3.3V, as sellers claim?
2  Using Arduino / Project Guidance / Re: Arduino 3.3V and LiPo UPS on: March 14, 2014, 10:52:55 am
Thank you, but it looks to me a simple li-po charger, not a power back-up solution (UPS).
3  Using Arduino / Project Guidance / Arduino 3.3V and LiPo UPS on: March 14, 2014, 09:27:51 am
I'm looking for an easy and smart  smiley-razz way to have a 3.3V Arduino PRO mini with one little LiPo (1 cell only - 1S)  embeded, acting as UPS.

LiPo must to be on charge when external power (from DC or USB) is available and feeds Arduino when DC or USB is unplugged. Of course, Arduino mustn't turn off in the meanwhile!

I know that Olimexino does it and I would like to do the same with Arduino PRO mini.

I don't want to use shield. It must be a very cheap solution. I found a couple of ICs that could be useful: MAX1551/5 and ltc4071.

Has anyone already worked on this matter?!
4  Using Arduino / Programming Questions / Re: How to use RDA5807 on: March 13, 2014, 06:20:25 am
Great, very interesting! I will follow this topic. I've just bought this module and I'm interested to get time info from RDS, for a simple table clock project.
5  International / Hardware / Re: Ricevitore fm TEA5767 e rds on: March 13, 2014, 03:05:59 am
Ci sarebbe anche un altro modulino molto economico che sembra funzionare anche meglio: RDA5807M

Qui almeno ne parlano bene:

www.raspberrypi.org/phpBB3/viewtopic.php?t=59907

Ha anche il dec RDS
6  Using Arduino / Displays / Re: Arduino LCD screen on: March 12, 2014, 10:32:14 am
Please, do you know how to control backlight brightness digitally from code?
7  Using Arduino / Displays / Re: 5V IIC/I2C/TWI LCD Module Adapter For Arduino from eBay on: March 12, 2014, 10:27:08 am
I'm interested in that cheap module too. Please, may you confirm that it has "Digital control of LCD backlight brightness", as LCD Backpack - I2C has?
8  Using Arduino / Audio / Re: USB-MIDI to Serial MIDI withUsb Host Shield - Success... But... on: February 26, 2014, 03:42:06 am
Hi,
I would like to achieve exactly the same result and I found your post extremely useful to me. Thank you!

I have an Arduino Leonardo (Olimexino) and I've just ordered the same USB HOST shield V2. Hope the header pinout doesn't require any modification. Do you need to connect the ICSP too?

My question is about the power: does it work with 5V or 3.3V? I would like to make both of them working with 5V.



9  International / Hardware / Scelta stazione saldante on: July 15, 2013, 03:50:41 am
C'era un post già aperto sull'argomento, a cui pero non era possibile rispondere. Apro questo, sperando sia la sezione giusta!

Vorrei prendere una stazione saldante senza grosse pretese, diciamo sui 50 euro. Ho visto che ce n'è un po' da tutti i prezzi e non saprei come orientarmi. Vorrei solo la possibilità di cambiare le punte, magari per "dissaldare" gli smd (non saldarli in quanto non ne sarei capace, al massimo li sostituisco con componenti normali). Ho visto poi alcuni modelli con la punta in ceramica.... insomma, qualche consiglio?
10  International / Software / Re: Come funziona il comando map(value, fromLow, fromHigh, toLow, toHigh)? on: January 31, 2013, 01:13:03 pm
Ottimo, direi di si:

se analogValue è 512 -> degree diventa 90

Grazie
11  International / Software / Come funziona il comando map(value, fromLow, fromHigh, toLow, toHigh)? on: January 31, 2013, 12:36:11 pm
Non riesco proprio a capirlo...  smiley-red  potete farmi un esempio?
 smiley-razz
12  Using Arduino / Project Guidance / Arduino Leonardo and touchpad on: January 29, 2013, 11:15:18 am
Following the info found here: http://sparktronics.blogspot.it/2008/05/synaptics-t1004-based-touchpad-to-ps2.html I was able to interface a Laptop touchpad to the PC, through Leonardo HID device.

Everything works fine: X, Y, Left and Right click and it acts as a mouse 100%.

What I can't manage is the scroll gesture. Synaptics T1004 ic has some pins to receive horizontal and vertical scroll (active LOW - I suppose for external controls), but I can't get how to handle. Any idea?
13  Using Arduino / Audio / Re: Using Arduino Leonardo as MIDI device on: January 17, 2013, 03:44:29 pm
Moco released the 32u4 version. 

14  General Category / General Discussion / Olimexino 32U4 to trade with Teensy (2.0, ++, and 3.0) on: January 15, 2013, 01:42:27 pm
I've just received a brand new Olimexino 32U4 (Leonardo compatible with nice features as 3.3 power and Lipo charger embedded) but I figured out that it doesn't be recognized as midi HID device, whilst Teensy (2.0, ++, and 3.0) do.
So, I wonder if anyone is interested in tradeing them.
 smiley-mr-green
15  International / Software / Leonardo e MIDI HID device on: January 15, 2013, 08:20:39 am
Ho acquistato una scheda simil-Leonardo (OLIMEXINO-32U4) attratto dalla caratteristica di funzionare come HID device e con l'intenzione di farci un controller midi, ma temo di aver fatto un errore. Credo infatti non ci sia modo di farla riconoscere dal PC come interfaccia MIDI, come invece fa il Teensy o l'HIDuino. E' così?
 smiley-roll
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