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31  Using Arduino / Displays / Re: TFT 3'2 problems on: March 20, 2014, 06:55:20 pm
That LCD WILL NOT WORK @ 5V... Get a shield to interace it.. If you continue attempting to wire it directly you may well damage the part..

Doc
32  Using Arduino / General Electronics / Re: shift register resiliance? on: March 20, 2014, 06:35:43 pm
As long as the device absolute maximum limits are not violated it should last a very long time...
I wouldn't worry about wearing it out.. I would however reaad the data sheet and verify that your power supply and I/O circuitry don't violate the Absolute Maximum parameters listed on the data sheet..

Doc
33  Using Arduino / General Electronics / Re: Transistor, MOSFET on: March 20, 2014, 06:31:05 pm
The C945 (2SC945) that you have is a nice choice as it is a very high gain (Beta) GP NPN Silicon transistor... Any of them are more than suitable but you already have the C945 transistor..

Doc
34  Using Arduino / General Electronics / Re: another component building question - 3.3V regulator, incorrect package on: March 20, 2014, 06:21:38 pm
I made an error the part that I use is an MCP1702.. the numbers are the same.. 16.5 V input Max and 3.9V min @ 2 uA quiescent current... They can be purchased from Microchip direct for $0.48 Ea /0 -  25 pieces. The data sheet is attached. Here is the Link..  http://www.microchip.com/wwwproducts/Devices.aspx?product=MCP1702#pricindAndSamples

Doc

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35  Using Arduino / General Electronics / Re: A kickstarter project - looks like a good power module to buy on: March 20, 2014, 06:12:52 pm
I just signed up for the freebie and I'm really looking forward to seeing this thing take off... It's a really Ideal universal power supply building block..

Doc
36  Using Arduino / General Electronics / Re: A kickstarter project - looks like a good power module to buy on: March 20, 2014, 06:05:08 pm
And the link to your reference about what Pololu sell is?

Doc
37  Using Arduino / General Electronics / Re: another component building question - 3.3V regulator, incorrect package on: March 20, 2014, 05:41:38 pm
Yes, What you want is an MCP1703 from Microchip it's available in TO-92, SOT-223... Easily done with batteries as the input voltage range is 3.9 to 16V and the quiescent current is 2 uA... Microchip might well sample a few.. The data sheet is attached.

Doc
38  Using Arduino / Programming Questions / Re: Trouble uploading sketch. on: March 20, 2014, 05:10:27 pm
Yes... Difficult?

Doc
39  Using Arduino / Microcontrollers / Re: Arduino Clone & the Atmega16u2 on: March 16, 2014, 10:25:53 pm
 I would suggest you print the rats nest and compare it to the schematic.. Happens a lot with Vcc - Vdd and Gnd -  Ground errors in the parts lib's and with Protel/Altium if a part was off snap grid it frequently would affect connectivity and any part off grid is a real problem, Particularly a part moved after after 'unpacking' the component stack(S) that represent the parts to be placed.. When finished you will have 100 % agreement with your schematic or know why not..

Doc
40  Using Arduino / Programming Questions / Re: Arduino GPS Shield by iteadstudio.com on: March 15, 2014, 07:35:11 pm
The manual for the U-blox neo6 is available from U-blox for free... and TinyGPS++ works very well

Doc
41  Using Arduino / Programming Questions / Re: Displaying text on LCD using Sensor Shield v5 connected to Arduino MEGA2560 on: March 15, 2014, 02:42:35 pm
Sure there are many examples of that on this forum.. Since you have chosen not to describe what you want to do with the sensor shield or what the project is about... You'll understand that the answers you will receive will probably follow your input... or lack of it..

Doc
42  Using Arduino / General Electronics / Re: L298N is not working?? on: March 15, 2014, 02:05:11 pm
Whats up?

Doc
43  Using Arduino / General Electronics / Re: L298N is not working?? on: March 15, 2014, 12:49:38 pm
So Will I...   <He-Hee>

Doc
44  Using Arduino / General Electronics / Re: Question with level shifter CD4504B on: March 15, 2014, 12:33:55 pm
Yes, A PNP, emitter to 12V. PNP Collector is to Sw 12V.
PNP Base to a 10K resistor to +12V and to a 1K resistor to the collector on an NPN transistor Ground the NPN emitter and a resistor from the NPN base to Sw 5V and a 10K from the NPN base to ground..
Turning on the NPN turns on the PNP which switches 12V from it's emitter to it's collector (Sw 12V)

Doc
45  Using Arduino / Displays / Re: 3.2 TFT problem on: March 15, 2014, 06:29:50 am
The TFT requires 3V3 and the Arduino supplies 5V. This is the basis of your issues.. I would not connect the TFT to 5V it WILL DAMAGE IT, PERMANENTLY. A common method of interfacing TFT devices is a series 20K resistor in each signal line and you might need a better 3V3 source than the Arduino is capable of. The best method is an active shield with semiconductors for level shifting.

Doc
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