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466  Using Arduino / Project Guidance / Re: Do you think that this would be easy to do? Extreme criticism welcome! on: March 18, 2014, 06:44:06 pm
Easy.. not really
Time consuming,  hell yeah

I think you need to learn to walk before running.

Transistors on the inputs a typo?  I'd use voltage dividers on the inputs personally or zeners.
467  Using Arduino / General Electronics / Re: Driving an Analog 0v-10V Ballast with Arduino & IRL540N or RFP30N06L MOSFET. on: March 18, 2014, 09:46:06 am
If I understand your picture. ..

You're supplying 10v as a constant, and using pwm to switch the ballast on and off, 0 off 10v on, it's not going to give a 0-10v range which I think you want, having said that ..

If the load is controlled by the mosfet and not a circuit expecting a voltage in which it varies the output it should work... eg if 1v was supplied and it worked, then a capacitor could be used to vary it's voltage to the ballast via pwm.
468  Using Arduino / General Electronics / Re: Suppression of electromagnetic interference at VIn on: March 18, 2014, 09:36:16 am
Use a different power supply... ?
469  Using Arduino / General Electronics / Re: 5v, high amperage mobile power for neopixels (WS2812 leds) on: March 18, 2014, 09:32:28 am
I'm curious, why addressable leds?

Would it not be easier and cheaper to buy 2-3 1-5m LED strips ... they run from 12v so a small lead acid battery could run the strips for several hours and a lot easier to recharge. Switching them on/off is a doddle with an Arduino.
470  Using Arduino / General Electronics / Re: How to charge Supercapacitor? on: March 18, 2014, 09:25:21 am
If I attempted it, I'd use a pnp to charge the cap which powers the rtc... the transistor will also behave like a diode.

Is leakage even an issue? How llong will the rtc be running from the cap? Days?
471  Using Arduino / Programming Questions / Re: Need help with "speed optimization" on: March 18, 2014, 05:53:14 am
Try a pull down, try a 1k resistor from your input to ground...
472  Community / Bar Sport / Re: digital currency. on: March 18, 2014, 05:16:33 am
I think your LED is missing a resistor.  smiley-wink
i didn't realise LEDs had resistors in them...

About as far off topic...

But, I'm using a 11 watt led driven at 3.8v  pulling around 500ma, on a 50watt heatsink .

Been running it for about 2 weeks .... resistor not required.
473  Using Arduino / Programming Questions / Re: Need help with "speed optimization" on: March 18, 2014, 02:49:18 am
Regarding your circuit, do you have a pull down resistor on both interrupt pins?
474  Community / Bar Sport / Re: teaching debugging on: March 18, 2014, 02:45:26 am
I think I've spent more time debugging than coding, stepping through lines of code... over and over  smiley-sad again
475  Community / Bar Sport / Re: whats with the attitude on: March 18, 2014, 02:39:28 am
Big words upset people the most!

You flamboyant over opinionated discombobulated neanderthal  smiley
476  Using Arduino / General Electronics / Re: Switch 12v power with Arduino and MOSFET on: March 18, 2014, 02:35:33 am
Which is it? Tip41a or tip42g?

Well the tip42g is a power transistor not a fet, this particular pnp transistor relies on current to control your load, a fet relied on voltage.

You're mixing up your transistors.

You're better with an NPN or N-Channel, switching the base/gate to high.
477  Using Arduino / Project Guidance / Re: Controlling 12v 25w Heater on: March 18, 2014, 01:01:40 am
Re-arrange it  so you don't need to invert the signal..

478  Using Arduino / General Electronics / Re: Voltage regulator Batt Capacity Question on: March 17, 2014, 07:17:09 pm
7805

Be a 12v or 9v if they both have the same Amp/hour rating eg 5ah 9v or 5ah 12v the regulator will chew through the same power.
479  Community / Bar Sport / Re: digital currency. on: March 17, 2014, 09:21:13 am
No resistor, still working fantastic soley voltage controlled smiley
480  Community / Bar Sport / digital currency. on: March 17, 2014, 09:08:10 am
If google earth and bitcoin was somehow merged....

People could buy land, your own back garden if you wanted... and mine for resources, how much and the logistics would be that of bitcoin, mine for gold, diamonds, trade....

Add a layer, allow people to buy wood, stone, brick from anyone who is willing to mine it and sell it on as a profit.

So we end up with the ability to mine, and that's all one might do, another extension would be to be a developer and make buisnesses like in second life, except you have to trade for materials from the miners or resellers.

So there's no main "interface" you just add layers, want to sell cars, you write an extension/plugin everyone else can download use, have no 3D interface and just mine in the space you bought...

A virtual economy based on a farhinite resource, once resources begin running out prices go up , the periodic table is there to be mined for people to build with, with the possibility of say real companies buying into the virtual space to offer electric to your homes and houses....
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