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61  Using Arduino / LEDs and Multiplexing / Re: Flickering Neopixel strip during Rainbow+Fade issue on: March 18, 2014, 11:01:36 pm
I don't see flickering more choppyness, ie not smooth.

It's not flickering on/off per say?
62  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.
63  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.
64  Using Arduino / General Electronics / Re: Suppression of electromagnetic interference at VIn on: March 18, 2014, 09:36:16 am
Use a different power supply... ?
65  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.
66  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?
67  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...
68  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.
69  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?
70  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
71  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
72  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.
73  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..

74  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.
75  Community / Bar Sport / Re: digital currency. on: March 17, 2014, 09:21:13 am
No resistor, still working fantastic soley voltage controlled smiley
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