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61  Using Arduino / Microcontrollers / Re: Using Arduino uno to burn bootloader error on: January 12, 2013, 09:37:01 pm
Auto-reset not disabled on the programmer I pulled the chip from the uno and hooked it up on the bread board with 16mhz crystal just as it is on the the uno Im doing it like this
http://www.gammon.com.au/forum/?id=11637

62  Using Arduino / Microcontrollers / Using Arduino uno to burn bootloader error on: January 12, 2013, 09:22:43 pm
Try to burn bootloader on to blank chips atmega328P

I get this error after about a minute
Quote
Error while burning bootloader
avrdude: stk500_getsync(): not in sync: resp=0x00


63  Using Arduino / General Electronics / Re: A cautionary tale with cheap ebay Voltage Regulators. on: January 11, 2013, 07:48:51 am
Quote
20 volt 2 amp drop that's 40 watts

This is a switching mode regulator.

Quote
There's onboard thermal regulation which prevents anything excess current being delivered to the LED.

That doesn't mean the less-than-excessive voltage from the regulator wouldn't cause excessive current / power dissipation on the led.

No, the board does not regulate current output at all: they call it a voltage regulator for a reason.


Read the data sheet it said if the output is shorted the chip decreases the voltage

you saying ohm 's law don't apply dherry if the voltage goes down the current can't go up.

20 volt 1 ohm load 20amps  5 volt 1 ohm load 5 amps

Now whats this say
Quote
(3) The oscillator frequency reduces to approximately 18 kHz in the event of an output short or an overload which causes the regulated
output voltage to drop approximately 40% from the nominal output voltage. This self protection feature lowers the average power
dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%.
64  Using Arduino / General Electronics / Re: A cautionary tale with cheap ebay Voltage Regulators. on: January 11, 2013, 07:20:18 am
If you look at the board you posted there no way that board can handle a 20 volt 2 amp drop that's 40 watts
the chip should shut down, lower its voltage not increase it.
65  Using Arduino / General Electronics / Re: pull up resistors and pull down resistors.. on: January 09, 2013, 09:13:04 am
I volt this one http://www.thebox.myzen.co.uk/Tutorial/Inputs.html  It has real " sound knowledge"

Nice site Mike
66  Using Arduino / General Electronics / Re: Making your own PCBs on: January 08, 2013, 09:38:52 pm
Make then in the bathroom with the vent On
67  Using Arduino / General Electronics / Re: Transistor on: January 08, 2013, 01:52:18 pm
How do you get this to work the OP didn't even tell what transistor he was having problems with.

I remember when I was a kid and tube's where king I read about transistor's and I got my hands on one and it
was a big power transistor I hooked it up as a amp to a crystal set and my speaker didn't put out sound.

I wasn't driving the base with a enough current to turn it on.  
68  Using Arduino / General Electronics / Re: Preventing PCB interference on: January 08, 2013, 01:39:31 pm
I would also keep h-bridge, MOSFET to one side of the board and not run any signal tracks under them.

I have seen that it works better to keep power and motor control switching more to there self. And run signal line to them far less noise pick up. And as said don't loop the gnd or the VDD line.

69  Using Arduino / General Electronics / Re: transistor current gain vs voltage gain. on: January 08, 2013, 01:28:18 pm

Grumpy_Mike You had not posted and when I did your post showed up so I left the quote. it just added to your post.
70  Using Arduino / General Electronics / Re: transistor current gain vs voltage gain. on: January 08, 2013, 01:12:57 pm
Quote
There are two types of transistors, which have slight differences in how they are used in a circuit. A bipolar transistor has terminals labeled base, collector, and emitter. A small current at the base terminal (that is, flowing between the base and the emitter) can control or switch a much larger current between the collector and emitter terminals. For a field-effect transistor, the terminals are labeled gate, source, and drain, and a voltage at the gate can control a current between source and drain.

I'll leave it But Bipolar transistor are current controlled
71  Using Arduino / General Electronics / Re: Arduino StandAlone problem on: January 07, 2013, 02:56:27 pm
On some long SK boards there is no connection 1/2 way between the power rails.  Move the power wires closer to the I.C.

That could be it he is half way down the rail
72  Using Arduino / General Electronics / Re: Arduino StandAlone problem on: January 07, 2013, 02:53:54 pm
Pull those caps off just to see if there loading the crystal I have seen to much bread board capacitance load the crystal.  
73  Using Arduino / General Electronics / Re: TC65I - MODULE Base board on: January 07, 2013, 08:04:14 am
Well I tried the link you posted and filled out the forum And there a whole new set of datasheets these tell you something thanks  Krodal
74  Using Arduino / General Electronics / Re: TC65I - MODULE Base board on: January 07, 2013, 12:38:38 am
Because it was useless, There datasheet doesn't even tell the pinout  P.S. I did it useless LOL
75  Using Arduino / General Electronics / TC65I - MODULE Base board on: January 07, 2013, 12:19:31 am
TC65I - MODULE Base board or shield to plug it in to any one seen one.

http://www.newark.com/cinterion/tc65i/module-gsm-gprs-quad-band-i2c-spi/dp/24R7673#accessories

There a so called datasheet for it but it doesn't have much info not even the pinout.
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