Post Created date
ADC Voltage Drift
The problem was at the photodiode. The MEGA328 was rock solid and heat wasn't the issue.
Saturday, 12 June 2010 - 21:35
ADC Voltage Drift
Good point about sanity check. The photodiode has a large surface area, and is exquisitely sensitive to light. Even small movements will make readings bounce around, which is...
Friday, 11 June 2010 - 18:12
ADC Voltage Drift
Thanks for the replies. Very much appreciated. Yes I am using AVcc as Vref. The photodiode is receiving very low levels of light, so it should not be heating. I am using a...
Friday, 11 June 2010 - 17:48
How to best clean off flux?
Acetone applied with a Q-tip works great. A big can is cheap at any hardware store.
Tuesday, 24 November 2009 - 06:45
Minimum samples to measure a sine wave?
If half of the wave is negative with respect to ground, doesn't this need to be rectified somehow for the ADC to measure it?
Sunday, 1 November 2009 - 20:14
Can TQFP package be programmed with STK500?
Thanks David. I just have a couple. I Googled zif socket and it now all makes sense to me. Much appreciated.
Wednesday, 7 October 2009 - 19:44
Microntroller or dedicated chip for low battery indicator?
Thanks gentlemen for the excellent advice and information. I managed to put together a working circuit using an atmega168, and no need for an extra chip. By the way, the reason I...
Tuesday, 15 September 2009 - 03:20
Microntroller or dedicated chip for low battery indicator?
Quote:If you can supply the AVR with unregulated power from 3 AA cells (4 AA cells is too much while 4 NiMH cells might be ok), there is a trick you may be able to use to measure...
Thursday, 10 September 2009 - 15:44
Microntroller or dedicated chip for low battery indicator?
Thanks Mr Wagner and Arnold. Great information on batteries and picking a voltage regulator. If only I could do the Vulcan mind meld with you guys...
Thursday, 10 September 2009 - 06:31
Microntroller or dedicated chip for low battery indicator?
Thank you all for the replies. Arnold, your point is well taken. My desire is not a commercial device, so I am not thinking about savings over thousands of units. Just a couple...
Wednesday, 9 September 2009 - 20:08
Old Dog, New Tricks: 555 Timer in the trash
Doc JC, I have been trying to teach myself C and didn't know you could use BASIC for the AVR. I looked at your code, was puzzled and then realized it was in BASIC. I downloaded...
Tuesday, 14 April 2009 - 02:07
Old Dog, New Tricks: 555 Timer in the trash
Thanks JC. Much appreciated. It will only take me a week to get through that code! But, it will be worth it. I have been lurking around for a while looking through tutorials...
Monday, 13 April 2009 - 21:45

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