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"integer overflow in expression" error
Hi - I am getting a bunch of integer overflow in expression errors. I'm not entirely sure why, however. The relevant code looks like this: uint16_t foo; if (foo >= (12*60*60)) the...
Thursday, 5 January 2012 - 19:50
Which PWM mode to use?
Howdy - I'm using an ATMEGA168P to generate a rather fast PWM signal. My plan is to have the on time be fixed but the period be variable (it'll be updated quite often). Nominally...
Saturday, 17 December 2011 - 07:38
Possible to set fuse bits automatically?
Hi - I haven't used AVR Studio in a while... Last I remember I had to manually set fuse bits. Is there any way for the fuse bits to be set at the same time that my code is loaded...
Saturday, 17 December 2011 - 06:47
Standard/common coin cells?
Hi - I need a battery to serve as a backup system for a clock. I had been planning on using a CR2032 until I dropped it into my layout and realized how freaking huge it is. What...
Tuesday, 15 November 2011 - 07:56
IN-16 footprint? (nixie tube)
Hi - anybody know where I can find a footprint for an IN-16? I have a pinout, but I need to find out how far from the center of the device the pins are. Thanks!
Monday, 14 November 2011 - 04:47
How much does an ATMEGA168PV's internal reference suck?
I'm looking on page 319 of the datasheet for an ATMEGA168PV. It lists the internal reference as ranging from 1.0-1.2, with a nominal value of 1.1V. Is it really that bad? I mean,...
Thursday, 10 November 2011 - 18:24
Voltage regulator with high impedance out when unpowered?
Hi - I'm working on designing an AVR board that I would like to have a battery backup. My plan right now is to diode OR the battery (3V) and the output from the linear voltage...
Thursday, 10 November 2011 - 06:00
Repairing TV - worth it?
I have a TV that has stopped working. It'll turn on and be just fine for a couple minutes (sometimes 5+ minutes), and then it turns off and starts power cycling over and over. (on...
Sunday, 9 October 2011 - 19:35
Schematic symbols: pins like on IC or grouped by function?
Just curious here... Some people make their schematic symbols so that the symbol looks just like the IC (doesn't work for BGAs - but works for most other components). Others...
Saturday, 1 October 2011 - 06:43
What to do abot ungrounded outlets?
Hi - I just moved into a place with ungrounded outlets. Very, very old place. Cloth insulation on the wires, metal boxes (instead of the blue plastic ones), etc. It must have been...
Monday, 12 September 2011 - 19:47
Low cost battery backed RTC solutions?
Hi - can anybody recommend a cheap method of adding a battery backed RTC to an AVR? I know some AVRs have RTCs in them - but are any battery backed? I'm guessing my lowest cost...
Wednesday, 3 August 2011 - 18:09
Cheapest means of driving nixie tubes?
Hi - I'm looking at producing some 6 digit nixie clocks. There are lots of ways of driving these things... I'm looking for the cheapest (in terms of component cost). First of all...
Wednesday, 3 August 2011 - 05:09