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Example of an ASM function in a C project?
I want to call an ASM function from C, and I'm stuck at even getting the ASM file to ASM. I created the file via AS6 (call it foo.s) and .include-ed the proper .inc file and a...
Monday, 28 October 2013 - 18:03
Anybody hooked up an AVR to WS2812 RGB LEDs?
I just started looking at these guys and wrote some preliminary code yesterday (on paper, haven't gotten around to testing it). Anybody else playing with them? Here's the...
Sunday, 27 October 2013 - 16:25
Which boot loader?
I've used bootloaders for other uC families, but not for AVR. Is there a protocol standard? If not, how does one get Atmel Studio to live with a given standard as executed by a...
Wednesday, 25 September 2013 - 01:30
Any idea where to look for 1x33 sockets?
I need something like these, but 1x33: http://www.ebay.com/itm/100pcs-G... I'd be happy to buy 100 to 1000 if I could find them at a non-insane price (i.e. <<$1). Any ideas...
Thursday, 29 August 2013 - 23:02
Is there a standard ISP interface for ATtiny20?
I need a small AVR and the ATTiny20 seems to fit the bill (Normally I use ATMega48/88/..). However, unless I'm missing something, the '20 does not seem to use the standard ISP...
Wednesday, 14 August 2013 - 17:35
Some data on generating random numbers via ADC
I've been playing around with this idea this morning, and have a bit of data. The idea is simply to regard the LSB of an ADC conversion as a random value (1 or 0) and generate a...
Thursday, 20 June 2013 - 18:34
Anybody know about swimming pool electric valves?
Situation: our temperature controller for our solar heated swimming pool isn't working, and it's a real pain to manually switch the valve back and forth to maintain a nice...
Monday, 10 June 2013 - 16:45
How wide do you make your SMD IC pads?
I'm more software than hardware, so I'm looking for some advice here. One rule I found at some IC manufacturer was to add 0.1mm to the pin width if the pin spacing was > 0.5mm,...
Friday, 17 May 2013 - 01:14
What if the input voltage to a boost regulator is too high?
Suppose I have a small boost regulator to bump up 2 AA cells to 5V, and I want to extend the battery life by going to 3 AA cells (4.8V with fresh batteries). This is outside the...
Monday, 29 April 2013 - 23:42
GPIO input response to analog voltage?
I want to use the "even" 3 pins of the 6-pin AVR ISP to power a Mega48 device and also to provide an analog control voltage on pin 4, which connects to MOSI. Unfortunately, for...
Monday, 22 April 2013 - 17:50
What's the minimum acceptable reset circuitry?
I've always used an external resistor and capacitor on the AVR reset pin, but now I have a very small board that would benefit from losing one or both of those components, if...
Wednesday, 20 March 2013 - 18:53
Electrically sync a mechanical clock?
Recently I picked up a big mantel clock for $5 at a garage sale down the street. The clock uses a hidden pendulum. Like any mechanical clock, with much fiddling it can be made...
Wednesday, 26 December 2012 - 05:28

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