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Large CMOS or CCD image sensors
I'm considering replacing the eyepiece in a 6-inch newtonian reflector with an image sensor of some flavour... I've hacked up a web cam but the sensor at 1/4" is too small; the...
Sunday, 17 November 2013 - 08:09
Just what I need for the day job...
High temperature flash SPI chips... up to 8Gb at 175C, 1Gb at 200C: http://www.sesemi.co.uk/index.ph... Or there's a new TI chip http://www.ti.com/product/sm28vl... which is only...
Saturday, 19 October 2013 - 06:15
Riddle me this... where's the current going?
A straight-forward oscillator as above, 4MHz. The two gates are the only ones used on the package; all other inputs are tied high or low as most convenient for the wiring, about...
Wednesday, 27 February 2013 - 15:23
M644A vs M324P serial problem
Got an interesting one here... I'm trying to use UART0 on a 644A to talk to a u-blox6 GPS chip, and failing. The same code, same pins, same voltage, same clock speed, same...
Monday, 19 November 2012 - 21:40
Mega324A and SPI problem
What am I doing wrong, guys? I have some SPI code lifted from Dharmani's micro-SD card (and hopefully modified correctly for the different port and control register names) which...
Monday, 27 August 2012 - 16:50
5v to 3v3 interface thoughts...
This is the tale of a (now solved) subtle bug in a 5v to 3v3 level converter; it might help someone with a similar issue. In this case I was talking to some Ramtron FRAM. Recall...
Friday, 1 June 2012 - 05:51
[TUT] Signed and unsigned multiplication
A brief note on multiplying signed numbers Range: Using, for the sake of example, 8-bit numbers, it's clear that the number can take a total of 2^8 (256) discrete values. What...
Saturday, 14 April 2012 - 21:47
DC-DC converter - LTC3642
I started playing with this chip as a 5v-3v3 high efficiency voltage converter and was very impressed. I'm getting 92% efficiency on the power conversion at 3.3mA output (I still...
Saturday, 17 March 2012 - 16:46
File tab naming bug
Here's a good one: - open a convenient file in AS5 editor - 'save as' something else - observe that the file name on the editor tag has not changed - make changes to the visible...
Tuesday, 2 August 2011 - 06:16
Targetting multiple processors
Not sure if this is possible: I have a large application - almost fills 32k of ATMega324 but has a number of versions: two different processors, three different displays and...
Friday, 29 July 2011 - 08:43
printf, floats, and AVR5
All right, I'm sure there must be a way to do it, but I'm blowed if I can find it... Surely there must be a better way of getting floating point printf than including the line...
Tuesday, 26 July 2011 - 16:58
Aaargh. Optimisation breaks my code.
And optimisation is required to make _delay_ms work properly... Applies to AVR4 and AVR5; was fine with AVR3. Head bender time. For reasons I don't know and can't easily track,...
Monday, 27 June 2011 - 15:02

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