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Arduino Uno - interrupt on serial rx Am I going bananas and/or missing something obvious? The limited amount of googling I have done leads me to believe that the only interrupts which can wake the processor from deep... |
Saturday, 13 July 2019 - 11:31 |
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Touch sensor weirdness... I'm pulling my hair out over this one. I'm using a nucleo for testing, rather than an AVR, hence it's here in general electronics though it is generisable to any controller (but... |
Saturday, 13 July 2019 - 09:20 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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[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 |
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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 |
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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 |
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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 |