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Strange failure mode of toothbrush
My electric toothbrush used to have two speeds, press once for slow, twice for fast, a third time for off. Now it goes from off to fast to off. It's not likely to be switch bounce...
Saturday, 20 January 2018 - 14:55
How to: power consumption of intermittent, spikey projects
Seriously, how do y'all work out power consumption of interrmittent, spikey projects? I generally use one of two methods: a) Measure the running current by disabling the sleep,...
Wednesday, 6 December 2017 - 08:58
Diode pump voltage doubler to drive FET
I'm trying to drive an N channel FET from a Mega328 running on 3V (8MHz). I'm having trouble finding any through hole mounting device that will turn on properly at 3V. Since I don...
Friday, 13 October 2017 - 17:29
What voltage would you expect to see on a ceramic resonator?
I have a 24mHz resonator on a micro(not AVR, actually Kinetis) and the waveform is roughly 480mV peak to peak. Is this what you'd expect? I'm having trouble whereby as soon as I...
Friday, 7 October 2016 - 10:54
AVRISP MK2 stopped working.
For many years, I have used a few batch files to program ATTiny44 chips for a client. Every now and then he asks for 50 or 100, and I program them and forget about them for a few...
Wednesday, 18 May 2016 - 18:20
Guitar jack to line levels.
I know there are a few axemen on these forums, so... Anyone point me at a simple circuit to convert an electric guitar output to standard line in level? Preferably working from 3...
Friday, 18 December 2015 - 10:18
Better late than never...
Where were the ARM forums when I needed them?  
Monday, 6 July 2015 - 10:51
Wear leveling in Flash
I would search for this, but I can't find a search function... I am using a Flash chip(NOR memory). There are some user settings that change fairly frequently, and which I save to...
Tuesday, 7 October 2014 - 17:01
How to place dummy serial number in Flash at specific address?
I'm sure this has been asked many times before, and I'm sure that most of the answers have started with "why would you want to do that?", so here goes. A client of mine wants to...
Friday, 19 September 2014 - 12:37
Alternatives to malloc in embedded apps
My projects tend to use finite state machine. Different parts of the state machine can be fairly hungry for RAM, but by the nature of the application, these parts can not be...
Saturday, 5 July 2014 - 09:40
emitting .elf file for production
I seem to remember reading that AS6.x has a problem generating proper .elf files that contain all the fuse and lock bit info, along with the code. Is this still the case? If so,...
Friday, 16 May 2014 - 10:51
Migrate from Tiny44 to Tiny441?
I've done a quick search, but didn't find anything much. Anyone know if it's trivial to migrate Tiny44A code to a 441? Farnell are out of stock of the 44A... John
Monday, 28 April 2014 - 08:21