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Looking for a sensor to detect steps
Often, for reasons of weather or otherwise, I will exercise on a step platform.  I count the steps mentally, but I want to wire up an AVR to do it for me so I can just zone...
Wednesday, 20 April 2022 - 00:15
RC on reset pin, necessary or not?
Since I started working with micros I've always added an RC on the reset pin.  This was always called for back in the day.  But now I'm thinking I missed a memo and that...
Wednesday, 13 October 2021 - 02:26
How do I create a branch target label in a macro?
I haven't needed to do this in decades, but I do now.  I need to create a local label inside an assembly language macro such that it (obviously) is different for each...
Saturday, 5 June 2021 - 22:01
Questions about PRNGs
I have a few questions about PRNGs.  Maybe somebody can point me to some answers online, or even answer them here.  Many thanks beforehand!   1) If a particular...
Tuesday, 20 October 2020 - 04:18
ARM SWD doesn't need nRESET?
I was looking at various small ARM Cortex boards on eBay and I noticed that many of them bring out Vdd, GND, SWCLK and SWDIO, but not nRESET.  The ARM SWD interface includes...
Tuesday, 29 September 2020 - 15:43
Is this the most useless voltage regulator ever?
I found some of these in a box so I looked them up.  A 5V regulator with a maximum input voltage of 6V ?!?!  What in the world would this be good for?  Maybe it's...
Sunday, 27 September 2020 - 21:14
I need to read simple files off a USB drive with minimum hardware. What approach should I use?
I have a potential application that would use USB drives to hold some configuration data, and I'm trying to understand the simplest approach to do this.  The application...
Tuesday, 31 March 2020 - 21:20
Will the world end if I ignore this?
Bought some micros cheap for hobby use.  This was on the bag.  
Wednesday, 24 July 2019 - 21:48
What was your first micro programming experience?
I'll tell you mine (and date myself).   Back in the mid 70s the price of 8080As had finally dropped down to something a student could afford, at $39.95 (James Electronics)....
Sunday, 21 July 2019 - 23:15
Any interest in Cortex M0+ ASM code to drive WS2812B LEDs?
Not sure if this is the right forum to ask, but I've written an ASM routine for Cortex M0+ to bit-bang output data for WS2812B LEDs that I'm happy to share.  The...
Monday, 24 June 2019 - 19:42
What's a good level translator from 3.3V to 5V? Either single drivers or multiples.
I have occasions where I need to drive 5V hardware, and I'd also like to work more with ARMs, which, with a few exceptions, top out at 3.3V.  So what are some standard...
Friday, 21 June 2019 - 20:13
Has anybody used the ADC LSB to generate random bit sequences?
I might have an application where such random bit sequences are useful.  I had the idea of connecting an output pin (which is doing its own thing driving some hardware)...
Tuesday, 18 June 2019 - 19:45