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When you have a hammer, everything looks like a nail
My son totally surprised me last week by texting that he wanted to learn Morse code.  He's been using an app, but he needs a CPO (code practice oscillator).  I looked in...
Thursday, 20 December 2018 - 18:57
Home Automation, what do you recommend?
Not sure if this is a better fit for here or Off Topic.  Please move if this is the wrong forum.   Anyway, we're doing a large remodel on a 50 year old house, and I'm...
Thursday, 27 September 2018 - 02:59
Anybody used one of those ebay LCD display serial interface boards?
I just ordered a couple of these boards that are flooding ebay.  Thought they'd be interesting to play with.   https://www.ebay.com/itm/1X-IIC-...   Anybody have...
Friday, 24 August 2018 - 20:53
Does an enabled internal pullup remain active in power-down sleep mode?
Device is ATTINY_13.  I don't see anything in the data sheet about this (looking in the wrong places?).  I need a pullup (internal or external) on an INT pin for wakeup...
Friday, 12 January 2018 - 20:09
First time working with battery power, am I going down the right path?
I have to design an unusual device, with a small AVR (not yet selected) at its heart, that runs off 3 D or C cells.  When running the device will draw maybe 200 mA, but it...
Wednesday, 20 September 2017 - 23:00
Home automation - is X10 still the big player, or is there something else?
I want to control some (currently dumb) AC outlets for outdoor lights and such, and in the past X10 would have been the solution.  Is it still the main solution, or have new...
Friday, 18 March 2016 - 03:15
I need a special kind of switch
Here's my problem.  I need to wake up (and sleep) a battery-powered AVR by closing a switch or some other means, but I can't have any physical contact with the board or...
Saturday, 27 February 2016 - 22:58
Best (easiest, cheapest) RF connection method?
I'm posting this here because I didn't think it fit well into any of the wireless forums.  I need to replace wired buttons with some sort of RF key fob connection.  All...
Saturday, 29 August 2015 - 18:43
Christmas giveaway for students and noobs - blank MEGAxx8 PCBs
I found about 6 dozen of these blank PCBs in a drawer, from some past lifetime.  They're pretty generic, with 12 IO brought out on headers, and a 75175 serial translator....
Thursday, 18 December 2014 - 21:53
Useful add-ons for PCB prototypes?
This question is prompted by some good ideas I've seen here, and a few I've had on my own.  I thought it would be useful to collect them in one place.   So the question...
Wednesday, 10 December 2014 - 02:21
What counts as PWM?
I'm writing a tutorial episode on PWM, and I've come upon a rather basic question:   Does the term "pulse width modulation" apply only to signals where the pulses are regular...
Sunday, 28 September 2014 - 02:22
Anybody done a Kickstarter project?
I've been tempted to try a kickstarter project just for the experience.  I'd do something very simple, a 17x50mm RGB LED driver board (prototype PCBs already made and working...
Monday, 8 September 2014 - 20:53

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