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For sale Olamef machine
WayneZA wrote: EDIT2: Buying resistors and caps by large volume is something I have done since I was young to save money. I still have some left from 40 years ago! Leads are a bit...
Thursday, 15 April 2021 - 07:51
Inverting Buffer, awkard legacy layout
For really good fun, check out the 646.  Bi-directional buffers with internal latches!  Whee!! (and yes, they have a nice 'bus pass through' layout.  One thing they...
Thursday, 15 April 2021 - 07:04
How to fix low LED light?
When, Mr. Lawson, was the last time you heard someone say "But I only changed this one thing!" and you believed them?    S.
Tuesday, 13 April 2021 - 11:12
How to fix low LED light?
Write to the pin's Data Direction Register (DDR).  Set that pin as an output.   Personally, I think they're right - a pin set as an input with a weak pullup (like what...
Tuesday, 13 April 2021 - 10:29
Software for CPLD design?
ABEL.  Alas, Horatio, I knew you well.  S.
Wednesday, 7 April 2021 - 09:25
ADC to use between computer and a hydrophone?
Unfortunately, I'm unfamiliar with those prefixes.  I know there's 1012 microphones in a megaphone, but hydro- and head-?  I'm having trouble converting.  S.
Thursday, 1 April 2021 - 01:33
External? Bus Keeper
Well, personally I wouldn't do it that way.    I'd consider a system monitor failure a complete system failure and accept that it'll take down the whole system while it'...
Saturday, 27 March 2021 - 22:25
Brushless DC motor suddenly reversed, MOS tube is broken
The colossal insanity of the trace layouts around the power MOSFETs make me think it's supposed to be an H-bridge - But who aside from Dr. Seuss would draw them that way?  S.
Friday, 26 March 2021 - 10:20
Brushless DC motor suddenly reversed, MOS tube is broken
Okay, for one you don't know what you are doing.  Brushless motors have phases - What you have for a schematic is for a brush motor.  And the diodes on the low side are...
Friday, 26 March 2021 - 09:55
Internal Eeprom reads 0xFF at Startup
I'd suggest getting some 2313A's.  The older ones were known to have some issues with the EEPROM, even if not that specific issue.  S.
Saturday, 20 March 2021 - 03:42
Internal Eeprom reads 0xFF at Startup
Edit:  Or not.  S.
Friday, 19 March 2021 - 18:07
Switching power between batteries and USB and allowing USB communication
Yes, 5us of power dropout will reset your AVR.  As meslomp pointed out, use diodes - they'll react a lot faster than 5us.  Cheaper, too, I'd imagine.  You might...
Tuesday, 9 March 2021 - 15:38