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Discussion Title Created date
Non intrusive emulation / data logging
Say i have an application using an embedded controller, that uses a section of RAM to process data, what methods exist to interogate that memory without involving the orginal...
Wednesday, 3 April 2013 - 20:13
Serial programming interface - handshake / indicator circuit
Hi all, Below is a psuedo schematic for a "handshake and indication" circuit i am thinking of using. It hopefully allows a remote serial device to connect with an AVR embedded in...
Thursday, 28 March 2013 - 14:30
2W dc-dc - output reverse impedance when not powered?
Here's a small, dc-dc convertor: http://docs-europe.electrocomponents.com/webdocs/0dc6/0900766b80dc63f0.pdf When it has a suitable power supplied at it's input it obviously tries...
Tuesday, 26 March 2013 - 22:57
Internal module coms - anything better than RS-485?
Doing a quick design of a device that has a master controller, and between 1 and 10 slaves (depending on specification), they are all housed within the same box, but are on...
Monday, 25 March 2013 - 15:21
Zero range IR data transmission (USART)?
I have a controller design that needs to be IP68 sealed, as it will be used in a horrible environment (off road bike) and i wondered about using a zero range IR system for data...
Saturday, 16 March 2013 - 15:22
Spare uC pins. WHat do you do with them??
I have a design that uses just enough IO to need a 40pin ATmega device. I can't get the pin count down enough to use a Tiny or similar, so i have ended up with a pcb schematic/...
Friday, 15 March 2013 - 23:03
Decode 5 (or maybe 6) digital speed inputs (<1.5kHz max)
Hi ever helpful people! If i had a system that needed to read in 5 seperate digital signals and decode them (with capture compare for example) into 5 seperate speed values how...
Saturday, 16 February 2013 - 16:26
5 - 40VdcIn to 5vdc/ ~1A peak out, low parts count switcher?
hello Guru's of all things electric! Simple question, i'm sure it will have been asked before, but perhaps not in this exact flavour. I have a device, that can be powered from a...
Thursday, 7 February 2013 - 15:18
Inter-AVR USART BAUD rate - shared clock
Hi, I have a Mega32 and a Tiny4313 on the same pcb, right next door to each other, and data is going to be shared between them on the USART lines. The Tiny is clocked via the...
Wednesday, 3 October 2012 - 17:18
8x8 RGB LED matrix - typical refresh rate (Mega32 @20mhz)
I'm just laying down some project specs for a little device to drive am 8x8 RGB led matrix (yes, i know there are plenty of those already around, but you can't beat the learning...
Saturday, 22 September 2012 - 14:01
elegant coding (C) -changing multiple SPI "chip select&
Maybe because it's Friday, or perhaps i've just spent too long stareing at my pc this week, but i'm struggling a bit with what should be a fairly simple coding task! I have an SPI...
Friday, 14 September 2012 - 20:00
Unity gain op amp to protect IO lines
I noticed that a commercial device i had the schematic for used a unity gain op amp to provide protection for some IO lines to the micro, in this case to the adc. The layout was...
Saturday, 18 August 2012 - 13:29

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