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Seeking solder/flux recommendation
My standard soldering "recipe" is Kester 245 flux cored solder with Kester 951 liquid flux.  Most of my work is SMD by hand (little through-hole, no reflow).  My goal is...
Tue. Dec 27, 2016 - 01:17 AM
Atmel-ICE + AS6.2 + ATMega6450: Unable to enter programming mode
I'm trying to bring up a new board of mine based on an ATMega6450.  I'm running AS6.2 on Win7 x64 with Atmel-ICE (current firmware).  A week ago I was able to write to...
Tue. Nov 29, 2016 - 05:08 AM
EXTCLK vs. EXTXOSC
Does anybody know the difference between these two choices for the SUT_CKSEL fuse? This is for an ATMega6450, but I imagine the answer is the same for all Megas (or even all AVRs...
Sun. Nov 20, 2016 - 02:55 PM
SUT_CKSEL decoding for ATMega6450
So, I'm getting ready to program an ATMega6450 for the first time and notice all these options for the clock source (below).  I'm using an external 32kHz oscillator (the...
Sat. Nov 19, 2016 - 12:24 AM
Analog ground and AREF on ATMega6450 when not using ADC
I'm working on an ATMega6450 design that won't be using the ADC.  The data sheet says to connect AVCC to VCC in this case, but says nothing about AGND or AREF.  Should...
Mon. Oct 3, 2016 - 04:36 AM
Sharing JTAG pins with outputs
I'm working on an ATMega6450 design where I'll be using all the IO pins.  Programming and debug are via JTAG, but I also need these pins for output.  They'll be driving...
Mon. Sep 19, 2016 - 12:28 AM
How to filter out a power-on spike?
I have an ATTiny85 design that I power from a 24VDC wall wart.  My circuit has an LDO generating 5VDC from the 24VDC (there are no other active components on the 5V rail so...
Wed. Sep 7, 2016 - 01:09 AM
How does an SPI slave know it's received new data?
I'm thinking of using SPI in a project, specifically in daisy-chain mode where I might have 10 slaves and one master (all ATMegas of a variety TBD).  How does a slave know...
Sat. Jul 16, 2016 - 06:56 PM
Seeking tips on interfacing to 24VDC
I need to interface an ATTiny841 to an industrial controller that uses 0V - 5V for a logic 0 and 12V - 24V for a logic 1.  To output from the 841 to the controller I'm just...
Tue. Jan 5, 2016 - 06:39 PM
Using current sensing with a servo motor to measure force
I'm going to be building a servo motor-driven two-finger gripper for a robot whose gripping force I need to measure.  I'm thinking of using AVR-based current sensing on the...
Tue. Dec 29, 2015 - 07:04 AM
Seeking Atmel Studio 6
My system crashed and as I reinstall everything I notice I don't have a copy of AS6 and Atmel only has AS7 on their site (as far as I can tell), which I don't want.  Can...
Mon. Nov 16, 2015 - 09:12 PM
Should fuses be set first during in-system programming?
I'm having some trouble bringing up a new ATTiny841 board, so I'm trying to think of everything I might be doing wrong.  One thing that comes to mind is the order in which I...
Wed. Jul 15, 2015 - 06:06 PM

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