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Use opamps to make unipolar bridge amp?
I have 0-5V from an avr pwm out. I want 2 opamps... one that goes 0-10V, the other goes 10-0V. Input of 2.5V gives 5V on both opamps. So it looks like there is a gain of 2 in...
Friday, 8 May 2015 - 18:11
Anyone ever heard of a brushless tachometer?
This pdf talks about them.... I've got one... the magnet has 4 spokes and they are NSNS. The coil is about 1K and .2henries. What they DONT say is it just a toroid? Or wound like...
Sunday, 3 May 2015 - 22:27
Atmel pc bootloader tool?
I have spent most of Sunday morning looking for the sw to appnote2054 on bootloaders. There is some src and exe somewhere of an Atmel PC bootload tool. Is it in studio6 somewhere...
Sunday, 26 April 2015 - 18:02
Remote edit/compile on windows?
Lets say I have a command line compiler on my computer at home. Lets say I want to do some edit/compile from out in the field. In the 70s or 80s this would involve rlogin or...
Wednesday, 22 April 2015 - 18:59
Does Blips4 work on com23?
After selling 1000s of boards with avrs, I have decided to try and use a bootloader for field upgrade. Gizmo has a mega644. I edited and assembled blips for a 644 and burned it...
Thursday, 9 April 2015 - 20:05
NXP bought Freescale
Heard it on Natnl Public Radio Mon on drive home.  
Tuesday, 3 March 2015 - 00:54
How to convert a gcc makefile and c and h files to an as6 project?
Here's a newbie question. I can't port the chanfatfs files from gcc to imagecraft, so I figgered I'd just try to compile it up with as6. So I hit as6, and after a while I get the...
Saturday, 24 January 2015 - 04:35
Hardware way to sync 328 timer0 and timer1?
I want to play with 3 channel pwm out, so I thinks: set xtal fuse for full swing osc, jumper xtal1 to pd4 and pd5 (t0 and t1 ext clk inputs), and now I have 4 8 bit pwms all...
Saturday, 24 January 2015 - 03:49
New mega PB versions in new imagecraft release
I guess the imagecraft compiler users already know this from the icc-avr yahoo group. I'm sort of curious if cv,iar, or atmel studio had support for these new avrs already?  
Thursday, 15 January 2015 - 04:35
SSI200W grid tie inverter innards
I've had this thing for a couple years. Red led was lit so I took it apart. Seems to have a mega16 in it!. There seems to be a lot of folks selling them on ebay, but not too much...
Tuesday, 30 December 2014 - 23:06
Compiling Chan foolproof fatfs with nongcc compiler
I extended the dly_us to handle F_CPU of 16MHz. But I notice he declares const char* in a bunch of places, and I'm wondering if he means 'strings in flash'. I always tic this box...
Monday, 22 December 2014 - 03:08
Magnetic field of a 4 pole magnet?
Assume this is the General Magnetics forum for a minute. I have the rotor out  of a gizmo made out of alnico. It looks like a + and the poles are NSNS around. If it was...
Thursday, 18 December 2014 - 20:50

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