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Crystals doing strange things - ideas? Hi all, Brief explanation: I built a small project using an ATTINY85 and a 22.1184 MHz. crystal. I edit the source using the NANO editor and compile/upload the code using a... |
Sunday, 20 September 2020 - 08:58 |
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AVR Interrupt Question. Hi all, I'm working on a project, part of which requires getting the RPM of a PC fan with a tach output. The fan has an open drain output which goes low twice per... |
Saturday, 8 August 2020 - 06:20 |
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Requesting advice: MOSFET or IGBT in place of BJT? Hi all, I would like some quick advice. First of all, please no "why do you want to do that" or "use a switcher" or any other things that are not what I asked. With... |
Thursday, 23 July 2020 - 11:55 |
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Power BJT strange functioning - am I doing something wrong? Hi all, I obtained two NPN BJT power transistors from DigiKey. They are by ST Micro and the part number is BUT30V. These are 100 amp, 250 watt parts in the "ISOTOP" (SOT-... |
Thursday, 23 July 2020 - 00:02 |
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Is it possible to tell between data in PROGMEM or SRAM at runtime? Hi all, If I do this: static const uint8_t bitmap[] __attribute__((progmem)) = { 0x7F, 0x04, 0x08, 0x10, 0x7F, 0x00, }; or this: static const... |
Wednesday, 6 May 2020 - 20:07 |
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ATMega8u2 strange problem Hi all. I have a clone Arduino MEGA board which uses an ATmega8u2 as the USB to serial link. It works fine. What I did was to change the low fuse of the 8u2 from... |
Monday, 4 May 2020 - 04:20 |
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Question about PROGMEM and __flash: can I eliminate a step? Hi all, I have lots of bitmap files (character font data for a graphics VFD display) in PROGMEM as such: #ifndef IBM_8X16_H #define IBM_8X16_H #define ibm_8x16 (... |
Saturday, 25 April 2020 - 13:26 |
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[SOLVED] Question: AVR, interrupts and ISR Hi all, I searched here and found quite a few posts about ISRs and interrupts, but none answered my question. Please consider this example code: volatile uint8_t x... |
Sunday, 29 March 2020 - 20:33 |
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SO8N package - pin 1? Hi all, I've got some 8 pin SOIC package chips in a tape. Pin 1 is not marked in any way on the chip! There is no notch on the pin 1 end, no dot molded into the part... |
Tuesday, 10 March 2020 - 23:23 |
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Wetted switch contacts Hi all, I tried an experiment today which was completely successful and the info may be of use to some. I have a small quantity of GALINSTAN which is an eutectic... |
Monday, 9 March 2020 - 05:25 |
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Calling a function by address Hi all, I would like to know if it is possible to call a function by address as well as pass data to it and return data from it? For example, if I write a function that takes two... |
Saturday, 7 March 2020 - 06:00 |
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AVR xml files Hi all, I use Linux and therefore cannot use or install AVR Studio. I don't even want to, but I do want to get a copy of all the AVR xml files that have individual chip... |
Thursday, 5 March 2020 - 10:36 |