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Replacing electrolytic caps for the power supply board of a 30-year-old computer Hi, Besides playing with AVR microcontrollers, I collect vintage computers. I have acquired an Atari 1040STF, and I believe the caps on the power board need to be... |
Sunday, 5 July 2015 - 17:12 |
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Generating a clock frequency Hi, I follow the attached schematic to generate a 3.579545Mhz frequency, using the crystal 3.579545Mhz. In the schematic, I choose C1 as 22pF. The frequency... |
Saturday, 17 January 2015 - 22:54 |
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Analog GND and digital GND clarification needed Hi, Doing a project with SPI and MP3 player using the VS1003B MP3 decoder chip. I've found a lot of projects on the net that I can try out. One such project is... |
Friday, 2 January 2015 - 19:51 |
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SPI MOSI -> MOSI? Hi, Pardon for this rather basic question. But I just wanted to be sure. When I use AVRDude to program an ATMEGA via SPI using the USBAsp program, MOSI pin of... |
Friday, 2 January 2015 - 08:35 |
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Can tantalum capacitors be used instead of electrolytic ones? Hi, I am wondering if tantalum capacitors can be used instead electrolytic capacitors for the Vin and Vout of a power source? My power source is basically the USB... |
Monday, 29 December 2014 - 02:29 |
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Clock duty cycle Hi all, I am looking to make something fun with the MC6847, an old video display processor from Motorola. I browsed through its datasheet (http://people.ece.cornell.... |
Monday, 22 December 2014 - 19:38 |
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WinAVR reports a problem from the Makefile that is generated by Atmel Studio 4.19 Hi, I have the attached the generated makefile from Atmel Studio 4.19, but keep getting the below errors when I issue the make command from WinAVR, which I prefer to use.... |
Saturday, 20 December 2014 - 18:49 |
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Pulsing common ANODE LEDs via PWM Hi, I've bought a bunch of RGB LEDs, and based on the attached diagram, it looks like the LEDs are common ANODE. I am looking to use an ATMEGA328 just to try out if I... |
Saturday, 29 November 2014 - 17:24 |
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XTAL1 and XTAL2 questions Hi, Up until now with AVR devices, if I want high F_CPU freq for my AVR device, I would attach a crystal to the XTAL1 and XTAL2 with a couple 22pF caps. I've seen CPUs/MPUs, like... |
Friday, 5 September 2014 - 15:09 |
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Having one heck of a problem with JTAGICE mkII + ATMEGA8 Hi, I am trying to use the JTAGICE mkii to program the ATMEGA8 via ISP. AS61 recognizes the JTAGICE mkii programmer, but it can't or I can't set the voltage, which is stubbornly... |
Wednesday, 3 September 2014 - 18:39 |
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Having one heck of a problem with JTAGICE mkII + ATMEGA8 Hi, I am trying to use the JTAGICE mkii to program the ATMEGA8 via ISP. AS61 recognizes the JTAGICE mkii programmer, but it can't or I can't set the voltage, which is stubbornly... |
Wednesday, 3 September 2014 - 18:36 |
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PLL for ATTINY85 Hi all, I am doing a project that involves the ATTINY85. So far, all my AVR clock input is either the built-in RC or external crystal. What does it mean when the clock input for... |
Monday, 18 August 2014 - 04:07 |