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Aug 4, 2011 How to find out the SRAM consumption of an Arduino sketch |
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- Build the sketch
- Find /tmp/build*.tmp folder. There should be one, if you see multiple then rm -rf /tmp/build*.tmp and rebuild the sketch. Only one build folder should be in the /tmp (for simplicity
- run avr-size /tmp/build*.tmp/[sketch_name].elf
- sum of data and bss values if the number you’re looking for
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Jun 20, 2011 Reading ATtiny85/45/25 Internal Temperature Sensor |
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 ATtiny85 has internal temperature sensor I am working on one of my projects from RTFMs video blog (check out http://rtfms.com) that requires temperature sensing in a very small packaging. Naturally my choice is ATtiny85 – an awesome little chip from AVR that besides other goods (like 6ch PWM, serial interface etc) has internal temperature sensor. So I decided to use one. That wasn’t easy, but after a few hours of digging forums and datasheets I came up with a class that does the job with quite impressive reliability and precision.
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Jun 3, 2011 Choosing best high-end HT (amateur radio handheld transceiver) |
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Here is some information for those looking for a high-end HT. My requirements are:
- At least dual-band (tri,quad-band is a plus), including 144 and 440 bands at minimum
- Good wideband receiver
- All-mode receiver
- Convenient control
- Weather proof
- Ruggedly built
- Having a lot of features, leaving a lot of space for experimentation
- Major brand
- Price should be “reasonable”. It’s clear that an HT with the features listed above won’t be inexpensive, but I want to avoid paying extra for features that I don’t need or paying for something I can get cheaper in a different radio.
These are very expensive requirements and only a few HTs fit them. There are three major companies that produce something that fits most of the requirements: Icom, Kenwood and Yaesu with the following models:
| Icom |
Kenwood |
Yaesu |
 Icom IC-91A, from $320, dualbander, upgradable to D-STAR |
 Icom IC-92AD, from $540, dualbander, suports D-STAR |
 Kenwood TH-F6A, from $304, legendary radio, excellent scanner, tribander, superwide receiver (0.1MHz-1.3GHz), 5W on all three bands |
 Kenwood TH-D72A, from $485, dualbander, has GPS and APRS support |
 Yaesu VX-7R, from $320, quadbander, waterproof |
 Yaesu VX-8DR, from $410, quadbander (with limitations on 220 and 50), advanced APRS support, GPS and Bluetooth upgradeability, WIRES, tree receivers, stereo WFM |
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