AVR w/ asynchronous counter?

Started by frank in sci.electronics.design4 years ago 11 replies
AVR

Hi all, I'd like to make a very simple frequency counter (should be single chip ideally), let's say to max 25 MHz more or less, 6 digits...

Hi all, I'd like to make a very simple frequency counter (should be single chip ideally), let's say to max 25 MHz more or less, 6 digits resolution. A PIC microcontroller, using an internal counter with asynchronous external clock is one possible solution. However, I would greatly prefer to use an AVR microcontroller here as I already have lots of code and experience with them. On the se...


Tiny AVR

Started by linnix in sci.electronics.design8 years ago 30 replies
AVR

We need a small chip with absolutely lowest power, so for the attiny4: Top of the spec stated 200uA at 1MHz, but nothing about...

We need a small chip with absolutely lowest power, so for the attiny4: Top of the spec stated 200uA at 1MHz, but nothing about 125KHz. Bottom of the spec has some chart of around 30uA at 125KHz. Can this be trusted? If so, why don't they say so at the top? I would think that's an important marketing data. Can it run at 32KHz like some other AVR chips? Anyone with real experiences?...


ESD protection for microcontroller pin that is to be touched

Started by Rene in sci.electronics.design8 years ago 26 replies

Hi! I am designing a touch sensor on an AVR micocontroller. I have been working on the Qtouch library for days now but with no luck, there is...

Hi! I am designing a touch sensor on an AVR micocontroller. I have been working on the Qtouch library for days now but with no luck, there is nothing to be seen on the pins with the scope after flashing a sample program into the mcu. It has been a big PITA to even get the program to compile because the samples are made for AVR studio and Qtouch studio which are windows-only and I use ...


A $5 Arduino?!!

Started by Anonymous Remailer (austria) in sci.electronics.design6 years ago 5 replies

http://www.indiegogo.com/projects/iteaduino-lite-most-inexpensive-full-sized-arduino-derivative- board At first I was presently surprised...

http://www.indiegogo.com/projects/iteaduino-lite-most-inexpensive-full-sized-arduino-derivative- board At first I was presently surprised but after a while I started to wonder. Knowing that the cheapest AVR device costs about $3-$5 I started to investigate how they could build a complete board with MPU for $5 including shipping. It turns out the Chinese have CLONED the Atmel AVR process


How can it work?

Started by Piotr Wyderski in sci.electronics.design4 years ago

http://scanlime.org/2008/09/using-an-avr-as-an-rfid-tag/ The hacks are described, but the question is: why there is no MCU latch-up when any...

http://scanlime.org/2008/09/using-an-avr-as-an-rfid-tag/ The hacks are described, but the question is: why there is no MCU latch-up when any of the ends of the coil connected to the clock pins goes below GND? Best regards, Piotr


looking for ASKIR chip

Started by TTman in sci.electronics.design8 years ago 1 reply
AVR

I've seen the CS 8130 chip, but it's expensive. Anyone know of an alternative ? I'm looking for receive only,(if it exists) 500kHz nom.mod. Tx...

I've seen the CS 8130 chip, but it's expensive. Anyone know of an alternative ? I'm looking for receive only,(if it exists) 500kHz nom.mod. Tx is easy with an AVR.... Rx not so easy. TIA


HT AVR

Started by Servo Kon in sci.electronics.design8 years ago 4 replies
AVR

Since its inception in 1990, Servokon has left no stone unturned in becoming the best Industrial Servo Voltage Stabilizer Manufacturer in Delhi....

Since its inception in 1990, Servokon has left no stone unturned in becoming the best Industrial Servo Voltage Stabilizer Manufacturer in Delhi. We have manufactured our products to match the standards and changing requirements of our customer. To know more about us please visit: http://www.servokon.in/


OT: Oooops!

Started by Jim Thompson in sci.electronics.design8 years ago 6 replies
AVR

Oooops! Technology has caught up with me... Looks like the modern world of home theater all talks HDMI. (All my present A/V is 18 years...

Oooops! Technology has caught up with me... Looks like the modern world of home theater all talks HDMI. (All my present A/V is 18 years old :-) So I looking for receiver recommendations. I'm looking at the Denon AVR-1312... http://tinyurl.com/8xsbgbs Comments? Alternative recommendations? Thanks! ...Jim Thompson -- | ...


"modern" C++ and microcontrollers: match made in heaven?

Started by bitrex in sci.electronics.design3 years ago 72 replies
AVR

"Conventional wisdom" says that one should always stick to languages like C and ASM when writing code for "resource constrained" processors...

"Conventional wisdom" says that one should always stick to languages like C and ASM when writing code for "resource constrained" processors like the AVR and el cheapo ARMs. My somewhat-educated opinion is that it's not true. At least, not anymore. Instead of just bloating the code, the constructs available in the recent variants of C++ compilers (C++11 and later) allow you to unleash ...


A/V Receiver Recomendations?

Started by Jim Thompson in sci.electronics.design8 years ago 4 replies
AVR

Pardon me if this is a repost for you. For some reason it totally vanished here: Technology has caught up with me... Looks like the modern...

Pardon me if this is a repost for you. For some reason it totally vanished here: Technology has caught up with me... Looks like the modern world of home theater all talks HDMI. (All my present A/V is 18 years old :-) So I looking for receiver recommendations. I'm looking at the Denon AVR-1312... http://tinyurl.com/8xsbgbs Comments? Alternative recommendations? Th...


PIC/dsPIC development

Started by bitrex in sci.electronics.design2 years ago 90 replies

I might have to work on a project involving dsPIC code which I don't have a lot of experience with, I'm primarily an AVR and ARM guy. What's...

I might have to work on a project involving dsPIC code which I don't have a lot of experience with, I'm primarily an AVR and ARM guy. What's the hip current toolchains/dev boards y'all like to use for PIC development on Linux or Windows desktops nowatimes?


Using microphone to measure Db(A) and Db(C) ?

Started by Skybuck Flying in sci.electronics.design11 years ago 34 replies
AVR

Hello, I have two microphones: 1. A Fica CMP-202 computer microphone. (I got it for free a long time ago from somebody.) 2. A...

Hello, I have two microphones: 1. A Fica CMP-202 computer microphone. (I got it for free a long time ago from somebody.) 2. A Pyramid/Pole like microphone DM-A409 that came with my 7.1 Receiver (Denon AVR 1909). (Bought this recently... seems quite an impressive microphone according to some charts it was able to capture ?) Anyway I was wondering if these microphones are suite...


Mains fluctuations

Started by Don Y in sci.electronics.design3 years ago 32 replies

I notice, each morning, that several of the UPS's engage at nearly identical times. No visible dropouts (i.e., lights don't flicker). UPS's...

I notice, each morning, that several of the UPS's engage at nearly identical times. No visible dropouts (i.e., lights don't flicker). UPS's claim either "distorted input" (which typically leads to a ~1 second event) or "AVR" (which persists for 10-15 seconds at a time). [The latter doesn't require the unit to switch to battery power] The interesting thing is that it is "like clockwork". ...


El cheapo sensor

Started by bitrex in sci.electronics.design2 years ago 1 reply

Some of the AVR microprocessors have an on-die temperature sensor and bandgap reference, including the 75-cent-in-quantity 8 pin ATTiny45. By...

Some of the AVR microprocessors have an on-die temperature sensor and bandgap reference, including the 75-cent-in-quantity 8 pin ATTiny45. By connecting up the ADC registers the right way it can measure its own supply voltage and use that to help calibrate the temperature sensor; even without more sophisticated calibration temperature measurements seem accurate to within a couple degrees...


Toslink audio question

Started by Andy K in sci.electronics.design4 years ago 3 replies
AVR

I connected my toslink optical cable from my TV to a Denon AVR-1801 Digital Theater System AV . But I am getting no sound. It appears that...

I connected my toslink optical cable from my TV to a Denon AVR-1801 Digital Theater System AV . But I am getting no sound. It appears that the receiver does not detect the audio signal from my TV. The Toslink cable does show a red light, so I think the cable is good.


HT AVR

Started by Servo Kon in sci.electronics.design8 years ago 3 replies
AVR

Due to customer centric strategy, we have been able to achieve a huge customers in Native indian, Nepal, Bhutan, Saudi Arabic, UAE...

Due to customer centric strategy, we have been able to achieve a huge customers in Native indian, Nepal, Bhutan, Saudi Arabic, UAE and Afghanistan. NTPC, Native indian Oil, Delhi Jal Board, Doordarshan, A I R, I I T, Samsung and I T I Ltd. are some of our major customers. To know more about us please visit: http://www.servokon.in/


Hardware scripting (a better Arduino)

Started by bitrex in sci.electronics.design3 years ago 16 replies

As someone pointed out a while back while the Arduino toolchain seems to be very popular for developing hobbyist embedded applications for...

As someone pointed out a while back while the Arduino toolchain seems to be very popular for developing hobbyist embedded applications for AVR/ARM, but the API and IDE is kind of a mess. The API is a bastardized subset of C++ where a lot of things don't work and which most users only use to write kludgey, procedural C-like code; you have C-like global functions such as "digitalWrite" whi...


STM8S programming.

Started by Daniel Pitts in sci.electronics.design6 years ago 6 replies
AVR

I was looking for a cheap MCU with > 384 bytes of memory and at least 6 IO lines and 16MHz or better. The cheapest I found on digikey for my...

I was looking for a cheap MCU with > 384 bytes of memory and at least 6 IO lines and 16MHz or better. The cheapest I found on digikey for my requirements was this one: http://www.digikey.com/product-detail/en/STM8S003F3P6/497-11946-5-ND/2765682 I have some experience programming AVR chips, but no experience with STM. I'm an experienced C and C++ programmer, so writing the actual cod


C++ and stuff on embedded processors, again

Started by bitrex in sci.electronics.design3 years ago 119 replies
AVR

So conventionally the idea is that things like dynamic memory allocation, smart pointers, modern C++ abstraction and templates etc. is too...

So conventionally the idea is that things like dynamic memory allocation, smart pointers, modern C++ abstraction and templates etc. is too "heavyweight" to use on 8 bit processors. Not really true at all, here's the output from a smart pointer implementation I wrote using a custom embedded-appropriate memory allocation policy in straight C++11 for the AVR Mega series; this is the outp...


Latest CC scam

Started by Don Y in sci.electronics.design3 years ago 42 replies
AVR

Call claiming to be from for having CC ending in : "Please call us immediately to discuss some suspicious activity on your...

Call claiming to be from for having CC ending in : "Please call us immediately to discuss some suspicious activity on your card! Call us any time of day at 800 379 8461" Of course, you *know* the first thing that will greet you will be an AVR system that will request your *full* credit card number followed by some questions to