Yeah thats interesting too. I always wondered what chips industrial PLCs use. Do they use commercial ones manufactured by large fab houses or do they program their own controllers with FPGAs, ASICs, etc?
How long can the arduino or those AVR/PIC chips run continuously? Say blinking LEDs on Pin 1. How long can it last until it skips a beat or stops working properly or downright fails?As long as you don't subject the chip to operating temperatures beyond their ratings and power supplied is always within proper ratings I see no limit to continuous operating, there is no 'wear out' factor for the chip. I have a 5x5x5 led cube run with a 328p chip that has been running non stop for over 2 years now, with only a house power outage stopping it momentary a couple of times. For example, if you make an RFID door to unlock it for a home automation application, you'd want the ensure your controller is quite reliable lol.The chip will not be the limiting factor to the system reliability, the power supply most likely will be or perhaps the electro-mechanical locking mechanics.Yeah thats interesting too. I always wondered what chips industrial PLCs use. Do they use commercial ones manufactured by large fab houses or do they program their own controllers with FPGAs, ASICs, etc?
How long can it last until it skips a beat or stops working properly or downright fails?
However, standard 8-bit AVRs are used all over in successful industrial and commercial products, and this has been the case for many, many years. - wjl Oct 15 '11 at 1:31[/i]http://electronics.stackexchange.com/questions/2324/why-are-atmel-avrs-so-popular
To make matters worse each shipment of parts not only had bugs but different bugs requiring a hardware and software change for each shipment. This may not be a big problem for a hobbyist but it's a disaster for a company that wants to put its product into production.
I expect that [AVRs] are very robust indeed. I would not expect MCUs from Microchip, TI, Maxim, NXP, ST Micro, etc. to differ significantly in that regard.
[Atmel] Microcontroller segment net revenues increased 95% to $892 million for the year ended December 31, 2010 from $458 million for the year ended December 31, 2009. The increase in net revenues was primarily related to increased volume shipments from customers for both AVR and ARM-based 8-bit and 32-bit microcontrollers. Microcontroller net revenues represented 54%, 38% and 33% of total net revenues for the years ended December 31, 2010, 2009 and 2008, respectively.
About 55% of all CPUs sold in the world are 8-bit microcontrollers and microprocessors. According to Semico, over four billion 8-bit microcontrollers were sold in 2006.A typical home in a developed country is likely to have only four general-purpose microprocessors but around three dozen microcontrollers. A typical mid-range automobile has as many as 30 or more microcontrollers. They can also be found in many electrical devices such as washing machines, microwave ovens, and telephones.
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