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USB port can be used as power source
The microcontroller chip itself costs almost $10 (for higher end ones), and the board costs a few $s, so you probably won't get much cheaper than $30. They really aren't making much .
QuoteUSB port can be used as power sourceWill this also power the Stepper motors? USB port power is limited.
Here is one that kicks a bit more butt, 100 pins and 80MHz clockA bit more of the features: USB 2.0 On-The-Go Peripheral Dedicated DMA Channel for USB OTG 512K Flash (plus 12K boot Flash) 32K RAM (can execute from RAM) 4 Channel Hardware DMA Controller Flash prefetch module with 256 Byte cache Lock instructions or data in cache for fast access Programmable vector interrupt controller Fast and Accurate 16 channel 10-bit ADC, Max 1 Mega sample per second at +/- 1LSB, conversion available during SLEEP & IDLE 2 wire programming and debugging interface JTAG interface supporting Programming, Debugging and Boundary scan Fail-Safe Clock Monitor – allows safe shutdown if clock fails 2 Internal oscillators (8MHz & 31KHz) Hardware RTCC (Real-Time Clock and Calendar with Alarms) 2 x SPI, 2 x IICAnd loads more.One off price $7.59Damn it must sucks to be married to Atmel
Hi,Quote from: cyberfish on April 10, 2010, 11:39:51 PMThe microcontroller chip itself costs almost $10 (for higher end ones), and the board costs a few $s, so you probably won't get much cheaper than $30. They really aren't making much .Gee, is AVRs really that expensive??This is just one out of a vast range of PIC processors which would be much more than it takes to control two steppers and it's $1.56 in PDIP in one off. Much less could do it (like the trusty 12F675 at $1.10), but this was just a random pick.Here is one that kicks a bit more butt, 100 pins and 80MHz clockA bit more of the features: USB 2.0 On-The-Go Peripheral Dedicated DMA Channel for USB OTG 512K Flash (plus 12K boot Flash) 32K RAM (can execute from RAM) 4 Channel Hardware DMA Controller Flash prefetch module with 256 Byte cache Lock instructions or data in cache for fast access Programmable vector interrupt controller Fast and Accurate 16 channel 10-bit ADC, Max 1 Mega sample per second at +/- 1LSB, conversion available during SLEEP & IDLE 2 wire programming and debugging interface JTAG interface supporting Programming, Debugging and Boundary scan Fail-Safe Clock Monitor – allows safe shutdown if clock fails 2 Internal oscillators (8MHz & 31KHz) Hardware RTCC (Real-Time Clock and Calendar with Alarms) 2 x SPI, 2 x IICAnd loads more.One off price $7.59Damn it must sucks to be married to Atmel
The 32-bit AVRs have similar features at a similar price. (but yea, I'm married to Atmel definitely)
The 32-bit AVRs have similar features at a similar price.
Do they have a good, open source C compiler now? :p
Hi,Quote from: waltr on April 11, 2010, 01:01:09 PMQuoteUSB port can be used as power sourceWill this also power the Stepper motors? USB port power is limited.If you've got some really tiny ones perhaps, but in general no.What exactly are you making, with what model motors and what is it intended for?Controlling two steppers is not a big job, but I assume it should be controlled in response to some outer activity or conditions.You get better advice when you give us all the gory details.