Sounds like we could use USB-UART then Analog ports on the microprocessors and dump a buffered data to the serial port. Thank copy that data into excell and...
Andrew, Can you provide pads on the FTDI board which allow us to add a max chip and/or direct UART(0-5v) connection pins. ta, Nick (i also spied some dual uart...
... You would only get a 10's of kilohertz sample rate there. An external flash ADC for $10 and you can have 100Ms/S. (The problem then becomes buffering it) ...
I can't see a great need for a MAX232 chip as well. If you want to connect to an RS232 device then those pre built ones like you guys already have are cheaper....
... A decent ADC is never the problem :) As Andrew noted, buffering is the big problem. You could brew up some dual ported ram using buffers and hardware...
Brett Lymn
blymn@...
Aug 2, 2007 4:00 am
692
Them's sounds like fighin' words! :) ... From: Brett Lymn [mailto:blymn@...] Sent: Thursday, 2 August 2007 2:00 PM To: robot_sig@yahoogroups.com ...
... A FPGA or CPLD into a fast static RAM or two can give you 100MS and cost ~20. If you where making ONE then I am on Bretts side in saying not worth it. But...
... I was thinking more of the cost of the ram ... you are going to have to trade off a decent sample depth against pocket depth ;) -- Brett Lymn...
Brett Lymn
blymn@...
Aug 2, 2007 6:42 am
695
... I was assuming $10 for the logic and $10 for the RAM. If you only wanted 512 BYTES sample depth you could get buy with just using the free RAM on an FPGA. ...
... OK - but 32k gives you about 327 microseconds of sample time at 100Ms/s, you have to get an awful lot of those chips to get up to a reasonable sample...
Brett Lymn
blymn@...
Aug 3, 2007 1:03 am
697
... I would never put more than one chip in the thing. I was looking at async chips because you dont need to run them at 100MHz if you are looking at a slower...
Hi Andrew, It's probably a bit late to ask but when are you planning on doing the boards etc. Saturday or Sunday 4th or 5th Morning or Evening. I can't make it...
Hi All, Does anyone know which are the quietest 12cm cast fans from UMart? I have discovered that the most expensive fans are not the quietest! Thanks Josh...
Sunday was the plan. I wont be ready to do it Sat. Can do it next weekend or some time during the week if that suits better. There was one other person that...
Hi Andrew and All, It's no go for me this weekend but I'd like to come along learn and assist next weekend if possible. What about Sunday the 12th 10am. ...
OK. Sunday the 12th. I only have 2 FT232 chips on hand. So i will either need to order some, only make 2 or people fend for themselves. I can show paul and...
I'm running DB9 serial ports so I've hooked up a max232 so I won't need a FT232 board I don't think. BTW what is a good safe source of UV that I can use to...
... The chips are 4-5$ USD depending where you get them. The plugs will be another couple of dollars and it cost about $5 or $10 for a PCB but that will make ...
... Yep Bunnings have BLB fluro tubes. They are perfect wavelength for the PCBs You could shop around and find them a fair bit cheaper than bunnings though ...
http://tech.groups.yahoo.com/group/robot_sig/files/ Seams like neither Yahoo Mail or Hotmail will accept the partial zip file emails, so i've taken your advice...
I have a fair amount of stuff I want to get from digikey (including the new ATmega164!). If anyone else wants to put in we should have a decent order pretty...
Hi All, I just got my IR/White-Line sensors working last night. I had to use the full 10 bit ADC to get enought resolution. On the ADC (int values) 0 = Full IR...
Hi All, Here is the code I was talking about. It doesn't make everything go however it shows how to initialise the timers, ADC, UART, interrupts, etc, enough...
Hi Guys, With the recent talk of DCO's I figured now would be a good time to ask, What do people recommend as to a good DCO? Some things to consider - Mostly...
http://www.owon.com.au/pds5022s.html Is a 25Mhz scope with 100Ms/S for <900$ AUD. (Have seen them for $330USD so go figure that exchange rate) It connects to...
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