Recent content by andrewpro

So I was poking around sparkfun electronics website and found these new NTSC/PAL modules (well..new to them). This first one: <A href='http://www.sparkfun.com/commerce/product_info.php?products_id=749' Target=_Blank>External Web Link</a> Is $33.95 US, will display 6 lines of 16 characters...

Someone posted this in another forum I frequent and I just thought I'd pass it on here as it it seems kinda cool. It's not the fastest thing in the world, but seems well suited to picaxe speeds. <A href='http://www.xs4all.nl/~jwasys/old/diy2.html' Target=_Blank>External Web Link</a> You could...

Ok, so. I've been playing around with a design for a doohickey I've been working on, and decided that an external interface for MMC cards was prudent. My question ot you guys: How muhc interest would there be if I tailored a version to fit with picaxes? It would be UART interfaced, and...

In the thread entitled &quot;toggle question&quot;, the replies by YLP and beaniebots got me thinking... Which would use less program space? Setting gosubs to 16, then not using them, or using gosubs. Like this: start: Goto othersub othersub: goto start OR........ Start: Gosub othersub...

I always see alot of talk of MOSFETS and drivers and all kindsa things on the boards here, and wanted to share an experience I had/am having. I was never one ot really buy into Insulated Gate Bipolar Transistors because Iw as content with power mosfets and drivers, etc. I recently came into...

Ok, I'm at odds here. I'm building a radio telescope (a few different ones for different purposes actually) and I'm going to use an 18X to do most of the controlling. The high speed readings are going to be done over a parallel interface not involving the picaxe, but for slower (much slower)...

I was toying with the idea of making a picaxe talk to my TI graphing calc, and found this on the web. Interesting to anyone who has thought of this before... <A href='http://www.ticalc.org/archives/files/fileinfo/366/36697.html' Target=_Blank>External Web Link</a> --Andy P

Not entirely picaxe related, but the PWM would come from one so... Has anyone, or does anyone just plain know, used a PWM signal to control the temperature of a peltier junction? My radio telescope DC processor (If I ever finish it! It's in redesign number 7) needs temperature control. The...

Sheesh. I hope this isn't considered spam considering the number of times I keep posting updates. I'll try to keep em all in this thread from now on I hope... Added an article on starting from scratch with the picaxe, and one for SPI itnerfacing with a picaxe. They're both linked ot the main...

For those interested, I wrote up a webpage on my findings related to overclocking and underclocking the I2C bus with Picaxe's. You can get a direct link here: <A href='http://research.plistin.com/picaxe/overclocki2c.html' Target=_Blank>External Web Link</a> or to the main page here: <A...

Just as a heads up, I linked to your guys pages from my newly created main picaxe page, located here: <A href='http://research.plistin.com/picaxe/' Target=_Blank>External Web Link</a> If it's not OK, let me know and I'll remove the links. Also, to anyone else with a picaxe based...

There has been alot going around on the board lately about the MCP23016 and other IO expanders. A note to anyone who is, or desires to use microchips MCP23016 IO expanders... Dont bother. Not for new designs anyways. As I said in my previous post about overclocking the I2C, I've been playing...

Sorry for the little ascii emoticon in the title, but I coudln't help myself. Two things first: My O-scope is out of calibration, but for this instance it doens't matter as I dont technically need it for anything other than a relative reference. I dont know if my picaxe is actually running at...

As the title says, I'm only getting the first chip (address 0) to work in a string of 6 24xx512 eeproms (3 are 24AA512 and 3 are 24LC512). I've used up to two before without any problems, but now that I've got all 6 together I can only access address 0 (10100000). I can write and read fine...

I have a few 24fc512 i2c eeproms from microchip that are capable of 1mhz communication speed. I was thinkin that if I was running at 8 mhz instead of 4, and dind't use the appropriate i2cslave speed keyword, would it in essence overclock the i2c comms as well? I.E. using just i2cfast instead...