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Recent content by rchadwick

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    Fluke 93 Scopemeter schematics

    fluke 93 I'm in the same boat.. Not sure about yours, but on mine, there's a big 10V cap, which I suspect is for the main 5V supply. The PS squeals, and the cap never gets over about 2.5 volts. I have this ugly feeling that some custom Fluke IC is shorted internally, but I haven't noticed...
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    PIC BASIC PLUS now support 32bit math

    Picbasic... After all this time, I'm still confused... MELABS sells Picbasic and Picbasic Pro. Crownhill sells Picbasic Plus, and something else (Don't remember). They seem to have different names, different features, and different version numbers. I assume they are different products. Yet...
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    Car computer interface - ISAT or TECH II

    Car Computer Also, I believe Circuit Cellar did an article on this within the past year.
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    Practical Robot design - where to begin?

    Robots It sounds more like you want to make a machine to stuff PC Boards. When you mention robots to a bunch of hobbyiests like us, we think of usually-impractical robots that wander around on their own. Machine vision systems for these robots is also geared towards tracking a red ball, or...
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    Molecule/ion simulation software

    ion simulation This isn't exactly RF, but does anyone know of software that could simulate, say, the motion of negative ions coming out of one of those air purifiers?
  6. R

    how can I make an IR tx/rx to connect it to PC mainboard?

    RF Network If you're looking for very easy, and aren't too concerned about the price, Maxstream has some really nice RF modems. Fairly high baud rate, good range, and pretty small too. And onboard firmware handles all the tough stuff for you.
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    Is it possible to connect Pic directly to usb

    USB I believe some of the newer PIC chips, I think the 18F series, has a built in USB port.
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    CHEAP hardware only IRDA needed

    CHEAP IRDA I've seen some of the chips by HP and Maxim that turns IRDA, at the hardware level, into something a serial port can understand. Does anyone know of a real cheap solution to do HArdware-only IRDA? I don't need any of the protocols...
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    wireless network - I need some help

    Wireless network If you don't need extreme speed, you could use one of those OEM RF Transciever modules, like the ones at Linx and Laipac. Of course, you have to figure out the networking protocols yourself, and you'll have to use some kind of encoding for reliability, like Manchester. If money...
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    [NEED HELP] ABOUT USE IrDA OF PDA

    Which PDA? Software is available for both Palm, and some Windows CE machines.
  11. R

    Best Schematic Capture/PCB combo

    best schematic capture I've used OrCad, Protel, and Multisim. I was thinking of trying Multisim and Ultiboard, but was wondering what experience others have had. I'm looking for something that has a big parts database, is easy to use, and doesn't crash every 15 minutes. Is Multisim/Ultiboard a...
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    What's the LM3909 replacement?

    Since the LM3909 low-power LED Blinker isn't in production anymore, does anyone have some schematics of low power LED flashers?
  13. R

    Where can I get the Multisim 2001 SP2 ?

    multisim 2001 software I hate to be a 'me too' type, but I'm also looking for Service Pack 2. Anyone? / Warning #1 - No me too's! /
  14. R

    PIC Bootloader with Protection bit enabled.

    It looks good, but... I thought it was pretty much what I wanted, but then I noticed it was for the 18F series. Almost! I'm using the 16F8XX series. Know of any for that series?
  15. R

    PIC Bootloader with Protection bit enabled.

    That's what I've heard... But all the bootloaders I've found say they don't work with the protection bit set. Anyone know of a bootloader that works with the protection bit?

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