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  1. CDRIVE

    help with picaxe

    No, the collector current remains in phase with the base current. It's the collector voltage that's 180 deg out of phase with the base voltage. Chris
  2. CDRIVE

    help with picaxe

    Well I think I've caught up on some of my own projects. This gives me some time to answer your last reply. Actually, this post isn't necessarily exclusively for you. It's intended more for any nubes,... electronics or uC. Why I didn't recommend Emitter Follower Drivers for use with uC's ...
  3. CDRIVE

    Which PicBasic Software To Use?

    Were you "Logged On" as Administrator when you installed them? I don't have to save anything to throw these errors. Two of them are generated immediately when running it. As I said though, all is well if I run it as administrator. There were no errors or untypical windows messages, warnings...
  4. CDRIVE

    help with picaxe

    I don't see your issue with PNP's or for NPN - Common Collector configuration. Both will work to drive the common cathode bi-leds but the PNP will require a change in the PWM code. The common collector NPN can't drive your led string though. See your reply in bold. :confused: Yes, I'm...
  5. CDRIVE

    Which PicBasic Software To Use?

    Forget what I said about continuing with this odyssey. I changed the permissions in MBP's properties to "Run As Administrator". Now I can left click on it and only deal with the "Do you want to run this file?" windows prompt. I can live with that for now. I want to spend my time familiarizing...
  6. CDRIVE

    help with picaxe

    This getting confusing. If you get common anode bi-leds you would drive them with an NPN or the FETs you have. Your code would remain unchanged too! Maybe it's just me. I'll admit that I haven't had a fun week! I've been in one of those "Computer Hell" vortexes. This thread doesn't help...
  7. CDRIVE

    help with picaxe

    Yes, but not with a MOSFET. What you're describing is an Emitter Follower also called a Common Collector amplifier. The down side of emitter followers, besides the higher base voltage needed, is they can't be saturated. For this application this is not a big deal but becomes an issue when...
  8. CDRIVE

    Which PicBasic Software To Use?

    Ha, that requires a digressive answer. Writing programs with it? Not quite. Playing with it and modifying existing examples.. yes. This may put you to sleep but here's the whole extremely complicated and convoluted picture, sequenced in the order of events. However, even this is condensed...
  9. CDRIVE

    help with picaxe

    You do realize that you can purchase 4 lead Bi-LEDs don't you? 4 pin packages don't have the anodes or cathodes committed to a common pin. They're more versatile than common cathode or common anode. On the other hand common anode packages aren't hard to find. Ebay BiLed Listings Common...
  10. CDRIVE

    help with picaxe

    I'll sketch up a PNP driver for you. Your LED current is minimal, so just about any PNP will drive your common cathode bi-leds. Save you're high power FETs for another project. They're overkill in this application anyway. FYI, all uC's have a maximum accumulative current rating. The Picaxe will...
  11. CDRIVE

    The Ultimate Tube RIAA-Amplifier?

    Just a note here. Living in a subtropical climate I've used many things on my shop machinery to ward off rust. I've used both WD40 and LPS-2 to spray them down. Once, when one of my lathes sat unused for an extended period I was shocked to find that either the WD-40 or the LPS-2 had stuck the...
  12. CDRIVE

    help with picaxe

    Robert, I didn't mention P-CH FETs because they're not as common as N-CH. I figured that logic level P-CH's would be near none existent. These days things change rapidly. So, after a search I found plenty of hits for "logic level p channel mosfet". Chris
  13. CDRIVE

    help with picaxe

    You may have posted it earlier but I don't feel like searching for it. What's the current level of your LEDs? How many (parallel strings) will be driven by each FET? This information well help us suggest the best solution because common cathode bi-leds are not ideal for driving them in the...
  14. CDRIVE

    help with picaxe

    Sorry. but my brain is fried on oxycodone. I threw my back out again. They haven't done a damn thing to help me stand erect or ease the pain though! I need more beer to wash it down. Happy New Year! Chris
  15. CDRIVE

    help with picaxe

    Every "If" statement must be terminated with an 'EndIf" statement. This is where code indentation makes code easier to read. If you look at my first "If" statement (If A) and follow the column straight down you will see its terminating "EndIf" statement (EndIf A). Now look at my second 'If"...
  16. CDRIVE

    The Ultimate Tube RIAA-Amplifier?

    WD40 is not recognized as an acceptable electronics cleaner. That said I've used it and it's very effective. As WD40 dries over time it becomes tacky though. In fact I've seen it stick metal surfaces together like they were epoxied! So, if you use it I would recommend periodic reapplication or...
  17. CDRIVE

    help with picaxe

    No argument but the Picaxe Interpreter/simulator has to perform the same functions that the chip would. So whatever functions are flashed in the chip's boot loader has to also be called from the interpreter. Yes, you get it now! That's why I changed the PwmOut duty cycle to 0. It prevents...
  18. CDRIVE

    The Ultimate Tube RIAA-Amplifier?

    Is it only me that finds an Analog/CRT scope pleasing to the eye? ;) Chris
  19. CDRIVE

    help with picaxe

    Okay Robert, here's my attempt to explain the "PwmOut" command/function. First you'll note that I called it a Command/Function. Some might argue that it's technically a Function only. Functions are comprised of the function name (PwmOut) followed by variables or constants called "Arguments"...
  20. CDRIVE

    The Ultimate Tube RIAA-Amplifier?

    Well, that's enlightening. Thanks, Chris
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