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  1. CDRIVE

    help with picaxe

    Before I begin I want apologize to you. My first replies to you were smug and elitist. I hate that, so I don't know why I did it. Just a cranky old fart I guess. Yowza! That's a honker! It will do just fine with plenty of power dissipation to spare. This is the spec that relates to it being...
  2. CDRIVE

    photovoltaic panel load problem

    Voltage breakover or breakdown is a 'Maximum Voltage' device spec. When it's exceeded the device fails and typically does not recover. Since it was a mystery to you I'll assume that a solar cell will not fail if unloaded when receiving maximum light and producing max voltage. You still...
  3. CDRIVE

    help with picaxe

    Here's some additional experimentation results. I added a third parallel task. Each task has its own 'Resume' command but I've rem'd all but the one located in 'Start2'. I've also swapped the rem'd resume on all three of the tasks with exactly the same results. I then unrem'd all of them with no...
  4. CDRIVE

    Making an FM Transmitter

    The odds are that you don't posses a frequency counter, grid or gate dip meter or a scope capable of measuring this. This leaves you with what you have, which is the FM receiver itself. Chris
  5. CDRIVE

    help with picaxe

    Actually, it's not. This is exactly where it belongs. Breaking up a project into multiple topics in multiple sections of the forum just makes people dizzy. Working with uC's encompasses more than just programming. :p One note here.. I'd highly recommend using a plug and play protoboard before...
  6. CDRIVE

    5V Pulse Amplification

    Did you read this? Chris
  7. CDRIVE

    Making an FM Transmitter

    Did you read the description in your link? Chris
  8. CDRIVE

    Relay query

    That's difficult to answer. You alone know what you have there and you alone know what you ordered and are waiting for. The advice we post is based on the information the OP's give us. Currently, we have no schematics, photos, links, model numbers or any of the pertinent data necessary to give...
  9. CDRIVE

    help with picaxe

    You might find this interesting. On a whim I transposed the code from start0 to start1. Low and behold, though the code execution hasn't seemed to change at all, you can now see the code in both start0 & start1 execute in the code window. start0: pause 1000 High 2 pause 1000 Low...
  10. CDRIVE

    help with picaxe

    Yes, you're not imagining what you're seeing. It's obviously executing the code in "start1" despite the fact that you can't see it happening in the code window. The virtual chip panel indicates the pins executing but you don't see the code window branch to "start1". It's been a while since I've...
  11. CDRIVE

    photovoltaic panel load problem

    I don't think that's relevant unless there's something about solar voltaic cells I'm not aware of. Is there a voltage break-over if they're not loaded when receiving max Sun input? Chris
  12. CDRIVE

    power supply for Hess trucks

    Benvenuti a bordo! Chris
  13. CDRIVE

    Relay query

    Firstly: Low = 170mV, High = 300mV is a recipe for erratic operation. That's an awful noise window. There is no logic family on this earth that operates with a window that narrow. Please explain where you're picking off this signal on the receiver. Secondly: We can give you what you need...
  14. CDRIVE

    power supply for Hess trucks

    Yes, all over the US, every single minute that ticks by another tower is discarded for the garbage man. It's a terrible waste of good power supplies! There's copious information on the net describing repurposing them. ;) You have my interest regarding what those lamps draw @ 3V so please post...
  15. CDRIVE

    power supply for Hess trucks

    No, we don't know that. I said that those lamps are drawing healthy current because they use C cells. What that current is @ 3V is unknown. We do know that it's ~ 2A @ 5V though. The best way to determine what the current draw is @ 3V is to place an Ammeter in series with the 3V battery pack...
  16. CDRIVE

    12v ac and 12dc-10a output rectifier circuit

    What is this going to power? Chris
  17. CDRIVE

    power supply for Hess trucks

    That equates to 1.66 * over voltage. Another 340mV would be 2 times overvoltage! The fact that the truck uses C cells indicates that those lamps draw a healthy current @ 3V. It's likely that those lamps are drawing ~2A @ 5V. Chris
  18. CDRIVE

    photovoltaic panel load problem

    Your circuit appears to be a shunt regulator of sorts. The control element seems to be an OpAmp but you didn't list what the OpAmp PN on your print. This circuit, unless I'm misinterpreting it, seems to be using MOSFETs in a linear mode. I don't think they're the best choice for this...
  19. CDRIVE

    power supply for Hess trucks

    If your truck uses 2 C batteries then the lighting system is 3V not 5V. You should be using an adjustable regulator like the LM317. Also, are you saying that your 12V supply trips the breaker by merely powering the 7805? Restated: Is your 7805 output connected to the truck? Chris
  20. CDRIVE

    Simple switch trigger?

    I'm hitting the sack but I wanted to post this before I do so. It's a 2 transistor method to switch your MCU lines low. R1 & R2 are your existing pullup resistors. S1 & S2 are your existing push button switches. This should eliminate the diode drop that you're concerned about. When Q1, Q2...
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