Recent content by CPW

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    SERVO THROTTLE SIGNAL

    Maybe this is a little late since you seem to have already figured out what you want to know, but maybe I can help you a little bit. This does not apply to airplanes, since airplanes don't go backwards, but many electric radio controlled cars do go backwards. I am unsure if this applies to ones...
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    Anyone know of a nice USB wireless mini camera...

    I'm looking for a little wireless camera. Here's what I need it to have/do: -Color -Digital -2.4 or 5.8 Ghz (not completely necessary, but it would be nice) -USB receiver (sends video to computer via USB port) -Powered by 5V (9V would be fine also, but I would prefer 5V) -Fairly decent quality...
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    Question about triggering transistors

    That's what I thought. After I posted, I tried using a return wire and it seemed to work. However, something strange is happening. In my project I'm working on, I basically have a custom made USB device controlling transistors. I tried using the return wire, but it wasn't working correctly. So I...
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    Question about triggering transistors

    I have never been able to get a clear answer on this. Can I use a separate power source to trigger a transistor. By this I mean a positive voltage from a source other than the circuit the transistor is in. The ONLY connection from the separate power source to the circuit with the transistor...
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    What RF trancievers will work...?

    Ok, I see know. This is beginning to make more sense. I still couldn't figure out what parts to use all by myself, but now I have a better understanding of what the parts are for. Thank you so much for helping me understand more.  ;D
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    What RF trancievers will work...?

    Thats ok, I didn't expect you to know everything about it. I just need some help learning, piece by piece. So most (or all) of the capictors are there to lower impedance? That makes a little more sense now. Just a few more questions. What is the purpose of the crystal? I kind of understand...
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    What RF trancievers will work...?

    I guess I was getting things mixed up because I didn't actually look at the schematic while I was explaining, I was just going by memory. But yes, that is the schematic I was talking about. I understand what a 16mhz crystal is and how to identify it, I was just asking how I know what value of...
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    What RF trancievers will work...?

    Ok, thanks. That's what I wanted to know. I have a few more questions. The datasheet says to use a resistor to ground the "ground" pin of the chip. What is the purpose of this resistor and how would I determine the value of it? The datasheet's example schematic also shows that you should use...
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    What RF trancievers will work...?

    I know about the length of the antenna already, and that is no problem. The antenna will be hooked directly to the board, so there will be no cable going from the board to the antenna. My question is though, for the antenna, will my thin metal wire antenna that is already on the car work ok...
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    What RF trancievers will work...?

    The transmitter's antenna will definetely be vertical. As for the receiver, the metal antenna is vertical, so if I could use that, things would work well. Otherwise I could just use a wire and somehow make that stand up. Whatever I do, both the antenna on the transmitter and the one on the...
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    What RF trancievers will work...?

    That's ok. I was planning on that anyway. I figured I would just send the values as numbers (from 0 to 255?) and then convert them back to the right pulse width at the end. It shouldn't be that hard, so I'm not worried about it. Now all I need to do is wait until they get those in stock. One...
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    What RF trancievers will work...?

    I was thinking of using this to "upgrade" a radio-controlled car with a better radio system for fun. It uses interchangeable crystals in the 27 mhz range, so that's why I said I wanted that. However, after looking into it, I decided it might be wiser to go with 2.4 ghz, as that seems to be the...
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    What RF trancievers will work...?

    What I need for my project is some simple RF transcievers. Here is a list of the things they need to have/do: -Crystal socket for XTAL crystals in the 27 mhz range -4 simple pins/connections: positive, negative, data to send, data received -Place to solder antenna to (obviously) -Small (2x2...
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    Local Positioning System (I need some help)

    Sorry about reviving such an old topic, but I just became interested in this again and would like to continue working on it. I find some ultrasonic transducers here: http://www.sparkfun.com/commerce/product_info.php?products_id=253. Will these work? The are just under an inch in diameter, so...
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    Local Positioning System (I need some help)

    Thanks for the idea. I'll keep that in mind, but I'm going for the easiest way, so if the ultrasonic way works, I will probably go with that. I'm open for all suggestions and ideas, though.
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