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  1. CDRIVE

    Flashing 5watt led?

    This is how I light my and my wifes bike. As you will soon see I've built in backup redundancy. First up is the headlight and taillight combo set that I bought with my bike. They run off button bats so I use them sparingly. They're surpisingly very bright...
  2. CDRIVE

    Flashing 5watt led?

    Before you go any further and I do mean any, I have to tell you that you're being totally unrealistic about your design desires. You want to power two 1A LEDs = 2A and you want to do it with a puny 9V battery. This level of power consumption is impractical for bicycle lighting unless you're...
  3. CDRIVE

    Flashing 5watt led?

    If you're referring to a little 9V battery forget it. It ain't happening. Btw, I'm currently modifying a Serfas tail light to operate as a brake light. Also, where are you getting this $300.00 figure for a bike tail light???? :eek: I'm heading out now but you can mull over this schematic...
  4. CDRIVE

    Flashing 5watt led?

    Please describe the use function for your project. Chris
  5. CDRIVE

    Laser module question

    I suspect it has an integral limiting resistor valued to operate the laser on 5V. I'm not sure that this question belongs in this sticky though. Chris
  6. CDRIVE

    Flashing 5watt led?

    As I stated in my last post: If your LED is going to operate at over 200mA you'll need a driver. What current level will this LED operate at? What will your power source be and what operating voltage? If I find time I'll draw it for you. In the interim try Googling "High Power 555 LED Driver"...
  7. CDRIVE

    Flashing 5watt led?

    I'm not sure what you're asking but there are varied versions of the 555. An LM555 by National Semiconductor specs source and sink output @ 200mA Max. If you need more drive current you can have the 555 drive the base of a BJT or the gate of a MOSFET. Chris
  8. CDRIVE

    Flashing 5watt led?

    It's a surface mount but the soldering tabs are easily accessible and it's 8mm, which is easier to handle. Chris
  9. CDRIVE

    Flashing 5watt led?

    Surface mount components typically don't employ wire leads that feed through PCB holes to be soldered on the bottom side of the board, They require superior soldering skills, as the typical soldering iron tip can be larger than the entire component. They're soldered to the component side of the...
  10. CDRIVE

    Frequency and Voltage change for elektromotor

    I'd like to add that I've never seen 3PH motor specs like this.... Ever. Are these separate taps for each voltage range? If so, that's a heck of a lot of taps or wires! :eek: What's the HP of this motor? Chris Edit: I'm referring to the freq specs that change with operating voltage.
  11. CDRIVE

    Frequency and Voltage change for elektromotor

    I wasn't suggesting building one. http://www.automationdirect.com/adc/Overview/Catalog/Drives;jsessionid=5e304bb3854bb7cf2b0b1c15307b525d7b26 Chris
  12. CDRIVE

    Battery Operated Light

    Sorry about that Harald. TOO = Theory Of Operation. Chris
  13. CDRIVE

    Battery Operated Light

    Yes, we call it a 'Transformer'. :D In this case a 'Toroidal Transformer'. ;) Chris
  14. CDRIVE

    Battery Operated Light

    Harald, it appears that you were correct. No connection to the Solar Engine circuit at all. BTW; nice TOO of his two circuits. Chris
  15. CDRIVE

    Frequency and Voltage change for elektromotor

    Capacitive phase converters, as you describe, were once popular for HSM's but low cost 120V and 240V VFD's have all but supplanted them. The device you describe provides poor locked rotor torque and run torque isn't stellar either. A modern VFD can make a 3PH motor do all kinds of tricks. Brake...
  16. CDRIVE

    Get a led working

    Ha, I assumed everyone knew what it is but me! Chris
  17. CDRIVE

    Flashing 5watt led?

    For just about anything electronic. http://www.digikey.com/ Chris
  18. CDRIVE

    Flashing 5watt led?

    Keep in mind that white LEDs can require an operating voltage more than twice that of a red LED. With this in mind a direct battery source to power either will necessarily waste battery power when used with red LEDs. If you pick one or the other we can design the battery voltage for minimum...
  19. CDRIVE

    Design of AM receiver 195kHz to 400kHz

    I found this an enjoyable read and a well thought out design. http://www.qsl.net/ko6bb/files/ml-rx.pdf Chris
  20. CDRIVE

    Battery Operated Light

    Harald, he may be referring to this ... https://www.electronicspoint.com/easter-engine-problem-t251737p2.html#post1489892 Chris
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