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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by Ricardo

  1. R

    Data transfer from microcontroller to PC ?

    Yeh, I just noticed your previous post. There's tons of examples and info on Google.
  2. R

    Data transfer from microcontroller to PC ?

    I think most folks use the serial port. It's pretty easy, basically just a MAX232 or similar chip talking to a microcontroller serial line. There are diagrams in the application notes for most microcontrollers, or check Motorola's site. If you get keen you could use a Lantronix XPort instead...
  3. R

    Building an Electric Go-Kart

    I'd investigate some of the existing EV and "electrathon" work. You've got a lot of flexibility, and if you nail down your other performance requirements you shouldn't have any trouble finding components to do the job. Eg, acceleration, battery life. This isn't my area of expertise at all, but...
  4. R

    Mp3 Player AMP?

    Re: I have everything else.. The mobo has regular AC97 audio and a stereo audio socket. I'd be tempted to make life easy, and just go and buy a regular car audio amp. You can run the speaker out to the amp no problem at all... you just need a stereo mini-phono to RCA cable. Edit: If you...
  5. R

    12VDC to 12VAC

    OK, so I've figured out basic sine-wave inversion of 12V DC to 12V AC. Now I need to know the best way to pulse control an AC driven solenoid. Does PWM from on the DC side of the inverter work OK, or is there a better way of doing this?
  6. R

    AUTO ELECTRONICS: Reduce fuel useage, save money!

    There's some funny ones out there. I just read one where someone patented cremation by atmospheric re-entry. Really. But that one above seems easy to construct and prove or disprove. Surely the Patent Office requested a demo?
  7. R

    Cool Car Projects

    PC CANbus controllers seem expensive (at least the ones I've seen anyway) but CANbus enabled MCUs aren't, so maybe PC->Serial/Parallel Port->MCU->CANBus would work ok? Might be interesting producing suitable code for the MCU, but it's a pretty good setup for inside a car. If it's late-model and...
  8. R

    12VDC to 12VAC

    Nobody's got links to suitable info / tutorials / designs? I'm sure it must be out there, but my Google skills seem to be lacking... FWIW, it's going to be part of an nitrous oxide system, so any help with it is appreciated. The design will be posted online as a controller complement to the info...
  9. R

    AUTO ELECTRONICS: Reduce fuel useage, save money!

    Sorry, but your points are wrong. Yes, N2O works partially by adding O2, but also by cooling the mixture therefore making it denser. I won't get into the "blowing your engine" argument, but let's just say that what you've written is not entirely accurate. Better than igniting 1 cup of liquid...
  10. R

    AUTO ELECTRONICS: Reduce fuel useage, save money!

    Nope, those are actual patents.
  11. R

    AUTO ELECTRONICS: Reduce fuel useage, save money!

    The patent office seemed to believe him... 4,389,981 4,421,474 4,613,304 5,293,857
  12. R

    12VDC to 12VAC

    That's odd, because here's what's on the spec sheet: Pressure range 50 Hz from 0 bar (0 PSI) to 70 bar (1015 PSI) Pressure range 60 Hz from 0 bar (0 PSI) to 70 bar (1015 PSI) Pressure range DC from 0 bar (0 PSI) to 50 bar (725 PSI) It'll be on a nitrous oxide line with a bottle pressure up...
  13. R

    Cool Car Projects

    I'd suggest going with a Mini-ITX PC for that setup. Use high-brightness LEDs for the fin - LCD will be really hard for others to read. You can get reasonably priced touchscreens if you look hard enough. I got my "OEM" one from http://www.touchwindow.com and screens are available from various...
  14. R

    12VDC to 12VAC

    Hi there, I'm looking for a circuit design to convert 12V DC into 12V AC, at 50Hz or 60Hz. This is to control a solenoid rated at 12V 50Hz AC, and 8W. As it turns out, the solenoids I plan to use are rated for a higher pressure under 12 AC control than 12 DC, so that's the reason for going...
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