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  1. Fish4Fun

    Ever wonder why Windows has more problems than Mac?

    I am confused, I thought there WAS a god dll :rolleyes: I am certain I have declared it, and I might have even called it :eek: At the end of the day, artists seem to prefer Macs, engineering types prefer linux, the rest of us just use win-blows. hehe. I have never tried Mac. I have...
  2. Fish4Fun

    Help on circuit

    Here is a screen shot of the scope: Blue Trace = Mosfet Gate Green Trace = Vcc Side of L1 Red Trace = AVR Vcc The shot was taken about 6 seconds after the device was turned on, the PWM is @ a bit less than 50%. As you can see (kinda) the inductor is fully saturated ~200uS and releases the...
  3. Fish4Fun

    Help on circuit

    Kris, I was hoping you would take a look :-) 1) Voltage regulation: I considered a zener, but decided to test it w/o on the bread-board. I began with a 10,000uF 63V Cap as C4 (never had any intention of keeping it in the circuit, just wanted to watch the voltage behavior...
  4. Fish4Fun

    Printer for PCB Toner Transfer

    pilko, I have had moderate success with toner transfer, but in the end I find it time consuming and frustrating. Far too often I spend more time "touching up" and "fixing" than I think the PCB is worth. Not trying to hijack your thread, but I am curious if you or others may have tried...
  5. Fish4Fun

    12 V power supply.... Is this normal?

    adityarainmaker, Honestly, why not just order a 5V power supply? I don't mean any disrespect, but you are obviously in over your head and intent on needing a 5V power supply, you should be able to purchase one ready to go for < $5. You almost certainly have one laying around your house in...
  6. Fish4Fun

    Help on circuit

    OK, re-did the PCB for through-hole after breadboard testing with a through-hole.....LOL, Did I mention I am using an ATTINY2313 ? !me Anyway, here is the schematic: Note I added a small inductor, schottky diode and some caps. It will likely work with just the one 0.1uF Decoupling...
  7. Fish4Fun

    Bus Transport system

    lojack ==> http://en.wikipedia.org/wiki/LoJack There are also tons of vehicle monitoring systems already in use by (among others) UPS, FEDEX, USPS, etc, etc. Heck, in my backwoods, nowhere county the school buses all have real-time location tracking with vehicle information already installed...
  8. Fish4Fun

    12 V power supply.... Is this normal?

    because you don't understand how your multimeter works, but you are assuming it is correct regardless. The answers are all above in previous responses. Google should be your friend: http://www.allaboutcircuits.com/vol_3/chpt_3/4.html http://en.wikipedia.org/wiki/Rectifier Fish
  9. Fish4Fun

    micro processing ??

    Look up "comparators". http://www.ebay.com/itm/2-x-LM311-LM311P-IC-Voltage-Comparators-/250857586670?pt=LH_DefaultDomain_0&hash=item3a6846ffee You can configure them to "trip" at virtually any voltage. Fish
  10. Fish4Fun

    PWM controlled DC motor issues

    I assume you mean a commercially produced "butterfly valve", NOT a valve controlled by a "butterfly" ( http://store.atmel.com/PartDetail.aspx?q=p:10500051#tc:description ). Sorry, only in this forum would you need to clarify that. At the risk of being silly, have you contacted the valve MFG...
  11. Fish4Fun

    Power - on security camera

    Hrmm, MadMechanic, maybe I don't understand. All of the security cameras I have are "dumb". That is they don't record anything, they just convert light input to an electronic signal. The signal is then sent to a device (a DVR) that makes all the decisions about what is saved. The DVRs that I...
  12. Fish4Fun

    The Ultimate Transistor Amplifier

    :-) See, now that looks more like an amplifier. Hehe. Now the only question I have left is: Why? Don't get me wrong, I like doing the already done as much as anyone, but there have been Audio amplifiers "on a chip" readily available since the early 1980's. I am not suggesting any of these...
  13. Fish4Fun

    Help on circuit

    First Note: I don't know if anyone noticed that the AVR in the PCB I posted a picture of is an AT90S2313 and NOT an ATTINY2313. I certainly didn't....two days of my life I will never get back, LOL. Second Note: the FDS8449 mosfet worked just fine. Third note: I had to add capacitance and...
  14. Fish4Fun

    I'm serious!

    If you plan to do much soldering, order a temperature controlled soldering/desoldering station. Make sure you heat the copper trace and the pin, touch the solder to the other side of the pin, NOT the soldering iron. Keep your tip clean & well tinned! Use a thin coat of flux on your...
  15. Fish4Fun

    AC Relay/Contactor Powered by DC

    I have, but I don't need speed, and I really like a completely "broken" contact. There will actually be 4 of these "contactors" that control various heating elements in my home brewing setup. It is a wet environment and I want both hot legs completely "broken" when off. These just seem cheap...
  16. Fish4Fun

    AC Relay/Contactor Powered by DC

    Thanks Duke! I knew I wasn't completely crazy :-) FWIW, I need to control some heavy AC current (~25A @ 220Vac) and it appears the best "cheap" relays (technically "contactors") are built for the HVAC industry which uses 24Vac for almost everything. I could certainly add a 24Vac HVAC...
  17. Fish4Fun

    2 Stepper motors in sync

    Hrmm, Try "DC Gear Motor" on ebay. Steppers are going to cost a lot more to use. You should be able to find something for less then $50, perhaps as low as $10 if you don't need too much torque/speed. Fish
  18. Fish4Fun

    Help purchasing the right motors

    Jumbosize, Welcome to the forum. @==> Source of motors? Radio Shack, Ebay, Hobby Shops (online and local) etc. @==> Idea.......prolly really need to re-think your launch system. Sounds cool, but highly improbable it is going to have any degree of accuracy. Engineering is as much about...
  19. Fish4Fun

    AC Relay/Contactor Powered by DC

    AFAIK the only physical difference between an AC relay//Contactor is that a DC relay relies entirely upon the DC resistance in the coil to limit current where as an AC relay/contactor uses the impedance. ^ | | If this is false, then I need someone to set me straight. So, if I have...
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