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  1. GPG

    Led fast past flasher

    Suuply? battery?
  2. GPG

    RF receiver circuit

    What frequencies are you dealing with How about a bock diagram
  3. GPG

    Homemade DC generator(dynamo) with a spinning coil

    Or two in antiparrallel if the output current is ac, field limited which seems likely
  4. GPG

    Homemade DC generator(dynamo) with a spinning coil

    First thing I thought when starting to read If junk counts as a household item (it does here) then you're halfway there
  5. GPG

    Light sensing with BPW34, TL074, and Arduino

    Specced for 5V single supply.But there are quite a few to choose from http://www.linear.com/docs/16159
  6. GPG

    mod an atx supply with the at2005 chip.

    The pt pin-says lower than .6v or above 1.2v protection of under/over voltage is activated. Its biased internally so I took a shot that floating it would work I still don't know what the result is/was
  7. GPG

    Light sensing with BPW34, TL074, and Arduino

    You will likely need a CMOS amp like this. http://www.linear.com/docs/16998
  8. GPG

    Help with open collector output

    Misread. I see no reason not to drive the motor directly if the stall current is within limits. Or if running a 12V motor using a common supply
  9. GPG

    Help with open collector output

    The out put is rated for 4A max. What current does the motor draw? You may not need a relay. Are you using the 12V for supply to the receiver.
  10. GPG

    Help with open collector output

    Have you got a link to the receiver data?
  11. GPG

    pressure measuring device

    A lot of load cells have a resistor on the tension side and the compression side for 1/2 bridge operation. The benefit is temperature is less an effect
  12. GPG

    pressure measuring device

    A man standing (or sitting for that matter) is not a pressure, . Pressure is force/area eg PSI. Kg/M, Kpascals
  13. GPG

    KS115SR hydraulic excavator (governor motor issues)

    If the motor is not working it cant find the index.There are manuals available on line
  14. GPG

    Digital voltmeter - 500m cable

    common mode choke will reduce the noise.if its a problem. Are all the signals from the same site ie only one cable? A lot more info reqd
  15. GPG

    Coil replacement

    http://hyperphysics.phy-astr.gsu.edu/hbase/electric/rlcparc.html Do the calcs for a capacitor value for the replacement coil. Though with higher resistance the Q will be lower and may prevent operation..
  16. GPG

    Need help with identifying this type of connection...

    Also known as lucar connectors. https://en.wikipedia.org/wiki/Lucar
  17. GPG

    mod an atx supply with the at2005 chip.

    Floating means no connection.
  18. GPG

    14040 Counter help please

    ^ so Q8 stays high till Q4 goes high giving a stable pulse out on Q8. Aside it reminds me of delving into the guts of a VIC20 many years ago to make it into an event timer.However the NMI was being used for keyboard scan and other housekeeping ( at 50Hz, mains derived) so I had to hijack the NMI...
  19. GPG

    Circuit to hold accessories on after ignition is switched off

  20. GPG

    Activate transistor with piezo disc

    Ground the emitter and put the LED in the collector circuit. Put the diode between base and ground, anode to ground.
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