Search results

Search Forums New Posts
  1. Arouse1973

    LED bags

    Oh no black blob syndrome. under that black blob is an IC what it does is anyones guess. Adam
  2. Arouse1973

    Lights when audio is triggered

    Yes your right you could use an amplifier for this or my origional circuit using a comparator instead of the transistor. Or if you can program use the AtoD of the Arduino. Adam
  3. Arouse1973

    Need Help with auto switching Reverse Polarity Circuit

    Ok sorry misunderstood what you meant. Thought you had invented something there :) Adam
  4. Arouse1973

    Need Help with auto switching Reverse Polarity Circuit

    This might work ok, as mentioned above the use of a relay. The timer circuit could be a 555 but I am not familiar with that device. Adam
  5. Arouse1973

    Need Help with auto switching Reverse Polarity Circuit

    How do you get a +/- 27 Volt split supply from 3 x 9 Volt batteries? Does the OP mean he just wants to reverse the polarity and hence direction of current? Thanks Adam
  6. Arouse1973

    How to use a fs1000a transceiver set

    This is how these devices work because they are on the ISM band. You need to be able to distinguish between other device which is why you send a unique packet of data. You can't just send an RF carrier wave and expect it to work because of other devices using the same frequency, your receiver...
  7. Arouse1973

    Hello Steve and All,

    Hi Rod, welcome! Adam
  8. Arouse1973

    Clearing doubts on grounding electronics circuitry

    Yes as I first thought! Jimbo are you now happy with how return paths work or would you like some examples to help you understand? Adam
  9. Arouse1973

    LED bags

    Freezer spray is what I use, it goes brittle and you can pick it off. But use with care and small amounts at a time. Adam
  10. Arouse1973

    GSM and PIC help please

    What are you confused about? A bit more details would be good! Adam
  11. Arouse1973

    Clearing doubts on grounding electronics circuitry

    Yes differential signalling can use the other wire in the pair as a return, as all signals must have a return path. I think what Jimbo was talking about was serial data from say a UART on the ECU which was going to a UART on the UNO. Either way unless isolated the signal will only have one way...
  12. Arouse1973

    Clearing doubts on grounding electronics circuitry

    In your first example yes, but the second answer no and I gave you the reason why. Sorry if I confused you. I did say: "The signal energy and power supply energy must both have a return path to complete the circuit" and not "The signal energy and power supply energy must both have the same...
  13. Arouse1973

    Hall effect part suggestions?

    You should be using the A1104 device as a replacement for the now obsolete A3144. The A1104 has a single NMOS output transistor as an open drain. This sensor is not a latch type as it has a BRP (release point). The A3144 has a BJT output stage instead of a NMOS and a BRP so this device is not a...
  14. Arouse1973

    Clearing doubts on grounding electronics circuitry

    Hello Jimbo. Jimbo said: "Now based on my understanding the reason I was not receiving the data in the first instance was because my computer did not have a common ground with ECU. Am I correct?" Yes you are correct.The signal energy and power supply energy must both have a return path to...
  15. Arouse1973

    Designing a Time Delayed Relay

    No Probs, I have all the relevant standards for the UK. LVD, vehicle directive, machinery directive, generic standards and all the emission and immunity standards and also R&TTI, which you have to purchase for the latest copy,so if you want to know anything then I can easily look it up for you...
  16. Arouse1973

    Static Electricity Generator (need some help)

    It only takes a few hundred milliamps of current at DC and even less for AC to cause fibrillation of the heart, this is very dangerous and I suggest this is closed.
  17. Arouse1973

    Designing a Time Delayed Relay

    I think Kris has covered this well. I have done a bit on mains and LVD (low voltage directive). In the UK you need to make sure the wire has the correct current rating for the length you are using to prevent excessive heating and voltage drop. The fuse needs to be rated with respect to the...
  18. Arouse1973

    Newbie with a power supply question

    Here is an example I have worked out for you. Using a 4 inch steel nail (most nails are made of steel and not iron) wrapped with 50 turns of wires with 1 Amp of current gives roughly the magnetic field of a small bar magnet. Now if you were to use pure iron then that's a different matter this...
  19. Arouse1973

    Bonjour tout le monde!

    LOL Kris , bad puppy now in your bed! and stop chewing my slippers :)
  20. Arouse1973

    Help Identifying a Diode

    Zener diode I think, give us the whole number from around the device. Thanks Adam
Top