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Recent content by motoshan

  1. M

    RC toy not working if the transmitter is far away from toy car

    i dont have any experience in circuit debugging.; ( I removed four transistors from board(A) which I mentioned in the question to solder it in another faulty board(B), whose transistors are faulty(i m sure), now that board(B) is working well except it doesnt steer the car towards right. I...
  2. M

    RC toy not working if the transmitter is far away from toy car

  3. M

    RC toy not working if the transmitter is far away from toy car

    I have another toy car receiver board which is working in same frequency range, is it ideal to replace the coil with another one ?
  4. M

    RC toy not working if the transmitter is far away from toy car

    My son hav a cheap RC controlled toy car which was working well. right now the toy car in not working unless I hold the transmitter extremely close to the toy. I had checked the transmitter with another toy car of same frequency(27Mhz) & its working fine . does the toy car lost its designated...
  5. M

    what is this terms stands for? : VL- VL+ etc..

    Perfect.. thanks for the detailed information. Definitely ill choose an assistance for my further steps.
  6. M

    what is this terms stands for? : VL- VL+ etc..

    thanks for the reply, So .. it is not ideal to use a 12v regulator right? how can i test the voltage across these pins, Iam not an Electronic guru, or dont have too much experience with these stuffs. As you said STK407 070B is not available for me, What i had done was used a cheap 60W AMP tat...
  7. M

    what is this terms stands for? : VL- VL+ etc..

    what are these terms stands for? : VL- VL+ etc.. What are these terms stands for? VL+ VL- VH+VH- I found this labels when I opened my 8 year old home theatre. These are labelled near the transformer pcb. Is this a high voltages to drive the power amp (STK 407) of the system.? Can I convert...
  8. M

    Substitute for cep83a3?

    let search for the exact transistor.. not a substitute. thanks
  9. M

    Substitute for cep83a3?

    first of all im not at all an experienced electronics engineer.. hi all... i had a nice firework just before posting this thread :-D... By googling i found that cep83a3 is an N-Channel Enhancement Mode Field Effect Transistor. Again by Googling i found that cep50no6 is also N-Channel...
  10. M

    How to detect a valid connection in a circuit?

    Thanks for the reply.instead of using traditional telephone line im using a mobile phone. I want to detect whether the cable is disconnected or not from the mobile phone
  11. M

    How to detect a valid connection in a circuit?

    Not found any solution yet !!:(
  12. M

    How to detect a valid connection in a circuit?

    Im still waiting ...... . . . .
  13. M

    How to detect a valid connection in a circuit?

    Thanks for the reply, But... Using a 3.5 mm Jack socket wont do the job for me.:( My DTMF circuit is ready , And the input to the circuit is the 3.5 mm Jack.The jack will be connected to a mobile Phone. When the user unplugs the jack, I need to reset/turn off the DTMF decoder Ic
  14. M

    How to detect a valid connection in a circuit?

    Im still waiting for a reply . . .. :-(
  15. M

    How to detect a valid connection in a circuit?

    thanks for the reply chuckey !!! hxxp://www.circuitsgallery.com/2012/07/dtmf-dual-tone-multi-frequency-decoder-circuit-schematic-using-m8870-ic.html pls see the above link, which has the circuit diagram im following.... pls explain the idea with a circuit if posdible.. since im not an...
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