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  1. pieterw0

    Speed-limit Alert PLEASE HELP!!!!!!!!

    Hi audioguru I havn't thought of trying the project in this state. I will try the way you sugested. I have gone to the RED FREE CURCUIT DESIGNS web page. At the bottom of the page there is buttons e-mail and questions. I have posted a few e-mails without any reply. If this is the e-mail you...
  2. pieterw0

    Speed-limit Alert PLEASE HELP!!!!!!!!

    Hi audioguru What happens is this. When I attach the power D1 lights up and stays on. D5 flashes and the buzzer sounds on a per second basis. This all happens until I disconnect the battery or when I switch the unit off. So if you recon that the Pc board is ok then that means that the circuit...
  3. pieterw0

    Speed-limit Alert PLEASE HELP!!!!!!!!

    audioguru Just to confirm! The common or third legs of R8 and R11 is conected (Wiper function). R8 and R11 is both mounted on the project box for easy acsess. I have checked the Pcboard layout again. Pieter
  4. pieterw0

    Speed-limit Alert PLEASE HELP!!!!!!!!

    Thanks for responding Yep this is the one. No I have not substituted any parts. For R9 I have used 470 ohm and R20 150 ohm. What does concern me is the IC4069 layout. I could be wrong there but i'm not sure. IC1 = TL061CN IC2 = CD4069UBE IC3 = CD4098BE Transistors = BC238B All the other...
  5. pieterw0

    Speed-limit Alert PLEASE HELP!!!!!!!!

    Hi guys I am new to this forum and hope I can get some assistance. I recently discovered the Electronics lab web site and decided to build the Speed Alert. The project is finish but has a problem. Still on the work bench, when I attach the battery the beeper and the LED working together lights...
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