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  1. pieterw0

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

    Hi MP Thanks for the advise I got it working in a way. Pieter
  2. pieterw0

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

    Thanks! ;D
  3. pieterw0

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

    Thanks for the feedback tnk2k and Ante I will scratch around a bit and see what I can come up with. Pieter
  4. pieterw0

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

    Audioguru I am still on the old circuit. (Original) Pieter
  5. pieterw0

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

    Ante You got me very interested in your suggestion. The small piece of metal, is this attached to the shaft with the inductor a few inches away? Could you give more info as far as the specs of the inductive sensor. Perhaps if you have something on this type of configuration I would be happy to...
  6. pieterw0

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

    Hi Ante I was actualy playing around with audioguru and the 5th wheel. As you might have noticed from his posting that in my opinion I think he was sarcastic. So I humored him. Anyway I was looking at magnetic sensors as well as reflective laser pick up's that works on a shaft. (Prop shaft or...
  7. pieterw0

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

    Audioguru It is a speed alert. you called it a long distence speed alert. ;D I think I will settle for the 5th wheel. ???  ;D 8) Any ideas what size? Pieter
  8. pieterw0

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

    Audioguru I meant to ask you. I have the project working in a way. With this unit working on rpm it should warn on what ever revs are set. In my car the unit is set for 2000rpm which represents approximately 60 kph. When you pull away from stand still in first gear the revs reaches 2000rpm...
  9. pieterw0

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

    Hi Audioguru Sorted it out THANKS! Who made electronics so complicated anyway? ;D Pieter
  10. pieterw0

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

    Hi Audioguru The black lines does represents the connections as you sugest. The switch also selects each pot individually. What happens is that instead of each (SELECTED) pot adjusting between 0 and 100K, each selected pot adjust only between 55K and 85K. It doesn't go to zero and it doesn't...
  11. pieterw0

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

    Hi Audioguru What is wrong with this picture. This is a Make before break single pin select switch. This configuration means the values of the 4 pots. Is there a different way of  doing it or should I rather get a switch that select 2 pins simultaneously so that each pot could be selected...
  12. pieterw0

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

    Hi Audioguru In the right up the author sugested the following. Depending on the engine's cylinders number, R11 can be unable to set the device properly. In some cases you must use R11=200K and R12=100K or less. I did follow his advice but with with little change. So I thought I could make...
  13. pieterw0

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

    Hi Audioguru A small problem. I need to change some resistor values in the warning part of the circuit.(Old circuit) When I set R11 to 47K it moans on 1000 rpm. When I adjust R11 to 0 the highest revs I get is 1500 rpm. I need to gain at least another 2000 rpm. Because I cant go further than...
  14. pieterw0

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

    Hi Audioguru and guys. My humblest apologies to every one on the forum !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I found out by accident that with pin 4 on IC1 connected works. The fact of the matter is that my computer is on the work bench. Having said this the magnetic pulses generated by the...
  15. pieterw0

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

    Hi Audioguru and guys. Could you go back a few posts please! There is a few questions that I would like for you to answer, if it is not to much trouble. To answer Dazza’s question. I have a mechanical speedometer. This brings about a different topic. The application I want is a unit that if I...
  16. pieterw0

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

    Hi Audioguru Yes it’s excellent. This is what  I had in mind. Just a few questions. 1) The old IC1 and IC2 will amplify the signal to keep it long range. R8, D1 will still indicate the best sensing  position of the unit. Is this correct? 2) Pin 3 of IC LM2917 with the trimmer will select the...
  17. pieterw0

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

    Hi Audioguru I want to try a new concept. In fact, the one you suggested. This is the latest as you said. This IC converts frequency to volts. All in one. Hope I’m right! So if you don’t mind lets start with the pick up and amp for now. I would like to keep it wireless. I have come to a point...
  18. pieterw0

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

    Hi Audioguru Let's start from the beginning if you don't mind. One must accept that there is an inballance in the curcuit as it is. If you look at the schematic. From L1 right through to IC 4098 and D1 and R9. This section picks up the signal to about 1.5 m. Why does the second part not...
  19. pieterw0

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

    Hi Audioguru It is fact. I agree with you. It is shown as hidden power pins, but what I did was to start cutting tracks. Remember I said that D1 and D5 with it's buzzer  would sound from beginning to end non stop. I have even moved the unit next to the spark plugs and wires and wouldn't change...
  20. pieterw0

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

    Hi Audioguru Ok! I have some success. I had a look at the data sheets for IC1, IC2 and IC3. On the data sheet for IC 1, I noticed that pin 4 and 7 are not widely used in some of the app examples. I  disconnected pin 4 and “Walla”. It works. The only drawback of this circuit is that it is...
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