Beginners: please read this post and this post before posting to the forum.
0 Members and 1 Guest are viewing this topic.
How was your trip? Hope all went well.I was going to ask if I should purchase the 4093n now or wait a bit.
So when the resistor is placed between HP and B- the circuit will make noise........Imagine that!
I am feeling much better they slipped a stint in my Heart and back to bugging you
3.Output stud from distributor read a steady 3.16vdc volts. Now I changed rpm up and down and the reading did not change it was also steady.4. The Voltage reading from that same output stud set to lowest AC scale was reading 6.4vac and it also was steady and stayed stable.
Now I don't have my standard alternator that charges my Battery hooked up so I don't know if these reading would vary if it was charging my starting battery.
Anyways Soeren I wanted to say hello and see if we can start again on this if you don't mind?Also I ordered a B/K O scope it's Analog 20mhz I thought it would work well for a beginner.So I'll watch to see if you care to respond. Take care and Best regards
I do have the 4093 chips now and the LM555, could you tell me what IC2A and IC2B is recommended are they op amps?
I will start building the circuit and as I progress I will fill you in and wait for your suggestions.
Oh I forgot to ask, The readings that I am reading on the out put post AC and DC are staying stable even though I was changing RPM's. Am I thinking right that voltage amplitude does not have to change while signal freq increases or decreases?Hope that wasn't a stupid question
As I am sure you are learning, this forum can be an unfriendly place. Good luck with your project. I looked at the video and pictures. Looks interesting.
[...] if you have the PCB LAYOUTS that I could have would be great!
My oscope came today it seems to work okay so far. I tried to Calibrate it today from a PDF manual and it seem to do well.It is a B and K precision 20mhz scope paid $29.00 USD for it I think it will help me learn much faster and was not very expensive.
Here is a picture of it I hope you can help me learn to use it
On Monday I will be home and want to try getting the signal readying off that hall output. So what would you suggest testing first before I jump on the engine.
I am having fun just checking some low voltage stuff.
One question I have the ground lead on the probes are they always use when checking a signal?
On the scope it shows a Square wave, Voltage level of just above 4vdc and the "on part of the pulse 5mS" and the "off was 3mS" on the 2mS/div.
After I took these measurements I increased and decreased RPM's, You could watch as signals increase and decrease to throttle responce and the Vdc stayed constant at a little over 4Vdc. My DMM was reading 3.16vdc so there is a difference between the scope and DMM reading.
So there you have it! I hope I did it right ? I think I did
Soren is there any other measurements you would like me to get? I still have a copy of the pdf of the circuit and I hope you can fill in the blanks for resistor and cap's with these measurements.
Just let me know what to do next that will help! I will start putting the componets on the proto board tomorrow.
Is the lower part of the trace shown at ground potential (0V) or at some "higher" voltage?a pulse period of 8ms equates to 1875 RPM on an 8-banger. The scope cannot be read with super resolution, but for 1200 RPM, the period should be 12.5ms and such a deviation (36%) is not possible - how do you decide it's running at 1200 RPM?
But the period changed accordingly I guess?
Just tell me if the low part of the trace is at ground level.I have allready changed a bit in the schematic, when you confirm the voltage level of the low part of the trace, I'll move on.
That's what happen from getting a 'scope - you get itchy palms I'll check for your post tomorrow (it's [past] bedtime here) and see if I can get it ready for you with same-day-delivery
Congrats on your new best toy
It will save you from having to start the engine for each test. And you can use it where you build the circuit and won't bother anyone if you choose to test the circuit late at night.
That way you can build to the circuit in "modules" on a breadboard first (and get any errors tweaked out), understand each part of it while you go along and get some practice with your 'scope.
Your right the guy next door hates when I fire it at 3:00 AM, so this circuit will help
I think thats a good idea and keeps the bugs down to a smaller location
Also I wanted to ask what is J1 in the circuit you just sent is it a Jumper or ?...........Had to ask just wasnt sure