Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
I understand how PWM works for the most part. Would it make more sense of my intention if I said “open or closed” for the solenoid? I’m not referencing the voltage to the solenoid, but it’s operation. The circuit can be on/off because of duty cycle, but that doesn’t mean the solenoid is...
Don’t take my questions as assumptions. I’m taking what’s posted and trying to google and do some of my own leg work as not to be lazy. But I have almost zero experience in this field so take it a little easy. I’m try my best not to just say “gimme.”
I don’t contradict myself. The solenoid is...
These solenoids are designed to be driven by PWM, and are not simple on/off driven. Fuel pumps in cars now a days are done the same way for pump life. So basically the solenoid is always fed positive current it is controlled by PWM on the ground side.
I need the PWM to precisely control the...
Looks like a non logic mosfet will do what I need. Maybe
Trying to control a solenoid. Fully activated it draws 850ma. It’s a PWM to ground. But the controllers I see that control duty cycle and Hz independently, the signal is only good for 30ma.
So if a mosfet is voltage based only so I don’t...
Again with this lol
So I’m finding plenty of PWM setups. The ones where I can adjust both duty cycle and freq, have a low power tolerance. I shouldn’t need all 850ma to operate the solenoid but that’s its requirement. Dual adjustability unit I have only seen a capability of 30ma. The PWM I find...
Nah thread just got moved here. Not interested in fixing myself. That's why I didn't post it in this section but oh well.
I didn't see anything obvious. The codes the machine is throwing all point to the servo boards. Just looking for a good company to send it to.
Hey this was the closest thing I could find to find this thread. Wondering if anyone could help me out.
I see lots of places to send boards off to be looked at/repaired. Thought this would be a good place for a reference. I have two servo boards off a Yasnac controller off my lathe. They want...
Betwixt, the missing tooth is deliberate. You're right, it is for reference. Basically what the attempt here is to trick the ecu in a car. The factory has set a ceiling limit on the rpm. So we can change it all we want as long as it's not set above that. So we want the engine to mechanically...
Thanx Brian. I was sure the capacitor would just be too easy. The way it goes lol.
1 and 4 look like the only viable options. I'm glad that all made sense, here's the catch lol.
The trigger has 35 teeth, and has one missing. (Would have 36 evenly space teeth if the wheel was not missing one...
See if I can explain this correctly.
We are trying to take a 12v signal and reduce its rpm.
The sensor is magnetic. The sensor is fed 12v, a metal wheel w teeth evenly spaced rotates near the sensor and the tooth triggers a pulse. The pulsing is sent out and read. What we'd like to essentially...
Thanks a bunch guys, really does help. It will be low use item. I think the low cost and rock solid reliablity of a resistor should work out awesome. Two resistors is an awesome idea. Should have thought of that for the last project when I was doing higher current and had to get a big resistor...
No such word as amperage you say. Shows you my level of "expertise" eh? Lol
I went back and looked, and it actually looks like 50mA is what it needs. Solenoid is going to be 5.5ohms. And a 5v source is going to make my resistor smaller, so,....
(5/.05)-5.5=94.5 ohm resistor. I can buy a pot in...
I know voltage isn't amperage, but I have either a 12v or 5v source to choose from. This will be feeding a varying solenoid. The position I'd like it in will require 850 milliamps(say the instructions.) Since this isn't a simple voltage reduction I was wondering if you guys had any input. It...
Wow had no idea pwm had that side to it. Almost looks like for what I need, pwm is going to be more trouble than it's worth. I need it work on the lower end of the spectrum of about 0-6v. But with all the dead space in the lower voltage area I might be SOL. After reading those articles a simple...
Thanx Willis. What I'm not understanding is the 5.0v logic and 3.3v.
The pulse width I get. 60v @ 50% duty cycle would be 30v effectively.
I found 5.0v logic on wiki. Damn lol. Is 6v-90v just the logic family then? Or is it something I really don't need to know and going to over complicate?
I...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
