Search found 17 matches
- Thu Nov 13, 2014 8:23 am
- Forum: FOSS EMS Hardware
- Topic: VR Sensors and the MAX992x
- Replies: 6
- Views: 17157
Re: VR Sensors and the MAX992x
Yeah, I have done some more playing around and this is what I have found... I found this article after looking up the effects of load and phase: http://www.sensorsmag.com/sensors/electric-magnetic/magnetic-sensors-and-timing-applications-935 The sensor can be represented by a voltage source the coil...
- Sun Nov 09, 2014 10:08 am
- Forum: FOSS EMS Hardware
- Topic: VR Sensors and the MAX992x
- Replies: 6
- Views: 17157
Re: VR Sensors and the MAX992x
I'm sorry, but you're wrong about this, and it's easy to demonstrate why, while still obeying various laws of physics, some of which you seem to be ignoring. Simply apply a dead short (or something approximating it) to the output, and watch a near-zero voltage appear, no matter the speed it's going...
- Fri Nov 07, 2014 11:37 pm
- Forum: FOSS EMS Hardware
- Topic: VR Sensors and the MAX992x
- Replies: 6
- Views: 17157
VR Sensors and the MAX992x
After reading on various forums about VR sensor input conditioning, all I could find was a lot of conflicting information and anecdotal reasoning for why certain circuits work. So I decided to do my own research from a hard facts and mathematical based standpoint. VR Sensors The VR Sensor has two im...
- Thu Oct 30, 2014 7:11 pm
- Forum: FOSS EMS Hardware
- Topic: Another MAX9926 VR board
- Replies: 47
- Views: 117034
Re: Another MAX9926 VR board
You are likely thinking of their evaluation board schematic, which uses two 5k in series instead of 1 10k. Can't remember the reason now, but it may have been to make the LPF more configurable. Just had a look, they are only there to share the current, so they can use lower wattage resistors. http:/...
- Mon Oct 27, 2014 11:47 pm
- Forum: FOSS EMS Hardware
- Topic: Another MAX9926 VR board
- Replies: 47
- Views: 117034
Re: Another MAX9926 VR board
Has there been much investigating into different values for the input capacitor? Looking at the data sheet for the NCV1124, there are a bunch of equations to calculate the input resistors and capacitors, for a given sensor impedance, peak voltage and frequency.
- Mon Oct 27, 2014 11:34 pm
- Forum: FOSS EMS Hardware
- Topic: OEM connector footprints
- Replies: 5
- Views: 18514
Re: OEM connector footprints
Yeah it was a vague quesion, sorry. The answer you have was exactly what I was after. If they were $100-$200 a connector that would be too expensive to justify making footprints. $10 -$50 is quite reasonable.
- Mon Oct 27, 2014 9:32 am
- Forum: FOSS EMS Hardware
- Topic: OEM connector footprints
- Replies: 5
- Views: 18514
Re: OEM connector footprints
Whats the cost est. of these connectors? I will have a go at making one for my connector.
- Sun Oct 26, 2014 10:32 am
- Forum: FreeEMS User Support
- Topic: FreeEMS on an AW11 4AGZE
- Replies: 9
- Views: 31289
Re: FreeEMS on an AW11 4AGZE
Hey Fred, Yeah I'm in Auckland, I saw some stuff about freeEMS on oldschool.co.nz a few years back, but only now am I financially and intellectually ready to play around with it. The AW11 is a fun car, but its a struggle to get through WOFs for some reason, mostly because of tinworm. The later 4AG(Z...
- Sun Oct 26, 2014 10:18 am
- Forum: FOSS EMS Hardware
- Topic: Another MAX9926 VR board
- Replies: 47
- Views: 117034
Re: Another MAX9926 VR board
Ahh I see, ivan141's calculations assume the shunt is after the 10k resistors. he just rearranged P=(V^2)/R, and solved for V with a known P and R. Since with the shunt before the 10ks it no longer creates a voltage the divider, does the attenuation occur because of the pickup coils VA? By creating ...
- Sat Oct 25, 2014 1:42 am
- Forum: FreeEMS User Support
- Topic: FreeEMS on an AW11 4AGZE
- Replies: 9
- Views: 31289
Re: FreeEMS on an AW11 4AGZE
Is there a quick and easy ignition system I grab off a car at pick a part?