Worcester/Boston Social Thread
Well i can definitely help with the soldering and could probably make my way reading a circuit schematic. I enjoy soldering so thats not a problem and will definitely help with testing.
Also let me know if you want to pick up those downpipes. I am going to have greg weld me in a second o2 bung for the WB. When i figure out a good place to put it he can weld in one for you too if you want. I figure we will need those for testing. Zeus sent me all the info so whenever we are ready.
Also let me know if you want to pick up those downpipes. I am going to have greg weld me in a second o2 bung for the WB. When i figure out a good place to put it he can weld in one for you too if you want. I figure we will need those for testing. Zeus sent me all the info so whenever we are ready.
Last edited by MR Turco; Jan 15, 2008 at 10:45 AM.
Well i can definitely help with the soldering and could probably make my way reading a circuit schematic. I enjoy soldering so thats not a problem and will definitely help with testing.
Also let me know if you want to pick up those downpipes. I am going to have greg weld me in a second o2 bung for the WB. I figure we will need those for testing. Zeus sent me all the info so whenever we are ready.
Also let me know if you want to pick up those downpipes. I am going to have greg weld me in a second o2 bung for the WB. I figure we will need those for testing. Zeus sent me all the info so whenever we are ready.
Evolved Member
Joined: Feb 2006
Posts: 1,345
Likes: 1
From: MA
also need to decide on a micro controller. i _really want to use an ARM7, but some form of PIC might be cheaper
ideally i need a processor that can do 32bit math, a good amount of Flash or EEPROM, several low latency built in ADC ins and PWM outs. Also need to figure out if i can drive the pump current using PWM, or do i need to filter convert it to DC as to not burn out the sensor, and how much more its going to cost for that type of circuitry.
Well i can definitely help with the soldering and could probably make my way reading a circuit schematic. I enjoy soldering so thats not a problem and will definitely help with testing.
Also let me know if you want to pick up those downpipes. I am going to have greg weld me in a second o2 bung for the WB. When i figure out a good place to put it he can weld in one for you too if you want. I figure we will need those for testing. Zeus sent me all the info so whenever we are ready.
Also let me know if you want to pick up those downpipes. I am going to have greg weld me in a second o2 bung for the WB. When i figure out a good place to put it he can weld in one for you too if you want. I figure we will need those for testing. Zeus sent me all the info so whenever we are ready.
Dex,
Please don't hesitate to ask if you need anything throughout the process.... even if it's just to use the benches in the garage and have an extra solderer. I used to live and breathe analog circuit design so I know my way around a PCB....actually, I'm doing a lot of it now, at work as well...
I can imagine this shaping up to be a fun project...with production weekends in the workshop at my house.... w00t!
thats why we're using a PID and not a PI controller. i think the differential term damps it also keeping it from oscillating.
Pretty soon. I still have alot more research to do. I still need more information on the Bosch LSU 4.2, I haven't found any whitepapers, datasheets or application notes on the sensor. might have to contact Bosch directly.
also need to decide on a micro controller. i _really want to use an ARM7, but some form of PIC might be cheaper
ideally i need a processor that can do 32bit math, a good amount of Flash or EEPROM, several low latency built in ADC ins and PWM outs. Also need to figure out if i can drive the pump current using PWM, or do i need to filter convert it to DC as to not burn out the sensor, and how much more its going to cost for that type of circuitry.
Pretty soon. I still have alot more research to do. I still need more information on the Bosch LSU 4.2, I haven't found any whitepapers, datasheets or application notes on the sensor. might have to contact Bosch directly.
also need to decide on a micro controller. i _really want to use an ARM7, but some form of PIC might be cheaper
ideally i need a processor that can do 32bit math, a good amount of Flash or EEPROM, several low latency built in ADC ins and PWM outs. Also need to figure out if i can drive the pump current using PWM, or do i need to filter convert it to DC as to not burn out the sensor, and how much more its going to cost for that type of circuitry.
Dex,
Please don't hesitate to ask if you need anything throughout the process.... even if it's just to use the benches in the garage and have an extra solderer. I used to live and breathe analog circuit design so I know my way around a PCB....actually, I'm doing a lot of it now, at work as well...
I can imagine this shaping up to be a fun project...with production weekends in the workshop at my house.... w00t!
Please don't hesitate to ask if you need anything throughout the process.... even if it's just to use the benches in the garage and have an extra solderer. I used to live and breathe analog circuit design so I know my way around a PCB....actually, I'm doing a lot of it now, at work as well...
I can imagine this shaping up to be a fun project...with production weekends in the workshop at my house.... w00t!
Newbie
Joined: Aug 2007
Posts: 5
Likes: 0
From: old testament god of the squirrels
also need to decide on a micro controller. i _really want to use an ARM7, but some form of PIC might be cheaper
ideally i need a processor that can do 32bit math, a good amount of Flash or EEPROM, several low latency built in ADC ins and PWM outs. Also need to figure out if i can drive the pump current using PWM, or do i need to filter convert it to DC as to not burn out the sensor, and how much more its going to cost for that type of circuitry.
ideally i need a processor that can do 32bit math, a good amount of Flash or EEPROM, several low latency built in ADC ins and PWM outs. Also need to figure out if i can drive the pump current using PWM, or do i need to filter convert it to DC as to not burn out the sensor, and how much more its going to cost for that type of circuitry.
you could try one of the renesas super-h or moto hc16 processors.
http://eu.renesas.com/fmwk.jsp?cnt=o...ort/operating/
http://www.testech-elect.com/imagecr...ment_tools.htm
i think there are actually free tools for code generation for the latter if you can make due with 16 bit. i may have an older version of codewarrior that would do it as well....
Newbie
Joined: Aug 2007
Posts: 5
Likes: 0
From: old testament god of the squirrels
turco-
PID control uses proportional, integral and derivative gains to control how a device moves from its current state to a desired state. it's how the boost control system on a subaru works. you have a current boost level and then you have a target level. you can't just slam the solenoid shut and open it up when you hit target, so you have those three gains which control how the device transitions.
if you were way off boost target, you could probably ramp up very aggressively, but you'd have to slow down as you approach target, or else you run the risk of overshooting.
PID control uses proportional, integral and derivative gains to control how a device moves from its current state to a desired state. it's how the boost control system on a subaru works. you have a current boost level and then you have a target level. you can't just slam the solenoid shut and open it up when you hit target, so you have those three gains which control how the device transitions.
if you were way off boost target, you could probably ramp up very aggressively, but you'd have to slow down as you approach target, or else you run the risk of overshooting.
Evolved Member
Joined: Feb 2006
Posts: 1,345
Likes: 1
From: MA
you could try one of the renesas super-h or moto hc16 processors.
http://eu.renesas.com/fmwk.jsp?cnt=o...ort/operating/
http://www.testech-elect.com/imagecr...ment_tools.htm
i think there are actually free tools for code generation for the latter if you can make due with 16 bit. i may have an older version of codewarrior that would do it as well....
http://eu.renesas.com/fmwk.jsp?cnt=o...ort/operating/
http://www.testech-elect.com/imagecr...ment_tools.htm
i think there are actually free tools for code generation for the latter if you can make due with 16 bit. i may have an older version of codewarrior that would do it as well....
BOGUSSS!!!!!!
not sure if the free information is enough.
Last edited by EvoBroMA; Jan 15, 2008 at 11:27 AM.
ahh ok. See that makes sense. Why didn't they just explain it like that?! Since this device wont necessarily be controlling anything, just reading a voltage and outputting a correlated number would we be concerned with that? I know it is more complicated then that but yeah...
Newbie
Joined: Aug 2007
Posts: 5
Likes: 0
From: old testament god of the squirrels
http://www.maperformance.com/store/p...roductid=16169
and these guys have tons of good info
http://wbo2.com/lsu/
just stay away from the vw sensors. they suxors too.
and these guys have tons of good info
http://wbo2.com/lsu/
just stay away from the vw sensors. they suxors too.
well I didn't work today.
I was on the way to Brighton at about 8am and my acc belt decided to come off on its own at a stop light. Well usually this would be a simple fix as I thought it was just old and dry from Vegas. Ha ya right. I bring the car to get looked at on a lift and the weirdest thing happened the crank pulley is almost falling off. out of the 4 bolts that hold it on the pulley only 1 was left and that one is loose. The other 3 broke off inside the cam sprocket on the crank.
This is going to be a fun adventure.
I was on the way to Brighton at about 8am and my acc belt decided to come off on its own at a stop light. Well usually this would be a simple fix as I thought it was just old and dry from Vegas. Ha ya right. I bring the car to get looked at on a lift and the weirdest thing happened the crank pulley is almost falling off. out of the 4 bolts that hold it on the pulley only 1 was left and that one is loose. The other 3 broke off inside the cam sprocket on the crank.
This is going to be a fun adventure.