Search found 141 matches

by blundar
Sat Jan 11, 2014 6:39 am
Forum: Dev: Hardware
Topic: Vishay SIS414dn low side switch
Replies: 9
Views: 6106

Re: Vishay SIS414dn low side switch

after talking with kb1gtt, I'll concede that there are good reasons to use a protected MOSFET and this is something that should be explored. They're simultaneously very easy and very hard to find. All the majors (ST, ON Semi, Infineon, Vishay, ... ... ) seem to have decent parts. Once there are some...
by blundar
Sat Jan 11, 2014 6:37 am
Forum: Dev: Hardware
Topic: Can we simply replace 5v with 3.3v?
Replies: 5
Views: 4331

Re: Can we simply replace 5v with 3.3v?

Most Hall sensors have open collector outputs (i.e. they sink current to ground so you can use whatever pull up voltage you like) and they also generally can be powered by 12V. The OC output means the supply voltage isn't connected to the output voltage.
by blundar
Sat Jan 11, 2014 6:33 am
Forum: Dev: Hardware
Topic: HIP9011 module
Replies: 34
Views: 22865

Re: HIP9011 module

OE Ion sensing systems I know of: -Saab Trionic turbo4 -Some Isuzu / Honda V6 Delphi seem to be getting on board with Ion: http://delphi.com/pdf/techpapers/2013-01-0354.pdf I'm still not convinced that it will ever be truly useful, especially for high revving race engines. Ion is useless during the ...
by blundar
Sat Jan 11, 2014 5:10 am
Forum: Dev: Hardware
Topic: Fiber Optic bus
Replies: 7
Views: 5257

Re: Fiber Optic bus

I personally feel that this is overkill. As we discussed, it might make sense to have available as an option for module linkup on a PHY level but that still leaves a higher level protocol (SPI, I2C, CAN?, ATM?, AL?) to implement over the top. Why do I think this is overkill? -differential signalling...
by blundar
Wed Jan 08, 2014 6:19 pm
Forum: Dev: Hardware
Topic: Vishay SIS414dn low side switch
Replies: 9
Views: 6106

Re: Vishay SIS414dn low side switch

kb1gtt, do you do skype or gchat? I'd like to chat more about the contents of that wiki page. Every single OE ECU and standalone that I've ever had apart uses the diode/through injector method of dissipating. The method you put on the wiki sounds interesting, but the concern over long term exposure ...
by blundar
Wed Jan 08, 2014 7:24 am
Forum: Dev: Software
Topic: wide temperature range
Replies: 6
Views: 4175

Re: RTOS options

kb1gtt: define "wide temperature range" The best I can think of off the top of my head is going the be a Cortex A8 derivative, like Beaglebone Black. TI Sitara AM335x. http://www.ti.com/product/am3358 They list an extended temp range model (-40 to 105C) in the datasheet. Whether it is unob...
by blundar
Tue Jan 07, 2014 9:56 pm
Forum: Dev: Hardware
Topic: Power supply - kb1gtt
Replies: 212
Views: 117569

Re: Power supply - kb1gtt

You can power gauges by external power. Putting a beefcake PSU inside the ECU for external gauges makes little sense to me. What kind of design parameters are we working around here for PSU? I'm not trying to be difficult / rude, just trying to grasp what is the goal. If there is a place for me to R...
by blundar
Tue Jan 07, 2014 4:38 pm
Forum: Dev: Hardware
Topic: Vishay SIS414dn low side switch
Replies: 9
Views: 6106

Re: Vishay SIS414dn low side switch

It also helps that there is a 80W CO2 laser at the local hackerspace. I can cut Kapton solderpaste stencils. Sometimes a little hard when getting smaller than about 2mil but doable. Still working on technique
by blundar
Tue Jan 07, 2014 4:37 pm
Forum: Dev: Hardware
Topic: Vishay SIS414dn low side switch
Replies: 9
Views: 6106

Re: Vishay SIS414dn low side switch

I used a STM32VLdiscovery board (I think? the one with the LCD display) for a reflow oven controller. That reminds me, I've been meaning to put that source and stuff up on github.
by blundar
Tue Jan 07, 2014 4:36 pm
Forum: Dev: Hardware
Topic: Vishay SIS414dn low side switch
Replies: 9
Views: 6106

Re: Vishay SIS414dn low side switch

I built a reflow oven :) It was easy like that.
by blundar
Tue Jan 07, 2014 4:27 pm
Forum: You and your build
Topic: Greetings
Replies: 3
Views: 3078

Re: Greetings

Thanks for the welcome. My truck is the last generation HEUI (high pressure oil) before common rail hit. My next truck will probably be common rail because well... everything is common rail now because it's awesome. Maybe once I have another "reliable" truck (*cough* you can't quite use &q...
by blundar
Tue Jan 07, 2014 4:18 pm
Forum: Dev: Hardware
Topic: Vishay SIS414dn low side switch
Replies: 9
Views: 6106

Re: Vishay SIS414dn low side switch

This is offered up as a suggestion towards moving towards 100% 3.3v
by blundar
Tue Jan 07, 2014 4:14 pm
Forum: Dev: Software
Topic: RTOS options
Replies: 33
Views: 21202

Re: RTOS options

Ya, all the major MCUs used today by OEMs (SH, tricore, MPC56, etc.) have bad ass TPU units designed to offload a lot of the timing sensitive stuff. The TPU is almost as much silicon as the MCU in some of the newer Renesas designs. The TMS570 looks promising too, but the price on it is pretty damn h...
by blundar
Tue Jan 07, 2014 4:05 pm
Forum: Dev: Hardware
Topic: Can we simply replace 5v with 3.3v?
Replies: 5
Views: 4331

Re: Can we simply replace 5v with 3.3v?

Most hall sensors are open collector - they'll work with whatever voltage (within reason) you pull them up to. There are a lot of engine sensors (MAP most notably) that expect a 5V reference signal. You could use a minimal LDO reg and current limiting resistor setup there. That's probably the hardes...
by blundar
Tue Jan 07, 2014 3:49 pm
Forum: Dev: Hardware
Topic: Vishay SIS414dn low side switch
Replies: 9
Views: 6106

Vishay SIS414dn low side switch

It isn't integrated but I ended up using many Vishay SIS414dn FETs in a design for injector drivers and had no issues aside from it being very hard to solder by hand (i.e. reflow oven required) http://www.vishay.com/docs/66588/sis414dn.pdf Things I liked: -0.016ohm Rds w/ 2.5V Vgs !!! So 3.3V drive ...
by blundar
Tue Jan 07, 2014 3:39 pm
Forum: Dev: Hardware
Topic: HIP9011 module
Replies: 34
Views: 22865

Re: HIP9011 module

http://www.findchips.com/avail?part=HIP9011 Rochester electronics looks to have quite a few of them but the "major" electronics retailers seem to have retired the part. http://www.findchips.com/avail?part=TPIC8101 Marginally better stock on the TPIC8101. It's still a chip approaching end o...
by blundar
Tue Jan 07, 2014 3:33 pm
Forum: Dev: Hardware
Topic: CAN module - SN65HVD230
Replies: 25
Views: 24808

Re: CAN module

It might also be nice to have a bus termination jumper. 120ohm termination is expected at the end of CANbus nodes. I use RC1206FR-07120RL I've wondered about doing this with a FET, either using solely a FET with RDSon close to 120ohms or using a FET with extremely low RDSon coupled with a fixed resi...
by blundar
Tue Jan 07, 2014 3:21 pm
Forum: Dev: Hardware
Topic: Power supply - kb1gtt
Replies: 212
Views: 117569

Re: Power supply - kb1gtt

I have about a dozen different ECUs downstairs right now (Honda OBD1, Honda OBD2, Nissan OBD1, Nissan OBD2, Honda OBD2, Ford OBD1, Ford OBD2, Ford Diesel ECM, Ford Diesel FICM, GM OBD2, Audi OBD2, BMW OBD1, ...) EVERY SINGLE ONE uses a LDO style regulator mounted on the case or a large thermal pad o...
by blundar
Tue Jan 07, 2014 5:37 am
Forum: Dev: Software
Topic: RTOS options
Replies: 33
Views: 21202

Re: RTOS options

I've been really impressed with Chibi so far for STM32... Lot of momentum there, and it seems to not be going anywhere. I looked into the ERIKA and OSEK but they're more RTOS and less STM32HAL, so I guess it would depend on how much work you felt like doing. Over.
by blundar
Tue Jan 07, 2014 5:32 am
Forum: You and your build
Topic: Greetings
Replies: 3
Views: 3078

Greetings

Saw this on HaD and came by. I've been working with reverse engineering + tuning OEM EFI systems since 2002. I've been doing performance tuning or working with automotive engine management systems for a living since 2005. I currently work for http://www.moates.net doing a mixture of tech support, tr...
by blundar
Tue Jan 07, 2014 5:21 am
Forum: Dev: Hardware
Topic: Power supply - kb1gtt
Replies: 212
Views: 117569

Re: Power supply - kb1gtt

This is what I've used in the past. I don't think I broke $10 in components, but it was probably close. It's not as spiffy as what's been proposed here in many ways but it was specified to take 0 to 48 volts input and also be safe with reverse polarity at full 48v. I use eagle... Sorry. I can post ....