Search found 237 matches

by toalan
Wed Jun 11, 2008 4:46 pm
Forum: FreeEMS Hardware Dev
Topic: PSoC based possibilities
Replies: 16
Views: 29249

Re: PSoC based possibilities

I work with PSOC on a daily basis. As a general platform they are not good, by most typical metrics they totally suck: -banked memory, -3MIPS @ 24mhz, -power hungry. Also: -it has poor documentation, -small user base. psocdeveloper.com is the main forum about psoc and this forum has more activity on...
by toalan
Tue Jun 10, 2008 6:14 pm
Forum: Suppliers
Topic: Nifty Wideband to Check Out [JAW, old thread]
Replies: 46
Views: 107855

Re: Nifty Wideband to Check Out

Weaknesses: RPM pickup is for 5 volt square wave, for interfacing with a tach you will need to put in atleast a resistor in series with the tach signal. Ideally you want to have a resistor+cap+diode circuit. This issue is addressed with the new JAW I will release in July Slow response time, the res...
by toalan
Tue Jun 10, 2008 4:17 pm
Forum: Suppliers
Topic: Post your local hardware suppliers here!
Replies: 9
Views: 39759

Re: Post your local hardware suppliers here!

Components/dev boards/kits http://www.futurlec.com run by aussies, but ships from thailand, shipping is very reasonable Soldering tools/components/general tools http://www.circuitspecialists.com for anything soldering related they are very good and cheap. They also have cheap power supplies signal g...
by toalan
Tue Jun 10, 2008 4:00 pm
Forum: FOSS EMS Hardware
Topic: Knock detection filter circuitry
Replies: 18
Views: 33551

Re: Knock detection filter circuitry

Hi, I have some interest in knock sensing. To me the ideal method would to use DSP techniques and forget about using too much analog filters. That would probably require a 32 bit uC perhaps maybe even a very high end 32 bit uC. A good starting point would be to use a USB based DAQ system and do the ...
by toalan
Tue Jun 10, 2008 3:24 pm
Forum: Suppliers
Topic: Nifty Wideband to Check Out [JAW, old thread]
Replies: 46
Views: 107855

Re: Nifty Wideband to Check Out

Hi All, My name is Alan To, I am the designer of JAW. I am here to answer any questions you may have. Thanks 8inches for inviting me and thanks Fred for giving me permission to post. I don't have any hangups about JAW and I will be open to discussing its flaws and shortcommings as well as it merits....
by toalan
Tue Jun 10, 2008 5:08 am
Forum: General FOSS EMS
Topic: possibly pursuing a wideband o2 controller
Replies: 13
Views: 20355

Re: possibly pursuing a wideband o2 controller

Selecting the right microcontroller is very critical. 90% of the work is writing code for the micro. The right micro will not magically make everything perfect, but using the wrong micro will ensure that your project never gets off the ground. When I mean right and wrong, 50% has to do with the spec...
by toalan
Tue Jun 10, 2008 3:57 am
Forum: FOSS EMS Hardware
Topic: Low quantity pcb manufacturers
Replies: 63
Views: 137745

Re: Low quantity pcb manufacturers

Hi All, I have done extensive shopping for PCBs and here are my opinions: PCBfabexpress: Last time I ordered from them, about 1.5 years ago, they had awesome specials, something like $10 per 2 layer board with good specs. It looks like they no longer offer those specials, but their prices are still ...