Reminder from the Calendar of mugwa
http://groups.yahoo.com/group/mugwa/cal
Monthly MUGWA meeting
Tuesday July 20, 2004
7:30 pm - 12:30 am
(This event...
Yahoo! Reminder
reminders@...
Jul 18, 2004 11:25 am
564
Hi all, What's a good, common, logic level, low side driver MOSFET available from World Wide Electronics. I'm guessing for 2A plus it would have to be in a ...
... I think BS-170 is available from either RS or Farnell, it's not bad but I'm not sure it's up to what you want. ... Not really. It mostly depends on the on...
... SOT-23 ... power ... Having said all of that, the MTP3055VL at about a buck-fifty is a good standard workhorse. TO-220 package, handles just about ...
Hi Mick Dunno about guru perhaps gu as in half way would be more appropriate I use mtp3055vl. It comes in TO220 flavour. They cost 1.55 and go off 5V Only one...
Chris Holme
cholme@...
Jul 29, 2004 1:53 pm
568
Thanks to both Dave and you, good comments as usual. I'll go and play a little more first. ;) Regards Mick....
... Ummmmmm, I thought the side that the load was switched on determined if it was high/low side driven? As for the circuit, I have a device that has +5 and...
You definitely need p channel mick I missed it before Mtp3055vl will not do Regards Chris Holme ... From: Jean-Michel Howland [mailto:jmh@...] Sent:...
Chris Holme
cholme@...
Jul 29, 2004 2:29 pm
571
What about using an optocoupler chip. Or is that getting complex? Ron ... From: Chris Holme [mailto:cholme@...] Sent: Thursday, 29 July 2004 10:29 PM ...
Just had another thought In order to turn on an n channel mosfet you need to apply a potential to the gate leg that is 5 or 10 volts above the potential of the...
Chris Holme
cholme@...
Jul 29, 2004 2:40 pm
573
I don't see how that would in this case unless I'm missing something? Regards Mick....
... Nah, the phrase refers to which "rail" is switched (interrupted). If the (more positive) rail is turned off (as in your CCT above), it's a high-side...
... Nope. The problem there is that as far as the P-Fet goes, it would see a voltage of either -7V (for a TTL "high") or -12V (for a TTL "low") on its gate...
Mick (and others!) I'm gonna wander off to bed now, but if you need further assistance / commentary, email me at davemr@... tomorrow. I can probably...
... Thank you Dave, that description of the problem and your solution is exactly what I was looking for. I'll go and simulate it now and see how it turns out....
... Assuming you mean "how" as in how to use the opto in that application.... The idea of the opto is to do the level-shifting. You still need a P-Fet on the...
Hi Folks, I'm gonna turf out some stuff that I'm not using any more..., nor likely to use in the near future. I'm not chucking it out in a hurry,... say a...
Just as a clarification... The 65xx serial chip _is_ the 6551. The 65xx parallel chip is the 6522 The micro is the 6501Q I also have lots of motorola 6821 and...
Reminder from the Calendar of mugwa
http://groups.yahoo.com/group/mugwa/cal
Monthly MUGWA meeting
Tuesday August 17, 2004
7:30 pm - 12:30 am
(This event...
Yahoo! Reminder
reminders@...
Aug 15, 2004 11:25 am
585
Chris is planning to demonstrate his PCB manufactureing techniques. For those who did not attend the last meeting, I can't believe that he was able to achieve...
... I'd love to see how Chris does it but I probably wont make it again...My taxi driver <mum:)> is on her last chemo treatment and is still not up to driving....
I had a look at the site that Mick told us about This guy makes it sound a lot more complicated than it really is although I suspect that he thinks he has...
Chris Holme
cholme@...
Aug 17, 2004 2:46 am
588
... Interesting...My boards have always been failures but I don't think I have my times down pat yet. I just bought some of that el-cheapo pcb from WorldWide...
Hello all. Below is a progy I wrote for Sensirion hum sensors. It demonstrates basic use only, only temp and humidity is read, not the crc or the remainder. In...
Chris Holme
cholme@...
Aug 18, 2004 1:24 am
590
Hey all. Well............. last nights PCB demo was less than satisfactory. First, through no fault of any ones except bodgy manufacturers, the brand new tape...
Chris Holme
cholme@...
Aug 18, 2004 1:31 am
591
My commiserations to Chris. I watched him battle valiantly till all hope was lost. The question is. Are we going to have an attempt at another demo next month...
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