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Re: Resetting "New Posts"

 by nickersonm ¦  Sun Feb 27, 2011 8:11 pm ¦  Forum: SparkFun Site Questions/Comments ¦  Topic: Resetting "New Posts" ¦  Replies: 5 ¦  Views: 1382

I'm not sure if it's what you're asking for, but there are "Mark forums read" and "Mark topics read" links in the upper-right of the board index and forum index, respectively. These clear the "new post" flag from all posts or all posts in the current forum.

Re: Very Long Range Non-Line Of Sight

 by nickersonm ¦  Mon Feb 21, 2011 8:33 am ¦  Forum: Wireless/RF ¦  Topic: Very Long Range Non-Line Of Sight ¦  Replies: 9 ¦  Views: 2165

If you know it will always be in a suburban area, perhaps you could use a cellular module and TCP/IP? I have not tried anything similar, but it seems to me that it should work if you're in an area that will always have cellular coverage, and are willing to buy a prepaid data plan.

Re: Simple Soldering Question

 by nickersonm ¦  Sun Feb 13, 2011 11:06 am ¦  Forum: SparkFun Product Questions ¦  Topic: Simple Soldering Question ¦  Replies: 9 ¦  Views: 1278

If you don't mind scorch marks, a wooden desk surface is fine. I've done all my soldering directly on a wooden surface, although often the components are suspended and thus not really on a surface. Your desk may experience some discoloration if you apply the soldering iron directly to the surface, a...

Re: Lead Times

 by nickersonm ¦  Wed Jan 19, 2011 5:50 pm ¦  Forum: BatchPCB ¦  Topic: Lead Times ¦  Replies: 13 ¦  Views: 4531

Take a look at the news on the BatchPCB main page: Manufacturer Shutdown Dec 17, 2010 It is the Holiday season again and also that time of year when our manufacturer shuts down for a month. The dreaded Gold Phoenix shutdown starts December 23, 2010 and ends January 17, 2011. We will still be accepti...

Re: Honeywell HSCDANN001BA2A3 Absolute Pressure Sensor

 by nickersonm ¦  Thu Dec 23, 2010 7:23 pm ¦  Forum: New Product Ideas ¦  Topic: Honeywell HSCDANN001BA2A3 Absolute Pressure Sensor ¦  Replies: 8 ¦  Views: 3584

It looks like they output 14 bit data directly, but the specified minimum resolution is 12 bits. I imagine the 14 bit count may vary a bit, or perhaps just be slightly incorrect. I didn't see details in the data sheet. I got 0.244 mbar from the 0-1 bar range, spread over 12 bits (2^12 counts). Since...

Re: Another Alternative to Relays or optoisolators

 by nickersonm ¦  Tue Dec 21, 2010 7:11 pm ¦  Forum: New Product Ideas ¦  Topic: Another Alternative to Relays or optoisolators ¦  Replies: 2 ¦  Views: 942

SparkFun's MOSFET is currently out of stock, but they are a very common electrical component that you should be able to pick up anywhere.

Re: Honeywell HSCDANN001BA2A3 Absolute Pressure Sensor

 by nickersonm ¦  Tue Dec 21, 2010 7:05 pm ¦  Forum: New Product Ideas ¦  Topic: Honeywell HSCDANN001BA2A3 Absolute Pressure Sensor ¦  Replies: 8 ¦  Views: 3584

Perhaps you should check the specifications again. Right on pages 5 and 6 of the datasheet that integ3r linked , it lists the pressure ranges, as I mentioned before. Pmin for all the absolute and gauge sensors is 0 psi. Specifically, the "absolute" series measures down to vacuum without any external...

Re: Honeywell HSCDANN001BA2A3 Absolute Pressure Sensor

 by nickersonm ¦  Wed Dec 15, 2010 3:46 pm ¦  Forum: New Product Ideas ¦  Topic: Honeywell HSCDANN001BA2A3 Absolute Pressure Sensor ¦  Replies: 8 ¦  Views: 3584

Those sensors all go down to vacuum; the "1 psi to 250 psi" in the title of the datasheet are the available ranges, i.e. 0-15psi, 0-1 bar, etc. Pages 5 and 6 of the datasheet have details on that. Output is 12 bits over the range; you could use multiple sensors for better accuracy at low pressures i...

Re: Streaming Wireless Video

 by nickersonm ¦  Sat Nov 13, 2010 12:23 am ¦  Forum: Wireless/RF ¦  Topic: Streaming Wireless Video ¦  Replies: 5 ¦  Views: 982

It might be simplest to use a wireless IP video camera, if it's not too bulky. I believe Linksys and D-link both make wireless-b/g/n cameras with MPEG-4 compression for around $100. You'd probably have to modify the power source to run off a LiPo, but that shouldn't be very difficult, at least not c...