Design

I need information on a projector please
I tried all sort of G120's and did no like the response time. I mean they are great and work fine but bulky and sort of slow. I looked around at a bunch of stuff coming out of China and they worked well but only for a short period of time then they sort of poop out and die lol...costly! The reason I started to l... 31 Mar 2010 14:22

Automate turning of manual rotary switch?
Got a little problem. I've been asked to come up with something that turns a manual 3 way rotary switch from one position to another and back again under software control. The switch is one of those bulky things with a pointer style knob. They basically want to control a piece of equipment without modifying it ... 5 Apr 2010 22:49

Turn your Rigol DS1052E Oscilloscope into a 100MHz DS1102E
For those with a Rigol DS1052E oscilloscope, you can now turn it into a 100MHz DS1102E with just a serial cable: http://www.youtube.com/watch?v=LnhXfVYWYXE Dave. -- ================================================ Check out my Electronics Engineering Video Blog & Podcast: http://www.eevblog.com ... 11 Apr 2010 16:48

Line voltage north-eastern Australia?
Gents, A product is going to be test marketed in Australia, northern half of the east coast. We know the line voltage there is 240V/50Hz but not which tolerances apply. The upper limit is important to us, and also whether it tends to exceed whatever the standard might say. Can someone elucidate? -- Rega... 1 Apr 2010 14:38

PLL Loop filter
This PLL loop filter is used with current-output charge-pumps: GND === .---. | .-| Z |-. --- | '---' | --- | | i_N | ___ | |\ | -->----o---|___|--o--|-\ | ___ | >-o--- -->----o---|___|--o--... 30 Mar 2010 19:34

Multiplex your inductor
I missed this when it first came out in 2004 - TI introduced a four-output SMPS chip meant for cell phones, very small, and to even further save size, it required only one small inductor. The secret? Multiplex your precious inductor cycle-by-cycle, among three outputs! Create +5, +20 and -18, all from on... 31 Mar 2010 22:10

Ceramic Capacitor Failure
I've got a situation where boards are being returned all of the sudden. This particular board has been in service well before my time so it seems as if it is perhaps related to a particular batch. The problem is with an 0805 ceramic capacitor. The same capacitor seems to have failed on each. The result is a 56 ohm DC r... 1 Apr 2010 11:15

Getting a 433MHz antenna going
Every now and then you find something new on your path... I'm working on a wireless device which is going to use a PCB trace as an antenna. The bitrate is quite high (approx 250kbit) and we decided to use the 433MHz band because it has little restrictions. The main problem is the antenna. I managed to put a 115m... 2 Apr 2010 01:44

More items that don't deserve patents
--> http://www.rfglobalnet.com/article.mvc/Mini-Generators-Could-Power-Wireless-Sensors-0001?user=1925643&source=nl:27130 Quote: "The researchers have built three prototypes and a fourth is forthcoming. In two of the generators, the energy conversion is performed through electromagnetic induction, in which ... 31 Mar 2010 21:03

Internet via Cellular
"mpm" <mpmillard(a)aol.com> wrote in message news:b7cdc437-ece6-419f-9f75-94cf2f1da42b(a)y14g2000yqm.googlegroups.com... Is anyone else worried about what might become of the cellular/PCS airwaves now that the iPhone (and other popular smartphones) are taking over? Not really. Are we going to turn the ai... 30 Mar 2010 13:53