Design

How does the stylus on a Toshiba tablet work??
Any ideas? Tried google without success. The screen senses the stylus from a 10mm+ from the surface. The stylus also has an erase function so I imagine the stylus has an active component to it. ... 5 Feb 2010 15:05

Helping with TI's XTR117 ??? (SON8 DFN package)
Fred Bartoli wrote: It's a primer for me, but it had to happen one day or another... I've a product designed and working using one such small 4-20mA IC for a customer (a one manned business). The customer manages the subcontracted production and also managed to get short of those XTR117, which ... 4 Feb 2010 20:15

Current divider mirror
I need a current mirror that has a current coming in from +V or -V, reproduces that current from +V, and produces a current to -V which is about 0.1 to 10 times the input current. I'd just do it with one of those ten emitter transistors that ICs are so fond of using, but they aren't variable geometry... Tim... 9 Feb 2010 19:42

CD4060B?
Does the CD4060B need a reset every 2^14 counts if I am using it as a 1/2^14 frequency divider? Thanks, Chris ... 4 Feb 2010 00:07

Small genset
Hi Joerg, Joerg wrote: D Yuniskis wrote: I want it to be smaller than the battery. It can't be too small or you can't hold/mount it properly anymore. My original plan was to mount it and battery in a single enclosure. Saves connectors, etc. Remember, size + weight aren't your friends when you do... 4 Feb 2010 20:15

XO controlled 480Hz Oscillator
What is the simplest way to get 480Hz from a crystal controlled oscillator? Looks like most of the pre-packaged XO's and VCXO, seem to put out much higher frequencies. Would a series of dividers be the best way? Thanks, Chris KQ6UP ... 23 Feb 2010 15:52

The UT804 bench multimeter
The UT804 bench multimeter.. It's got Farrari racing red! Ebay item 270516514042 http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=270516514042 But it's $275 with free shipping off Ebay.. :( mmmmmm imo it's got a beautiful front panel design including the display. I might buy it. -- D from BC British... 4 Feb 2010 21:22

Linux sucks
http://www.abvolt.com/misc/A330-200_Linux.JPG This is the TV console of A330 en route from Amsterdam to US. No movies for the whole plane. However, watching their attempts of rebooting it for an hour and a half was kind of entertaining :-) BTW, the TV remote control had some bugs as well. Vladimir Vass... 10 Feb 2010 21:21

Simple crank powered USB phone charger?
Hello, I would like to build a simple crank powered USB charger. I have very little experience in electronics, but I think this is how I would do it: http://docs.google.com/View?id=df4479zw_145npdcsbmj Any guidance concerning components types/specifics and general design would be greatly appreciated. Thanks a lo... 11 Feb 2010 20:44

Efficiency of power supply circuit (rectifier + filter section with load)
On Mon, 1 Feb 2010 02:21:36 -0800 (PST), Myauk <aungkokothet(a)gmail.com> wrote: Hello All, I am calculating an efficiency of full wave bridge rectifier after step-down transformer with a filter capacitor used. I am looking a circuit as simple as this: http://www.electronics-tutorials.ws/diode/diode23.gi... 2 Feb 2010 16:28