Need help choosing a microcontroller
I am currently creating the electric circuit for a design team at my school, but I have never worked with micro controllers before. Can anyone recommend a cheap/simple microcontroller to mess around...
View ArticleLED - Resistor Circuit Design Question
I have several types/colors of LEDs, both 3mm and 5mm, that specify a range for Forward Voltage (such as 3.2-3.5V) and/or a range for Current (such as 20-25 mA). I'm using some of the free online LED...
View ArticlePowering a standard LED with 120 VAC
I want to power a LED with 120 VAC. I set up a circuit like the one in the attached file. I sized the resistor with ohm's law. I wanted 20 ma so that means a 6.8 K resistor with a minimum of 2.4...
View ArticleSo, is the idea of retrofit LED bulbs bogus, or is it realy the way to go?
I've heard a number of people say that retrofiting existing lighting fixtures with LED bulbs is not going to be satisfactory. Yet I see a lot on companies beginning to offer LED bulbs with bases that...
View ArticlePlease help...
Can any one please help he how to compile a C program on the ARM processor ?? Thank you very much in advance, Regards,Timothy
View ArticleAO4600 Mosfets equivalent and SMD fuse value?
Hi everyone! I'm currently trying to repair a Samsung Syncmaster 213T.I've successfully changed all the caps and it's working again, but the inverter board doesn't powered correctly the top neons....
View ArticlePowering a standard LED with 120 VAC
I want to power a LED with 120 VAC. I set up a circuit like the one in the attached file. I sized the resistor with ohm's law. I wanted 20 ma so that means a 6.8 K resistor with a minimum of 2.4...
View ArticleSo, is the idea of retrofit LED bulbs bogus, or is it realy the way to go?
I've heard a number of people say that retrofiting existing lighting fixtures with LED bulbs is not going to be satisfactory. Yet I see a lot on companies beginning to offer LED bulbs with bases that...
View ArticleDeath Ray at Hotel
The Vdara Hotel & Spa, a glass structure, famously sprung a death ray that would reflkedct the suns rays and was hot enough to singe hair or melt plastic. Apparently, intense heat is created by the...
View ArticleMounting a MYI, MYD and FRM Files
I received a database I need to restore on my local machine. The database is MySQL off a Linux box, is it possible to mount these files similar to how you would a .mdb file on a MSSQL Server? I am...
View ArticleWhich Capacitors are Best for Power Supply Decoupling
Sorry one more decoupling cap question. When I am selecting a cap and there exist ceramic, tantalum, and electrolytic caps all with the value I need. Which capacitor type is the better choice for...
View ArticleAudio Transformers -- Need a technical Insight.
Hi Folks,I'm a Digital Design Engineer and would like to get some information from some of you guys. As i said i'm into Digital Domain so I know really less about analog and very less about audio...
View ArticlePowering a standard LED with 120 VAC
I want to power a LED with 120 VAC. I set up a circuit like the one in the attached file. I sized the resistor with ohm's law. I wanted 20 ma so that means a 6.8 K resistor with a minimum of 2.4...
View ArticleCut power when voltage drops below a specified level for XBEE S6
Hey Everyone,I am currently working on a device that sends UDP packs from an accelerometer through the XBEE S6. I am using the Sparkfun XBee Explorer Regulated board, the Sparkfun Powerfun LiPo Charger...
View ArticlePlease help...
Can any one please help he how to compile a C program on the ARM processor ?? Thank you very much in advance, Regards,Timothy
View ArticleControlling Stepper with PIC12F629
I am trying to create something like this http://tangible.media.mit.edu/project/inform/ using stepper motor. I have attached hardware structure. Problem that i am facing is am good at arduino but dont...
View ArticleConverting an old lamp to 12v
Hi - I inherited some antique solid brass lamps from India from grandma and well - they need to be completely rewired anyway and I was wondering if I could convert them to 12v and plug them into my low...
View ArticleRemote controlled robot snow plow - DIY + Video
DigiKey uses CUI's VHK200W DC-DC converter to create a remote controlled robot snow plow, the snowbot. Snowbot uses motors pulled off an old electric wheelchair and deep-cycle marine batteries.
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