Home work help!!!
Updated: 2012-02-06 21:16:34
I need help desinging this circuit on paper so that I can build it in multisim and on a bread board for my digital circuit class. Please let me know...
Convert LCD readout to LED?
Updated: 2012-02-06 20:12:04I was wondering if or how you could convert a cheap LCD display (in this case of budget-priced machine tool DRO displays) into an LED/luminescent...4-QAM Constellation Diagram
Updated: 2012-02-06 19:20:25Hello, Below I'm attaching the preview picture of two constellation diagrams for 4-QAM modullation: ...Electronic candle protects sleeping infant
Updated: 2012-02-06 18:49:38
[William] developed this temperature candle as a tool to help keep babies safe as they sleep. It seems that ambient temperature has an effect on Sudden Infant Death Syndrome (SIDS). This device is meant to alert you when room temperature is outside of the recommended envelope. The board hosts an eight-pin PIC microcontroller (12F683P), a [...]Schematic from a 1935 Bally Payout Pinball Machine
Updated: 2012-02-06 18:28:35I have this great old game and the schematic for it is attached. It is a simple circuit but I can't figure out how/when the the highlighted relay...holding capacitors for a 150 hp dc motor
Updated: 2012-02-06 18:10:23I have a 150 hp ~ 180 amps dc motor 600 to 675 volts. If power is lost I need for the motor to continue to run, with load for 1/2 second. Until ups...sound to light kit mod
Updated: 2012-02-06 18:03:27Hello, First time posting here. I'm an amateur at best with electronics. I have this Velleman MK103 sound to light kit. I have replaced the red...What is miller effect?
Updated: 2012-02-06 18:01:391. What is miller effect. 2. Do it only applies in non inverting opamps where feedback cap is millerize into Cinput & cout. 3. Or its an general...Calulating gate capacitance other parameters of mosfet from datasheet
Updated: 2012-02-06 17:55:31I have to calculate gate cap, now I got two methods, one is by looking at Vgs vs Qg graph & directly calculate Cgate = Qg/Vgs. Second is finding...Theory question about power lines
Updated: 2012-02-06 17:40:42It seems that long distance high voltage DC power lines are possible and indeed are being used over 600km according to wikipedia, which goes on to...Help - Relaying a switched motor
Updated: 2012-02-06 17:19:04Hi I'm busy rebuilding my father's car and the window winder cables and connectors are a bit old. They work fine but very very slow due to voltage...Which type of Relay to Use???
Updated: 2012-02-06 17:11:48Greetings to all Readers, Here is a PCB and a Schematic of a Soft Start circuit board for Toroidal Transformers. I have managed to figure out all...DC fan controller modification
Updated: 2012-02-06 17:07:46Hello! I have a problem with a fan controller. The controller is able to regulate the voltage to the fan from 7 to 15 volts DC (speed regulation)....Transformers & Frequency Converters
Updated: 2012-02-06 16:47:37I have questions about transformers and frequency converters. First, I think I have a decent knowledge of how transformers work, but there is one...A Scanner, a Calculator, an Atari, and a Hard Drive Walk into a Karaoke Bar…
Updated: 2012-02-06 14:00:27DIY projects, how-tos, and inspiration from the workshops and minds of geeks, makers, and hackers @ Make: magazineHardcore Storage from Swiss Army
Updated: 2012-01-19 18:53:12All tools. All the time. Your source for news, information, and reviews of hand tools, power tools, and tools of all kinds.Workbench Spot Light
Updated: 2012-01-16 01:04:49
The camera I added recently gained a new boom mounted partner, a Luxeon Rebel powered spot-light. Consisting of three 200+ lumen neutral-white Rebels, the spotlight puts a lot of light onto a spot on the workbench. I’m going to pick up a diffuser optic for the collimator so it’s not quite such a tight spot. [...]Fresh PCBs
Updated: 2012-01-16 01:04:47I just received these FedEX on Tuesday, fresh from China via Colorado. The first stack of boards is the prototype taillight driver, sporting a tilt switch for motion detection. The second board is a pretty similar design, with a bigger inductor and more compact layout. The intention here is to run a trio of Lumiled’s [...]