The discoveries of an Electrical Engineer. Maybe you’re learning about filters and want to see the how your filter responds in the 10Hz to 1MHz range. This guide will show you how to make a low frequency Tutorial how to create assembly for chain model using Pro/Engineer WildFire 4.0 Here is link to ProE files: http://rapidshare.com/files/442582436. Name Last modified Size Description Bio-Informatics/ 22-Aug-2016 07:25 - Computer-Security/ 22-Aug-2016 11:14 - Hacker/ 22-Aug-2016 08:35 - Hacking/ 22-Aug-2016 09:42 - Hacks/ 22-Aug-2016 11:14 - Linux/ 22-Aug. A database of ready installation logs made by Revo Uninstaller Pro team to unsintall your programs. Sitka Medical Center is a subsidiary of SouthEast Alaska Regional Health Consortium (SEARHC). Direct download latest PC SKIDROW, Reloaded, Codex Games, updates, game cracks, repacks. Skidrowcrack.com provides Direct Download and Torrent Download for latest PC cracked games. Leslie's Pro has many locations throughout Phoenix metro area. Provide a-z parts, supplies and care tips for swimming pools and spas. The discoveries of an Electrical Engineer. December 2. 6, 2. Simulation of changing - 2. This is a topic that’s very simple, but I’ve seen individuals do it in ways that are really over complicated. My example will show how to measure from - 2. Analog Digital Converter (ADC) with an analog reference of 5v. The micro controller for this example will be an Arduino since it’s easy to get up and running. If you are having issues with selecting resistor values for your situation, leave a comment and I’ll help you out! Design and deriving the equation: Circuit and deriving the equations. This is a circuit that’s basically an addition to the simple voltage divider which gives one the ability to measure high voltage ranges using an ADC with limited voltage ranges. I’m going to be using a voltage divider that starts out at half the Vdc, which is 2. Arduino’s 5. V power. From there I’m going to use a higher valued resistor to pull the 2. If you wanted to measure just negative voltages then get rid of Rc (use infinity in the equation). Equations required with explanation. For deriving the equation, I just used nodal analysis. As you can see there is no calculus or anything very math intensive, but there are some variables. This isn’t a guide on circuit analysis, but if you need some tutorials on signal analysis look around youtube or try the book – Schaum’s Outline of Basic Circuit Analysis. Just as a warning there are a similar methods of doing nodal/mesh analysis that will get different equations but yield the same final equation. Note: Vout is the output of the resistive divider, which will be what’s connected to the Arduino’s analog input (ADC). Vout should only go from 0- 5v. Vac is the input to the overall circuit which may vary from positive to negative voltages. Vout may be found by using 5*(double)analog. Read(pin)/1. 02. 4. Usage notes: This isn’t a volt meter! If you build it and you’re not measuring a voltage, you’ll notice that it reports a few volts although nothing is connected. Connect Vac to Ground and you should get close to zero volts. As you can see the example above is fairly low impedance, but you can use higher resistors. The two resistors standing up are both 1. Two 1. 0k resistors in parallel are equivalent to 5k. Red wire running off of picture is Vac and black is ground. RapidShare, one of the first file hosting services on the Internet, is shutting down next month. After March 31st, all of its user accounts and data will be deleted. As for problems: the only thing I can think of is if the ADC wasn’t giving off good readings. If you’re measuring something that’s time critical or behaves sinusoidally, don’t put any capacitors on Vout since this will do a phase shift on Vout. If you’re worried about voltage spikes then you could use two zener diodes facing oppositely. Also remember that in this example the voltage spread is over 2. ADC that’s 4. 8/1. Example code and material: Voltage equations from above (pdf)Arduino example program (pdf)I was going to use this for a 3 phase triac driver with simple pwm. I needed a zero volt detector on one phase which would allow me to calculate the other phases and trigger the triacs at the right time. Originally I was going to sample the voltage with the ADC and look for about 2. ADC. I ended up using a simple voltage divider and a comparator which is definitely a better route! Now you can measure negative voltages with your ADC or Arduino! Reverse Code Engineering. Download pro/e wildfire 5.0 from: http:// download the patchs and liocence file in following link: https://rapidshare.com/files/45850166.
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