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When looking at reference designs for power regulators (LDO/Linear, switching, etc.) why are the input and ceramic output capacitors generally a 1206 case size? I can find a capacitor that is 0402 or 0603 with the same/similar voltage and ESR, the only difference I see is the temperature (X5R...
Parden my ignorance, but how does the bjt protect the mcu, and how many mA will it take the mcu to drive the bjt? It only takes 10 mA to drive the phototriac.
Thanks
Thanks for your reply. Are you saying the protection is provided by the phototriac, or by adding a bjt between the phototriac and the digital pin on the mcu?
Re: Using an optioisolated triac with an MCU
I was trying to keep the component count and cost down, and I was hoping not to have to use one. Is it bad practice to connect a MCU digital output pin directly to a LED or similar device?
Re: Using an optioisolated triac with an MCU
After looking at the datasheet again I think the I-hold it is referring to is the minimum current that the out put load needs to sink in order to keep the triac on. Is This correct?
Using an optioisolated triac with an MCU
I am designing a project that switches ac loads using a micro controller. I have never used triacs before, but i decided the best route to go was to use one that is optically isolated. The device I am currently considering using is a VO2223A...
I have been looking for a three axis gyroscope, nice find!
Do you have the data sheet? (**broken link removed**)
It appears to have several serial interfaces, what kind of interface are you talking over, and what application/device are you using it in?
Several companies make them, as previously mentioned ST, and other companies like Analog Devices and Freescale Among others. If you are looking to buy 1 or 2 of them, I like to use www.sparkfun.com. They keep a bunch of stock on Gyros and Accelerometers for products that they design, and they...
I have been using Eagle off and on for about 3 years, and in that time, I have learned how to make basic devices. I am trying to make a device that is a little more complex than what I am used to (256 BGA), and in doing so I have discovered what eagle calls gates. My new device consists of 1...
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