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Mar 18, 2015 10:25
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Stereotype posted:pro tip: make sure you put your pull resistors near the driver 
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Mar 18, 2015 10:50
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*swipes the direction which means you liek them*
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Mar 18, 2015 13:38
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bobbilljim posted:*swipes the direction which means you liek them* try a diode, it will prevent you from swiping in the wrong direction
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Mar 18, 2015 13:53
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cool things you can do with diodes: - rectify - mix - digital logic - clip - clamp - regulate - illuminate - bias - much, much more truly diodes are great
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Mar 18, 2015 15:20
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As a Millennial I posted:i'm a fan of the sort of diode that emits light. same. i recently bought a few sacks of leds from aliexpress even though i have no plans for them. i just love having a big ol pile of leds
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Mar 18, 2015 16:07
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just regular old visible light. nothing fancy
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Mar 18, 2015 16:08
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EMILY BLUNTS posted:pretend you have a lovely latch on a backyard gate. so you put a little spring on the handle. that keeps it where you want it. this does nothing to help me understand what is going on. I understand having a path to ground to keep the pin pulled low; so that voltage fluctuations caused by various forms of interference flow to ground instead of into the pin. but I don't understand what the resistor is doing, apparently. I thought it was there so the path to ground can be taken when positive is unconnected, but offers enough resistance that the path through the pin has less resistance when positive is connected.
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Mar 18, 2015 16:28
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Alllllllll the 'input pin' is doing is seeing what the voltage is at the top of the resistor. Modern logic circuits have super high impedance and no real _current_ flows through them. They're just sampling. What is the 'resistor doing' when voltage is applied? Turning power into heat. that's it. But it's not dissipating much power, it doesn't gently caress up the high/low switching, and like Physician's Mutual, it'll be there when you need it - when that voltage is removed and you need the input pin to be pulled to 0. So that's why it's there.
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Mar 18, 2015 16:38
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atomicthumbs posted:that handwritten looking electronics book forms most of the breadth and width of my electronics knowledge since i read it as a kid Gazpacho fucked around with this message at 17:44 on Mar 18, 2015 |
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Mar 18, 2015 16:46
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on that note, can anyone recomend a book on ee? itd be hella interesting to read up on that poo poo
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Mar 18, 2015 16:49
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if you guys want we can design a basic amplifier or two in the oscilloscope thread or smth i'll install multisim and take some screenies or even ~~~make a video~~~
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Mar 18, 2015 16:50
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this isn't ee per se but it's a great book about electronics http://www.amazon.com/Practical-Electronics-Inventors-Paul-Scherz/dp/0071771336/
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Mar 18, 2015 16:51
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Dr. Honked posted:this isn't ee per se but it's a great book about electronics i am definitely an inventor Jonny 290 posted:if you guys want we can design a basic amplifier or two in the oscilloscope thread or smth i should start reading that thread again, it made me feel bad about my lack of ee knowledge
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Mar 18, 2015 16:52
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avalanche photodiodes are super cool, powering all our modern fiberoptics and all kind of sensor applications also to get the best sensitivity you have to you use the very cool sounding transimpedance amplifier
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Mar 18, 2015 16:57
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Awia posted:i am definitely an inventor i think you will find it right up your alley. it explains EVERYTHING.
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Mar 18, 2015 17:01
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Dr. Honked posted:i think you will find it right up your alley. it explains EVERYTHING. im reading it now and its good
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Mar 18, 2015 18:02
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Doc Block posted:this does nothing to help me understand what is going on. e: i mean don't even think about the properties of the pin (again, inputs are designed so you don't have to). if you have an SPST switch and a moderate-sized resistor in series across a power supply, the middle node's voltage relative to ground will be the same as the power rail when closed (because the two are directly connected) and zero when open (because there is no current path + ohm's law). Connecting an input pin just measures that voltage. Gazpacho fucked around with this message at 22:18 on Mar 18, 2015 |
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Mar 18, 2015 18:15
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