Q: What about safety? We’re in the higher-voltage regime here, right?Ī: Yes, there are safety issues. This complicates the driver design and topology but is a solvable problem To meet the need for high-performance voltage drive for the piezoelectric element, there are vendors who offer high-voltage op amps in monolithic and hybrid form which can deliver the voltage (and current) needed and can drive the highly capacitive loads.Ī: Of course! The piezo element is “floating” (not ground referenced) so the driver must have a differential output with no reference to system ground. Q: Are those the only driver-design options?Ī: No. Thus, the drive problem has two parts: providing a DC supply of high-enough voltage, and then developing a high-voltage amplifier which operates from this supply to drive the element. Providing this high-voltage supply can be a challenge, as most basic AC/DC or DC/DC converters produce a much lower-voltage rail at up to several tens of voles. This load may range as high as 1000 nF.Ī: No, regardless of the approach used to build the analog high-voltage driver, the driver itself needs a high-voltage DC rail as its supply. Note that the piezoelectric element looks like a capacitive load (again, in contrast to the inductive load of a motor and its coils) so the voltage driver must be designed for supporting capacitive loads without concern for oscillation or stability issues. Another option is to use a standard lower-voltage op amp but with voltage-boosting transistors (usually bipolar, sometimes FETs) on their output. This works well for small elements such as used in tiny positioning devices (or even piezo-based sounders/buzzers, which are “crude” but effective and widely used). Q: How do you develop such a drive voltage?Ī: At lower voltages, in the tens of volts, standard op amps may be suitable if their process is a higher-voltage one. Fig 1: This piezo-drive waveform is designed to optimize performance for a specific inkjet-printer printhead. The associated current can be in the range of a few mA to several amps. Of course, there is a current which accompanies a voltage any real time work is done (in the physics sense, as is the case here) but voltage is the controlling parameter. In contrast, the piezoelectric crystal needs to see an applied voltage, and it is this voltage which determines and drives its action, Figure 1. The ideal motor-drive is a controlled current source, although it can be approximated by a voltage source driving that current. Even though the design engineer may be thinking in terms of applied voltage, it is the current through the coils that the motor “sees” and actually creates the magnetic force, regardless of the drive voltage pushing that current. Q: How does this differ from the drive of a conventional electromagnetic motor, whether AC, DC, brushed DC, or brushless?Ī: All of those motors are current-driver actuators. Q: What are the drive requirements for a piezoelectric element?Ī: It takes an applied voltage, ranging from 30 V to hundreds and even thousands of volts depending on the crystal size, desired elongation, and other factors. Part 2 looks at their drive requirements, which are very different than those of “conventional” motors. Part 1 of this FAQ looked at the moving piezoelectric element of the actuator. Unlike better-known electromagnetic motors, the widely used piezoelectric-based motor/actuator provides precise, repeatable linear motion over short distances, and requires a voltage drive rather than a current drive.
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I’m not sure if that gap is disappointment or just a nagging feeling that it wasn’t supposed to be this way, and I’m not sure if it says as much about Kevin Durant as it does about the rest of us. All of these assessments are slightly strange in their own ways, and while hyperbole is the coin of the realm in such spaces, the reflexive nature with which they are delivered seems to betray a widening gap between what we’ve long expected that Durant’s historical footprint would be-something epochal and undeniable-and in 2023, what it is actually shaping up to: something more ungainly and complicated. 1 1 0 H2H Stats Preseason Phoenix Suns Denver Nuggets WIN 60.0 40.0 Home WIN 80.0 60.0 Away WIN 40.0 20.0 Points Per Game 113.2 112.6 Home Points per game 119.0 112.0 Away Points per game 107.4 113. Still, Nuggets coach Michael Malone isn't convinced that's an advantage. If, like me, you listen to an unhealthy amount of NBA podcasts, you’ve probably heard Durant described incessantly as a top-12 player of all time, the greatest offensive player ever, the most malleable superstar in the history of the sport. Because Boston was able to come back from a 3-0 deficit to force a Game 7, Denver will have seven more days of rest than Miami. The frequent trade speculation around Durant in recent years has led to incessant appraisals of his place in history among the basketball pundit class, always drenched in superlative. There are three MVPs trophies between the two teams and so many big-time shot makers you’ll lose track of them. The top-seeded Denver Nuggets are headed to their first NBA Finals in franchise history and will face the surprising eighth-seeded Miami Heat, who have surged back to the Finals via the play-in. Match Details Fixture: Phoenix Suns vs Denver Nuggets NBA Las Vegas Summer League 2021. This is two absolute offensive juggernauts who have bad matchups against each other all over the floor. Vogel's goal for Suns: 'Take the league by storm' 5d From 'The Big A' to 'Playoff Jimmy': Top 25 performances in NBA conference finals history. The Team Trying Very, Very Hard to Be the Worst in Baseball History Matt Moore Updated: Apr 29, 2023, 09:53 AM EDT Download App This might be the best series of the playoffs. The first is a family plan that costs $100 for up to five phone lines, a deal sweetened even more by the pledge to knock $5 off the total when you pay your bill automatically online. Prepaid carrier Cricket Wireless is rolling out a handful of new perks to customers starting this Sunday. All information is presented without any warranty or guarantee to you. It is possible that your actual offer terms from an advertiser may be different than the offer terms in this advertising widget and the advertised offers may be subject to additional terms and conditions of the advertiser which will be presented to you prior to making a purchase. Even though the commercials might be annoying, there are some delightfully inexpensive Cricket Wireless plans. Cricket Wireless specializes in affordable plans with a good network provider. We make reasonable efforts to ensure that information in the featured advertisements is up to date, each advertiser featured in this widget is responsible for the accuracy and availability of its offer details. Decem4 min read Share Article We may earn money when you click our links. While we strive to provide a wide range of offers, this advertising widget does not include information about every product or service that may be available to you. You will not be charged for engaging with this advertisement. r/CricketWireless is an unaffiliated community, we welcome all positive and negative feedback, but please be articulate in your complaints.This advertising widget is powered by Navi and contains advertisements that Navi may be paid for in different ways. Try out unlimited 5Mbps 2-3Mbps over Sprint network for 50$/mo at /r/yourKarma. Tired of too many rules? Don't care for voice? Want a simple unlimited WiFI hotspot? A big fan of Swiss cheese? Like proprietary and unportable hotspot devices and a lack of BYOD support? Alright guys let me dive in and explain to you all of the juicy details behind this Cricket Wireless 4 LINES OF UNLIMITED DATA FOR 100 - EXPLAINED video. The 128kbps downstream throttling is too slow? Don't care about uploads? Activation fees are too confusing? Late fees are too odd on prepaid? AT&T network sucks? 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A set amount of high-speed usage is offered each month as part of a data bucket (e.g., 2.5GB 40$, 5GB 50$ or 10GB 60$), subsequently, all downstream data gets throttled at 128kbps downstream after your original data bucket is exceeded (unlike on T-Mobile, the Twitter uploads do still work on Cricket Wireless even after the throttling, since the throttling is only applied to the downstream traffic!). See for frequency details for each network.Īll data plans include 4G LTE access (throttled to 8Mbps), HSPA+ access (throttled to 4Mbps) and UMTS, and GSM/EDGE access. Note that GSM/EDGE is in the process of being completely shutdown by 2017, and may already be refarmed to HSPA+ or LTE in some spectrum-constrained regions. Service is offered over GSM / EDGE, UMTS / 4G HSPA+ and 4G LTE networks. SAVINGS: On an unlimited plan, get 4 lines for 100/mo. Cricket Wireless, formerly Aio Wireless, is an AT&T-owned AT&T MVNO. The other day I was questioning if ice cream season is still going on…then I drove past our local ice cream shop and it was PACKED.Timing is everything in healthcare - yet too often diagnoses, treatments and procedures are held up by paperwork, administrative red tape between patients, clinicians, carers, bookkeepers, insurance companies and others in the chain of relationships that needs to be processed before steps can be taken. Since everyone has to stand 6 feet apart these days, the line was almost around the block. So yeah, I think ice cream is still going strong, which means it’s time for one more ice cream recipe before summer ends and fall squash takes over. Maybe I’ll just make a spaghetti squash ice cream and keep summer going the best I can. So I’m about to take a SHARP left turn on ya. Over the weekend, I had the house ALL to myself while my husband was away on a bachelor’s party. Mostly because I could watch all the true crime documentaries I wanted. My isn’t much of a true crime fan…or really a documentary fan. He falls asleep in 46 seconds as soon as I put a documentary on. And this weekend I finally watched The Murder of Laci Peterson on Hulu. Before I thought Scott Peterson absolutely did it, but then after watching this documentary, I was reminded that I had the viewpoint solely based on what the media had said.Īnd it has me looking at life from a totally different angle. I knew nothing about the trial or details from both sides. I based my opinion on what the media said and that was that. But now, after watching that podcast, I really have no clue. And I don’t think I should have an opinion because of it. It was just such an interesting moment because really no one knows if he did it or not, but people don’t like the unknown so they just make the decision for themselves in order to not feel uncomfortable. The only person who I would trust to tell the truth is McKenzie, since she was the last one seen with Laci. Dogs are the only people I trust, anyways. Ya know? I know the last thing you wanted to talk about was murder while thinking about ice cream, but here we are.Grab the old ice cream maker and get ready to enjoy delicious Rocky Road Ice Cream, bursting with marshmallows, chocolate chips, and pecans! When will Elon Musk create a way to translate dogs thoughts? Come on, man! Anywho, it was a great reminder that as humans we hate the unknown, but sometimes we just gotta get comfortable with knowing that we don’t know. Who wants some Rocky Road Ice Cream? This yummy ice cream is a personal favorite of mine. It doesn’t matter if it is hot or freezing cold outside, I will always enjoy a scoop of this ice cream, if offered! Today I want to share a wonderful recipe for homemade rocky road ice cream. Scroll Down For A Printable Recipe Card At The Bottom Of The Page Time For Homemade Ice CreamĪs the weather here in Oregon has begun to warm up, I’ve started getting excited to prepare homemade ice cream! There’s just something about enjoying a cold dish of homemade ice cream on a warm night! It tastes wonderful, and is easy to prepare. I get inspired to drag out my trusty, beloved Cuisinart ice cream maker and get busy in the kitchen! It’s been fun making ice cream using this machine, because you do not need rock salt OR ice to freeze the ice cream. I found this delicious recipe for homemade Rocky Road Ice Cream online at “Taste Of Home”. Because of those yummy ingredients, it’s a real taste treat! How Much Rocky Road Ice Cream Will This Recipe Make? The recipe sounded pretty “spot on”, so I decided to give it a try, and now it is one of my favorite homemade ice creams! Rocky road ice cream is a chocolate based ice cream, packed full of marshmallows, chocolate chips and pecans. The original rocky road ice cream recipe makes just over 4 quarts (using a standard sized ice cream maker). Those are the ingredient quantities I have listed here in the printable recipe below. If you want to make the full recipe, simply refrigerate the extra until ready to freeze another batch later in the day or the next day! When I made this rocky road ice cream, I simply halved the recipe to work in my smaller indoor ice cream maker. Hope you enjoy making some great homemade ice cream this summer! It’s very simple to make, and is always a big hit with everyone who tries it! Have a great day, friends. Make it a GOOD one! Please come back soon for more delicious recipes. You can find all of my ice cream recipes in the Recipe Index, located at the top of the page. I appreciate you using some of your valuable time to do so. I would be honored to have you join our growing list of subscribers, so you never miss a great recipe! If you’re interested, I publish a newsletter 2 times per month (1 st and 15 th) with all the latest recipes, and other fun info. |