Spider Man Ultimate Power
Harold Yengo
This page contains our spider power meters for road bikes. These power meters measure power at the crank spider (hence the name). You typically keep your existing crank arms and replace your spider or chainring with the power meter (however in certain situations, you replace the crank arms as well). These power meters are very popular. They measure power from both legs, are relatively affordable, are accurate and reliable. In addition, there are models to fit almost any crankset.
This page contains our spider power meters for mountain bikes. These power meters measure power at the crank spider (hence the name). In most cases, you keep your existing crank arms and bolt the power meter spider to your cranks and then attach a chainring to the power meter. These power meters are some of our best. They measure power from both legs, most models are relatively affordable, they are accurate and reliable. In addition, you can find an MTB spider power meter to fit almost any crankset.
We carry spider power meters from power2max, Quarq, ROTOR and SRM. All these companies are highly respected power meter manufacturers. The power meter you select will largely depend on what crankset you have (more on that below).
power2max makes a range of spiders. They offer units for SRAM 3-bolt, Race Face, Praxis, Cannondale, ROTOR, Shimano and e*thirteen cranksets. So if you have any of those, a power2max can be a great fit.
SRM makes MTB power meter spiders for SRAM 3-bolt and Shimano cranks. They are very similar to the power2max units but cost a lot more. For this reason, most customers opt for the more affordable power2max.
The battery type varies across the different models. The power2max NGeco uses a CR2450 battery, while the Quarq uses a CR2032 battery. The power2max NG, ROTOR and SRM units all use a rechargeable battery.
Actually it is a curiosity question, last week I had a gigg with my band in a small festival and the guitarist from another band came along and we started another discussion on amps and guitars. He was quite interersted in my 112 MKII and asked a few questions on pretty much what I'm asking, but all I knew to answer back is what's mentioned in the manual..I felt a bit bad not knowing so here I am!
"The first controls on the back are Power Amp In and Preamp Out. Preamp Out grabs the signal after the Line 6 modeling pre but before the Bogner-designed tube pre." (from : Line 6 Spider Valve MKII 1x12 Combo Amp Review)
To make the question a bit more general, does the channel volume comes from the modeling and the master from the preamp/amp section or does the channel volume affect the preamp as well ? I'm guessing that the power amp part is 100% master volume, right?
Integrating the multiple compatibility, core function, colorful laser stickers with reliable battery life, P505 Spider-based Power Meter will provide a powerful cycling experience, improving your performance in a scientific and effective manner.
I'm building a six-legged spider bot with three 9-gram servos per leg. One hip servo, a knee servo, and one foot servo per leg. That's 18 x 9-gram servos and may want to add a few more before I'm done.
I have selected a 7.2 volt NiCd RC car battery for the power source. This 7.2 volts will go to the Vin of the Arduino Nano and into a buck/boost power supply PCB (model to be determined here). Output of the buck/boost supply will go to the terminal block on the PCA9685 (16 channel PWM board) to power all these servos.
We can't really help you much until you look up the data pertaining to the servo you're using. Since you're using a lipo pack you probably don't have to worry about its ability to draw the current, but may need to consider the amount of time the device will be operational.
Yes but you're forgetting the maximum .75*18 = 13.5 Amp maximum stall current. I don't think you'd ever get anywhere near that unless you parked your robot under a car and tried to lift it, but you should probably add 20% to 100% of your 1.8A to allow for the power required to hold the servos in position even when they're not moving.
Better still, connect a set of three servos, move each of them to a specified angle and measure the actual draw when they're just holding position since it seems that the datasheet doesn't give you clear data for holding current (which will depend on load).
Ooops, I went from 7.2 volts in my head directly to lipo. The load from 18 servos will potentially drag the voltage down noticeably and may result in unstable operation of the Arduino. You'll definitely need at least a capacitor across the power into the Arduino to try and minimize that fluctuation.
Depending on how long you expect your battery to last, I would think that hooking it directly to the Arduino could still be your best option to limit interference from the servos. It would be easy to switch the leads, so maybe try both ways and use the better option.
Your last line... that is where things diverge from reality. The 90 mA is the unloaded current draw... meaning you have nothing attached to the shaft and you make it move to some other location.
@will is right... a serious product company, engineering department would probably be conservative and just take the 750mA multiplied by the number of servos and have that available. A toy company would be have a small fraction of that and let you burn out the servo for built-in obsolescence. A hard-core company like Boston Dynamics would probably rig all the power externally, run all wiring to the bot and test it is all kinds of bad situations and just measure the power needed.
I have ordered an adjustable power supply board that says it's rated at 5Amps. I hope that's enough to get this little guy walking. Not trying to do Boston Dynamics backflips with this one. Thanks for all the assistance and evaluation.
Spider Powers have been a part of the Marvel universe since 1962 when Spider-Man first debuted. The most common include wall-crawling, enhanced strength, speed, agility, reflexes, stamina, durability, endurance, and healing as well as an early warning system officially dubbed the "Spider-Sense" power by Peter Parker.
Almost all Spider Powered individuals have the ability to crawl on surfaces similar to the way a Spider does. This power also helps the user with their sense of balance since they can plant themselves on one surface and stay there.
Spider-Man had the first variation of wall-crawling. It's still a mystery to him as to exactly how it works, but Peter guesses that he can mentally make his molecules bond to any surface. At one time, the supervillain, Electro guessed the power was related to static electricity, and momentarily stymied Spider-Man by using his own electrical power to momentarily cancel it out. At first, when Peter gains his spider powers, he sticks to a wall without even knowing he was capable of that. Very early in the comic book years of Spider-Man, Peter can only stick with his hands and feet. Later on, it is seen that he can stick to surfaces using his back.
The bond is unbreakable, and can be used by any part of the body, including his feet, and allows him to do things, like catching a ball with one fingertip. The suit designed by Spider-Man is thin enough so that he can still stick to surfaces.
Another manner in which a person with spider-powers make crawl solid surfaces is due to talons and embedding them into surfaces. Usually, these talons are strong enough to stab through metal while also firmly holding the wielder onto the surface. For example, Miguel O'Hara uses this to wall-crawl
Several Spider Powered individuals have a "Spider-sense" which is a precognitive ability that warns them of impending danger. Although it is still mostly a mystery, it has proven effective. It works as a tingling/buzzing in the base of the skull when danger is near.
By that tingling's intensity, the severity of the threat can be judged. For instance, a happenstance passing of a potential enemy who is not interacting with the possessor of the power would trigger a slight alert to encourage some caution. By contrast, the presence of an immediate deadly threat, such as a sniper taking aim at the person, the sensation can become severe, sometimes to the point of becoming painful, and can reflexively prompt evasive action in response.
It does not identify the nature of the danger but will indicate what direction the individual needs to move in order to avoid it. It has been known to warn of all forms of danger, from bullets and lasers to tainted meat. The spider-sense power can also locate someone dangerous as Peter once did as Spider-Man to find the Vulture, or when enemies are closing in, or where they are going to jump next. Most spider-heroes integrate their fighting styles with their spider-sense, making them almost impossible to hit with any form of attacks while enabling them to remain mobile and able to choose their next actions and even carry on conversations without fear of being distracted.
This sense is also used in less dramatic situations for other reasons to ensure persons' safety. For instance, the sensor allows safe web-swinging by encouraging consistent hitting safe anchor points for web lines to prevent falls. In addition, the sense also considers serious invasions of the person's privacy as a threat, which enables the possessor to avoid being shadowed or observed changing costumes, thus preserving one's secret identity with considerable ease. Even a completely peaceful situation can set it off, such as playing poker, which makes bluffing the person impossible, and Peter Parker has been informally banned from such games with other superheroes.
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