# Tag Info

Accepted

### Passing power through a motor

It is called a slip ring. It works the same as a brushed motor. See here for a robotic oriented one. Larger versions handle power, and cost more. Also near field technologies such as those used to ...
• 2,013

### Powering a multirotor with dedicated batteries for each motor

There are a few ways to read your question, but in general what you are suggesting is a bad idea. The only reason to do it would be in the extreme case where splitting a large battery into several ...
• 10.8k

### Does the mAh of a battery mean longer power or more power?

The battery capacity specification (eg X mAh) tells you that your battery can run for 1 hour providing X milliamps until it is depleted. This doesn't always scale with time, for example you probably ...
• 510
Accepted

### Best power solution for my robot

I agree with @Greenonline 's recommendation regarding LiPo batteries along with his warnings on battery care. It seems you will need a fairly small battery, considering your current requirements (...
• 510
Accepted

### How are huge industrial robots powered?

Industrial Robots with having as aim manipulation of large objects are powered electrically in almost all cases (30-40 years ago there have been popular hydraulic variants). Industrial robots are ...
• 6,322
Accepted

### Are robot's codes usually compiled or interpreted?

Robots tend to be portable devices powered by batteries. Portable battery operated devices tend to use embedded processors with limited power and memory. Compiled code has several advantages over ...
• 451
Accepted

### Understanding how solar panels can supply power to robotic circuits

Your scenarios are correct. You can connect multiple solar cells together to get increased current or increased voltage. Wire them in series (positive to negative) to boost voltage, wire them in ...
• 14.5k
Accepted

### How to calculate the power required to drive a fan

This is very rough, might or might not help you.... Treating it as a macroscopic perspective: Kinetic Energy $$E_k = \frac{1}{2}mv^2$$ For working energy in a flow, substitute volume with Area*...
• 158
Accepted

### how to power extra usb devices for beaglebone black

Yes this is pretty easy to solve, you just need basic soldering skills. Just open the cables of your additional USB-devices, you will see 4 wires. 2 of them are for the data, just leave them. The ...
• 1,647
Accepted

### Linear or Switching Power Supply for a Embedded Project

A linear regulator has a major drawback: it dissipates the power it doesn't deliver. Using the well-known 7805, the output voltage is 5V, your input shall be at least 7V to allow a good regulation (2V ...
• 231

### Powering 6 servomotors requiring 6V and 2A each

Search aliexpress for '6V switching power supply'. You should find 5Amp or 10Amp ones for $10-$20. Silver boxes with holes in them. You can find them on ebay as well (usually the same chinese vendors ...
• 4,205

### Can we simulate a actuator with a very strong torque with a PID controller

What you're asking for cannot be accomplished with a PID controller. As I understand your question, you want to be able to choose PID gains that would always produce a "good" trajectory, ...

### Is it possible to use a LiPo charger as a lab bench power supply?

You could trick the charger into providing power for you by applying a voltage to the balance sensing lines. However the control you have over it would be limited. Switching power supplies are ...
• 4,205
Accepted

### Can high voltage power lines provide a super highway for drones?

Sure, a drone can land on a powerline. That's a standard task like the "peg in hole problem" for robotarms. The aim is to maneuver a UAV near to a highvoltage line and eating all the energy. The ...

### Can high voltage power lines provide a super highway for drones?

I think yes it can but how? My options are here: Static system for conventional systems It should stand or hang to line/pole/special place like birds. Please watch video for an example: https://www....
• 1,084
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### Will this have more or less lifting strength

Every action has an equal and opposite reaction. Each motor/joint in a linear chain of actuators (snake) needs to be capable of supplying the appropriate reaction forces. This mean that, if you have ...
• 14.5k
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### What battery capacity would be required to run a component for an hour?

Power (Watts, milliWatts, etc.) is given by: $$P = IV \\$$ where $I$ is current in (milli)Amps, $V$ is voltage in Volts, and $P$ is power in (milli)Watts, respectively. Energy (Watt-hours, ...
• 14.5k
Accepted

### High power jumping mechanism in small robots

Looks like it uses a propane powered ram to launch itself into the air. The end of the piston is visible in the back of the vehicle. This webpage states that source of power is battery and propane ...
• 403
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### How can I power a wheel but let it spin freely when not under power?

You can use a magnetic clutch. When the strain on the horn passes a particular mark, it overpowers the pairs of magnets holding the clutch plates causing it to slip without damaging the gears. You can ...
• 241
Accepted

### beaglebone black power supply for hexapod

18 servos is a lot of power no matter their size but you are going to need to be more specific with what kind of servos you are talking about. That said, this What is the best way to power a large ...
• 217

### Why do my ESCs stop working?

I use those RCtimer ESCs and they have always worked great for me, generally thease (and most) ESCs will be looking for 50Hz pwm with a period between 1-2ms, though generally you will not damage them ...
• 1,909

### Help with ultrasonic sensors on obstacles avoiding robot

Well.. It was a power issue! I'm using one of the arduino replicas and the 5v pins is only outputting 4.5v instead of 5. The problem was solved by providing an external power source. I don't find it ...
• 65

### Calculating thrust generated from electric engines

The easiest way to calculate this will probably be by using the ecalc helicopter calculator, they have done all these calculations for you and take into account far more factors in my experience they ...
• 1,909

### Battery system for a robot with a RaspberryPi or microcontroller

You are right that there are issues in having an "unclean" power supply running into your RaspberryPi. If you are drawing tons of power, things get very hairy very fast. However, there are ways to "...
• 206

### Passing power through a motor

The device you are looking for is broadly known as a slip ring, but since you are trying to power other motors through it you should be aware that a slip ring is not electrically identical to a wire. ...
• 10.8k

### how to power extra usb devices for beaglebone black

Use a self-powered hub. Look at the power adapter from the mains (220v). In almost all instances, it is converting 220vac to 5vdc (sometimes 5vdc and rarely 12vdv). Cut the power adapter cable to the ...
• 161
Accepted

### Powering my robot with 12V battery which is charged by a gas/petrol generator while the robot is operating?

The alternator in a car is constantly charging the 12V battery while the car is running, which is to say battery-wise you shouldn't have any issues. Several things could be meant when you say the ...
• 14.5k

### How to calculate the current consumed by a brushless motor on a quadcopter

n = Kv * Vin only when there is no load on the motor. When there is a load on the motor, like from a propeller, you will need to be a bit more clever. For a DC motor (which BLDC motors approximate by ...