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7 votes

Battery damaged?

If the battery cost less than the thing you're powering, then you should probably discard the battery. If you're stubborn (or very strapped for cash) and the battery didn't catch fire when the ...
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5 votes

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 ...
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5 votes

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 ...
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4 votes

Crimp or Solder to LiPo Battery?

I find it's always cleaner to use connectors rather than soldering directly to leads, no matter what component you're trying to attach to your robot. You have to think about things in terms of ...
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4 votes
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Arduino Power Supply

There are two main ways to power an Arduino: with 5 volts and with 6.5 to 12. Since your case falls under the 6.5 to 12 option there are two main ways you can get power into an arduino. The barrel ...
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4 votes

Mechanical robustness/shock resistance LiPo batteries

Typically, with LiPo batteries, they don't have a hard case. The hazard comes when the battery internals get dented, which causes the battery to short out internally. LiPo batteries can dump enough ...
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4 votes
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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 (...
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4 votes
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Can too much input current destroy my motor driver?

You are approaching the problem from wrong side. Current capability of a battery (25C) has nothing to do with that how much current will it actually source. It is the load (motors in that case) what ...
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4 votes
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Parallel connection of batteries with equal voltage but different Ah?

You aren't being specific enough. Some chemistries would possibly allow this but others would not. If the batteries have the same nominal voltage than theoretically they should work fine in parallel ...
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  • 196
4 votes
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how to know if the LIPO battery I have is compatible with the motors and motor driver I have

You should check your driver specifications and get the battery accordingly. The driver specs you need to check: Voltage Rating The voltage range that the motor is designed to operate. Within the ...
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How to control ESC from Arduino?

There are quite a few issues I see with your setup. You are setting up the ESC in your code to use pin 9, but your diagram shows that you've connected to pin 8. Pin 8 won't do anything because the ...
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3 votes

How to decide between LiPo or LiFePo for robot battery

Lots of robots safely use LiPo batteries, see almost all multicopter setups. There are plenty of batteries designed for the RC market that are capable of high sustained amperage, along with a plethora ...
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3 votes
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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 ...
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3 votes
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Drone Battery Question

Power Law: Power = Current x Voltage The voltage of the batteries plays a huge difference in whether electronics function properly. Each of them is built to run using a particular voltage - 3....
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3 votes
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Will a 20amp ESC run a Turnigy 2213-980?

In process of selection of components for multirotor, one should start from motor as it is the driving component. Maximum current drawn by your motor is given by manufacture which is 15A. Now your ESC ...
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3 votes

Quadcopter Charging

The best way to manage power redundancy for autonomous systems is a really interesting topic. There are two classes of power needed. Flight and processing. Often the power required for flight is ...
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3 votes
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Tring to run 12 V DC geared motor using Samsung Li Ion ICR16850 batteries

Assuming that the motor is in a healthy condition... Voltage is only one aspect, you have to be sure that you battery can supply the current drawn by your motor. The maximum current, according to ...
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3 votes

Tring to run 12 V DC geared motor using Samsung Li Ion ICR16850 batteries

A fully charged LiPo battery cell should has a voltage of 4.2 V. Assuming that you have three cells in series, that would give 12.6 V. When you apply a big load, this voltage of course, will decrease ...
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3 votes
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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, ...
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3 votes
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How to calculate battery capacity for my robot system

30 minutes is half an hour. 323.344 Watts is approximately 324 Watts. If you want 324 Watts for half an hour, then you want a (324 * 0.5) Watt-hour battery. This assumes, though, that your battery ...
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2 votes

Robot docking for self-recharging

You can detect an IR LED from quite some distance. This is how TV remote controls work. A tiny battery operated LED can send data even when not aimed directly at the TV. The trick is to modulate ...
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2 votes
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Estimation of Battery Life Time From PWM Signals in a Quadrotor

Battery life is generally measured in amp hours. From a PWM perspective, you are pulsing current at a constant voltage, so you could estimate current output to be (duty cycle)*(rated current) where ...
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2 votes

Mechanical robustness/shock resistance LiPo batteries

as @Chuck points out, LiPo cell are sensitive to thermal runaway triggered by mechanical rupture or deformation. An example of a manufactures shock spec can be found here. (They test for a drop onto ...
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  • 4,225
2 votes

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 "...
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2 votes
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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 ...
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2 votes

What charger to use with my ZIPPY Compact 6200mAh 4s 40c Lipo MultiRotor Battery

Buy the imax b6. They're cheap to replace at $26, I would recommend buying the imax b6 with the built-in power supply as it saves you having to buy an extra 12v 5A psu. I own 4 imax b6's and they work ...
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2 votes

When to use multiple batteries vs a UBEC

There are a few things you should consider when designing your system. Motors are usually rated for the stall current, but sometimes generate out-of-spec currents. Higher current draw may happen when ...
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2 votes

When to use multiple batteries vs a UBEC

Any quality power device should list its load regulation capability, which is typically in a datasheet as a voltage range coupled with a maximum output current. You can expect normal voltage ...
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2 votes

How do I if know my quad is powerful enough to take off vertically smoothly and how do I calculate max Thrust(g) for given current(A) and voltage(V)?

You're really asking two questions here: Will the motors and propellers be able to provide enough thrust to lift the weight of the quadcopter? There's no substitute for measurement here. Get one ...
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2 votes

Best power solution for my robot

Regarding the battery requirements, LiPo batteries are probably the way to go, but they do require looking after in order to prevent any nasty accidents from occurring. I looked into this a few months ...
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