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pdx-robotics / Arduino_KHR-1

Control KHR-1 with Arduino
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Determine powering method and how to equip on KHR-1 #18

Closed Chana030102 closed 6 years ago

Chana030102 commented 6 years ago

[2018/10/09] Determine a powering method that doesn't restrict KHR-1's movements. It should be something that provides sufficient power.

Determine if 4 AA batteries will be sufficient enough in powering all 17 servos. Once a sufficient powering source is determined, figure out how KHR-1 will carry the power source.

Chana030102 commented 6 years ago

We tried a battery pack that rated at 6V and 750mah. It performed rather well and seemed to provide enough current to hold torque on 16 servos. It consisted of five 1.2V batteries that can be found at the following website: https://www.batteriesplus.com/battery/rechargeable/2_3a/nickel-cadmium

Power method with AA batteries still needs to be experimented with as an alternative method.

jakechung42 commented 6 years ago

This is the one that we don't know how to charge it right?

Chana030102 commented 6 years ago

@jakechung42 This is to determine a powering method that doesn't require a power supply and a way to equip said method onto him so he can walk around with it.

jakechung42 commented 6 years ago

@jakechung42 This is to determine a powering method that doesn't require a power supply and a way to equip said method onto him so he can walk around with it.

yeah but I'm asking about the battery. I remember we tested some battery but we couldn't figure out how to charge it.

Chana030102 commented 6 years ago

Yes, that's noted in this comment. We haven't figured out the proper way to charge it (if there is a proper way at all).

jakechung42 commented 6 years ago

@jakechung42 This is to determine a powering method that doesn't require a power supply and a way to equip said method onto him so he can walk around with it.

yeah but I'm asking about the battery. I remember we tested some battery but we couldn't figure out how to charge it.

if that is the case that it is the batteries that I remember, I think I might look into how to charge it or to build a charger for it.

jakechung42 commented 6 years ago

I'll put this on the potential replacement list. I think we should try to get the one that we have to work first. If that doesn't work, we'll look into this solution.

williamVbrines commented 6 years ago

The stance on this issue has been changed so that having a tetherless way of powering KHR-1 is not a priority nor a needed for KHR1. Thus a way of powering KHR1 has been devised through the use of an RTX Powersuply.

This Issue will now be closed until the need arises for KHR1 to walk freely.

If the need arises the following methods are suggested.

4 AAA Alkaline batteries. due to there capacity volume and there internal resistance at high currents. 1 3.3 volt coin cell for the Arduino.

If the use of rechargeable batteries are warranted then a buck-boost converter should be installed in KHR1 due to rapid decreases in voltage over time.