# Back emf and basic ESC

**URL:** <https://discuss.bluerobotics.com/t/back-emf-and-basic-esc/5916>\
**Category:** General Discussion\
**Tags:** ardusub\
**Created:** [September 2, 2019, 12:38pm UTC](https://discuss.bluerobotics.com/t/back-emf-and-basic-esc/5916 "2019-09-02T12:38:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sudheeshk](https://avatars.discourse-cdn.com/v4/letter/s/71c47a/32.png) [@sudheeshk](https://discuss.bluerobotics.com/u/sudheeshk)\
**Post date:** [September 2, 2019, 12:38pm UTC](https://discuss.bluerobotics.com/t/back-emf-and-basic-esc/5916/1 "2019-09-02T12:38:35Z")

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hai everyone, i am trying to operate my ROV using an external power supply. but the problem is, the power supply module frequently restarts during the operation. i doubt on the back emf produced by the thrusters since the power supply has protection feature… i am using bluerobotics basic ESC. can anyone suggest a solution?

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**Author:** ![adam](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/adam/32/9438_2.png) [@adam](https://discuss.bluerobotics.com/u/adam)\
**Post date:** [September 3, 2019, 10:50pm UTC](https://discuss.bluerobotics.com/t/back-emf-and-basic-esc/5916/2 "2019-09-03T22:50:16Z")

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Hi @sudheeshk,

Please see the following topics:

[BasicESC and Reverse Current](https://discuss.bluerobotics.com/t/basicesc-and-reverse-current/4070)

[New Basic ESC r3 on power supply (no batteries)](https://discuss.bluerobotics.com/t/new-basic-esc-r3-on-power-supply-no-batteries/2066)

The information there should answer your question. You can make your own fork of the BlHeli\_S firmware that has active braking disabled, try a capacitor bank/filter, or use a different ESC.

-Adam