✅ - Power issue but can’t resolve

[static wagon]

Hey everyone. I’m motorizing a MK-85 helmet and I am having power issues. I went through a lot of trouble shooting reworking etc. First off is the problem is my servos will not consistently turn to open and closed positions (even with arms removed). I finally noticed if I unplug pin 9 the other servo goes back and forth perfectly. Visa versa I unplug pin 10 and the other turns perfect. Both together though don’t always make to to their positions.

I’ve tried three different power supplies and three different usb cables. One power supply being 5v 3a (so it says). 2 usbs were random ones lying around the third was purchased rated at 5v 5a.

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[sonic snow]

A few things to consider:

• How is your setup wired ? (Can you share a picture)

• Not All USB cables are created the same, some "restrict" the amount of power they can handle since they are only designed for "data". You need to make sure the USB cable you are using to connect the power bank is designed for "charging". Charging type USB cables do not restrict power.

Some Examples of Charging type USB cables:

https://www.amazon.com/dp/B003WV5DMO

https://www.amazon.com/dp/B09Y94B2NM

• Also sometime, even though not obvious, the swtich that is being used can be a problem if it is not a "Momentary / Normall Open (NO) " type switch. Or when using a limit type switch, as found on 3d printers, it needs to be configured correctly:

[static wagon]

Here are the cables and power supplies I’ve tried

2pcs 1M/3.3Ft 20AWG USB 2.0 Male Plug 2pin Wire DIY Pigtail Cable 5V 5A Black USB Power with 2-Position Spring Wire Connector https://a.co/d/7OkzgQX

TCNOLL Portable Charger Power Bank 10000mAh Fast Charging PD 20W USB C Dual QC4.0 Ports 5V 3A External Battery Pack Compatible with iPhone 13 14 Pro Max Samsung Galaxy s23 s22+ Google iPad [2023 New] https://a.co/d/dK1bs7j

Miady 2-Pack 5000mAh Mini Portable Charger, Power Pack with 5V 2.4A USB Output, Power Bank Phone Charger for iPhone XR, 11, 12, Android Phones and etc (Red and Blue) https://a.co/d/14BHQgU

The other power supply I had and was a 5v2amp also and like I said the other usbs were random but multimeter always read 5v I can’t measure the amps though

I can share the wiring tomorrow but I’m fairly certain it’s correct I Redid it a few times even using completely different wires and even mimicked Franks to a T just to make sure when I was stumped.

[modest beacon]

This thread is closed now :white_check_mark: