@kashyyyk,

If you are using a power base, there is a 20 amp fuse

Fuse Replacement Lesson: https://synthiam.com/Community/Tutorials/47

If both motors pull more than 20 amp, you will end-up replacing the fuse.

There are other issues like wire gauges, you need to have proper wires to handle the motor amps.

My recommendation is to have separate circuits EZ-B and motor h-bridges.

you need to pickup the right wire gauge, and a fuse block something like this:

https://www.superdroidrobots.com/shop/item.aspx/atc-blade-fuse-block-4-circuit/1837/

The supply voltage for your motors pulling up to 43 amps should be supplied from a power source capable of supplying the peak 43 amps needed. Do not channel this amp rating through the EZB. 20 amps total for all devices is recommended. There's a protective fuse that will blow it you exceed this rating. However it looks like the logic part of this h-bride is 3.3-5V. This voltage might be able to be supplied by the EZB directly or channeled through it.

Actually a small correction here. The ezb4 can supply 5 amps continuous through the digital power pins with the occasional current spike of 20 amps... Either way, power your H-bridge directly from a battery or power source... EZB4 specifications PDF

Happy New Year!

Ok thanks! I'll power them through a fuse panel.

Once I get it wired, I know I will have script questions.

@RichardR

Quote:

Actually a small correction here. The ezb4 can supply 5 amps continuous through the digital power pins with the occasional current spike of 20 amps

Thanks, and i believe can be very relevant.

I missed that point, I wrongly assumed the VIN is connected to the Digital Ports Red Pin.

back to the lesson: https://synthiam.com/Community/Tutorials/163/3

Quote:

The "maximum" continuous current draw through the EZ-B v4, is 5 amps. (limited by reverse polarity protection).

PCB: EZB4:

one Schottky's diode (A7 T35) between the power in and the Vin. The 5 Amps must be diode max forward current.

Iotiny: one Schottky's diode (A7 T63). I'm guessing ... the diode reference is different the limit must be different too.

Once again thanks for pointing out!