Hitec HSR-5990 - which Controller and Motordriver

Help & Support Robot Parts
1

Hello,

first sorry for my bad english, I’m a german. I have tested the Hitec HSR-5990. And I have found some voltage drop, when I ask the current (the parameter of the H-Bridge). So I want to write my own firmware. Has anybody some Infos of the HSR-5990. Which Controller and Motordriver are built in? Has someone a photo from both sides of the Controllerboard?

Greetings

Snowyrain

EDIT: I have seen, that the motordriver is a IRF7389 (LINK1)
The HSR8498HB use also the IRF7389 as motordriver.
Here LINK2(Page 1-2) are some Infos of the HSR8498HB. Is the same controller in the HSR-5990?

LINK1:
robosavvy DOT com/Builders/i-Bot/HSR8498HB%20Servo.pdf
LINK2:
lynxmotion DOT net/viewtopic.php?t=2152&postdays=0&postorder=asc&start=15

2

I put some pictures here:

robosavvy.com/Builders/i-Bot/hsr5990.zip

The processor and H bridges(IRF7389) are the same.

Note the programming pins are now brought to gold pads. There is a bootloader in the ATMega8, but it is not documented anywhere