Voltage Problem...Need Help

[Nigel Goodwin]

hehehhe... guys... i ask you for help and you ask about things that i dont know and don t care about
i have no idea why this motor is like that ....and i don t care.. this is the motor i m using... can t you just accept that a such motor exists ??

No, because that's probably why it doesn't work!.

Motors don't just take a specific current - it's HIGHLY dependent on the load, and there are three values you really need to know.

Off load current - the lowest it can possibly be, this may well be your 100mA? - it's unlikely a 12V motor would take less off load.

Average running current - probably 5 to 10 times off load current (500mA to 1A).

Starting/stall current - probably 10 - 20 times running current (10A - 20A).

You see the problem! - your H-bridge may well need to with stand 20A, at least for a short period of time.

 

[Blatman Bond]

Hi, guys.., don't make him in frustration.

 

[audioguru]

Gluing together small, weak little transistors for them to smoke and melt when the motor does some work??
It must be frustration using to use wrong parts.

 

[Inferno]

....i made the bridge with the transistors.. and it works perfectly ....
when i said 0.1 A it was the current that runs in the motor when it s running with full load...when it s not loaded .... the current is just 0.04 A ...
and an other thing... if you are electronics professionals and you like to share your knowledge in online forums you shouldn t act like this ... anyway thanks for your help ... i ll post later the full shematics with photoes... catch you later !

 

[Nigel Goodwin]

....i made the bridge with the transistors.. and it works perfectly ....
when i said 0.1 A it was the current that runs in the motor when it s running with full load...when it s not loaded .... the current is just 0.04 A ...
and an other thing... if you are electronics professionals and you like to share your knowledge in online forums you shouldn t act like this ... anyway thanks for your help ... i ll post later the full shematics with photoes... catch you later !

It's completely pointless giving you incorrect information - why is asking for more information from you "acting like this". You've now provided the information we asked for (but too late), why couldn't you do that before?.

 

[Inferno]

i just gave you the maximum current that the motor should handle..when i have .04 and .1 i should only worry about the .1 ......

 

[Blatman Bond]

It might be help, just an appnotes : "MOTOR CONTROL SOFTWARE EXAMPLES".
**broken link removed**