dc42:
The resistors go the other way round (470 ohm to the lower transistor, 100 ohm to the upper transistor), and both the 1.5V and the 3.5V need to be increased to 5V if you want to feed about 3.5V to the motor.
thanks for the help, but my problem is in the robots motor. it only has lower than 4v i think for its dc motor, and i want to amplify it to a bigger volts. and replacing its motor to a bigger motor,. 6v motor.
pls help me. read my past post for more info. thanks.
HazardsMind:
Can you show us a picture? What is this motor in, does it have its own housing, holding it in place. You might not be able to change it.
Post a picture, that way we will have a better understanding of what your trying to do.
i want to amplify the volts produced by the line follower to power its dc motor, since its to weak to carry my sla 7v battery so i will modify my dc motor to a bigger and stronger one,. the logic of hbridge is correct but the hbridge wont work at all.
AWOL:
Can you get hold of DPDT relays (or SPDT relays)?
Use those instead of the H-bridge.
I think I've already suggested this.
i searched it in google, the dpdt relay.
i think that is not possible. the dc motor continues to turn in a direction if there is no voltage in the relay...
AWOL:
Can you get hold of DPDT relays (or SPDT relays)?
Use those instead of the H-bridge.
I think I've already suggested this.
i searched it in google, the dpdt relay.
i think that is not possible. the dc motor continues to turn in a direction if there is no voltage in the relay...
You need to use two relays, one DPDT to determine forward/reverse and a one SPST to to perform the stop/go command, this second relay's contacts is simply wired in series with the positive voltage coming from the motor battery.
You need to use two relays, one DPDT to determine forward/reverse and a one SPST to to perform the stop/go command, this second relay's contacts is simply wired in series with the positive voltage coming from the motor battery.
Or, if you want speed control and have an appropriate transistor, you use that in place of the single-pole relay, and just use the DPDT for reverse.
You need to use two relays, one DPDT to determine forward/reverse and a one SPST to to perform the stop/go command, this second relay's contacts is simply wired in series with the positive voltage coming from the motor battery.
Or, if you want speed control and have an appropriate transistor, you use that in place of the single-pole relay, and just use the DPDT for reverse.
o! my friend will travel to manila, i will give her a favor to buy what i need.
some one say here that their is an hbrige built in an i.c? what exactly the name of the ic?
that has the capability of giving what i want. pls suggest what is that hbridge ic. to be sure do not suggest rare ones. thank you so much. im looking forward for your reply.