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.
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.
Those motors are going to require a lot of current, your best bet now would be to get a actually Hbridge board. http://item.mobileweb.ebay.com/viewitem?itemId=251080674810&index=1&nav=SEARCH&nid=83702557639
its to weak to carry my sla 7v battery
How many transistors did you get, maybe you can double them up and make them into darlington pairs.http://www.google.com/imgres?hl=en&safe=off&sa=X&tbo=d&biw=1440&bih=754&tbm=isch&tbnid=JwhGtXRza51_UM:&imgrefurl=http://www.opencircuits.com/Basic_Circuits_and_Circuit_Building_Blocks&docid=ByS_Bn7_5pUhSM&imgurl=http://www.opencircuits.com/images/3/30/Dtrans.png&w=500&h=356&ei=SR0JUc7iLua20AGKy4CwBw&zoom=1&iact=rc&dur=4665&sig=106574055291386674452&page=1&tbnh=178&tbnw=266&start=0&ndsp=19&ved=1t:429,r:2,s:0&tx=121&ty=88
what is the difference between the normal transisotr switch and a darlington connection?
Can you get hold of DPDT relays (or SPDT relays)?Use those instead of the H-bridge.I think I've already suggested this.
Quotewhat is the difference between the normal transisotr switch and a darlington connection? Much higher gain
Quote from: AWOL on Jan 30, 2013, 09:00 amCan 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...