my particular problem
I have some mini dc motor & gearbox units. the specifications are 1 to 2 volts.
the H bridge chip I would like to use is a BA6218 as I have a lot of them.
but the BA6218 H bridge is 5 volts.
BA6218 datasheet
https://4donline.ihs.com/images/VipMasterIC/IC/ROHM/ROHMS04491/ROHMS04491-1.pdf?hkey=EF798316E3902B6ED9A73243A3159BB0one gearbox unit I would like to use, but it only uses 1.5 volts.
if i just add resistance in series with the dc motor and the BA6218 H bridge.
so the BA6218 runs at 5 volts. but the dc motor only gets 1.5 volts.
currents are less then 100Mma. efficiency will be low ,
so will this work? have not seen this particular problem in any H bridge circuit for dc motor control.
dc motors are to control mini jack screws in a DIY lens focus assembly.
BA6218 H bridge is to be used with TTL 5 volts logic & limit switches - Arduino control.
mechanically controlling zoom and a DIY lens focus assembly. is by rotary encoders
here is one I have one particular 1990s video-cam lens assembly I would like to use, as all the gears are already in a working assembly. in one unit , just add a new video image sensor to the back. as the bolt hole sizes are standard image sensor pcb mount. see image \/ , this unit came from a 3 volt dc video-cam assembly.