Hello im looking for a little help with a project im about to start on
Im looking to power 2x Peristaltic pumps for approx 1 min every hour but both must be individually controlled
They are 12v 80ma draws so using the pins is way out
So im thinking either external source and using transistors and resistors back to pwm to control it in one direction only, or using a motor shield which would give me use of both directions and an ability to reverse pumps to flush the lines out daily.
Any thoughts on the above about which is the better way to be doing this. Is there any risk to using the transistor way other than its one direction only and is there any downsides to the motor shields? iv never used them before is
That size of motor will probably have a stall current within the capabilities of most H-bridges, especially
at 12V. I'd assume 0.5A is a reasonable peak current rating to play with. The data only gave the
normal load current, whereas the stall current is always what matters for a motor driver.
MarkT:
That size of motor will probably have a stall current within the capabilities of most H-bridges, especially
at 12V. I'd assume 0.5A is a reasonable peak current rating to play with. The data only gave the
normal load current, whereas the stall current is always what matters for a motor driver.
Sounds positive then, I was hoping with it only being a small motor which pushes a very simple pump head the current shouldn't be stupid and certainly shouldn't be drawing maximum current and stall due to having no more reserves to draw upon.
That being said though it's if a motor driver is nessesary too and if much benefit is even there
whell i don't know why you need to flush as these pumps are used to pump fluids like acid,chlorine etc at any rate assuming you have the 12v to power the project you could use a 555 timer i.c. and relay with a time cycle 1 min off 59 off or an arduino uno and relay shield or get a 120v version of the pump with adjustable feed rate that would do the same