Reddit reviews ZJchao Peristaltic Liquid Pump [Electronics]
We found 3 Reddit comments about ZJchao Peristaltic Liquid Pump [Electronics]. Here are the top ones, ranked by their Reddit score.
![ZJchao Peristaltic Liquid Pump [Electronics]](https://m.media-amazon.com/images/I/41--6gclAtL.jpg)
The pump is basically a geared down DC motor, so it has a lot of torque. Inside the pump is a 'clover' pattern of rollers. As the motor turns, the clover presses on the tube to press the fluid though. The pump does not need to be primed and in fact can self-prime itself with water a half meter with ease.You can PWM the motor to speed up or slow down the flow rate and if you connect the motor the other way it will move fluid the other direction. Works great with either a power transistor (basic on/off) or a motor driver chip such as the L293D. Features. Uses 3/16"" (4.7mm) outer diameter silicone tubing. Working Temperature: 0 ℃ - 40 ℃.Motor voltage: 12VDC. Motor current: 300mA. Flow rate: up to 100 mL/min. Weight: 200 grams. Dimensions: 27mm diameter motor, 62mm total length. Mounting holes: 3mm diameter, 5mm center-to-center distance.Dia.27.6 x Height 37.9 (mm) Pump head size(Φx H):Dia. 31.7 x Height 20.1(mm) pump tube size(IDxOD) :2.5*4.7mm weight: 200gpump tube (ID x OD) : 2.5mm inner diameter x 4.7mm
Like the adafruit ones? Or like these? http://www.amazon.com/Adafruit-Industries-1150-Peristaltic-Liquid/dp/B00HIX2PEG/ref=sr_1_1?ie=UTF8&qid=1419123489&sr=8-1&keywords=peristaltic+prime
Sound cool.
A few observations, if you don't mind me butting in.... Sounds like a really good application for a small peristaltic pump. If you are using some other type of pump, like an impeller pump, it might be higher flow than you need. A peristaltic pump and a relay would probably work.
here's one for low flow apps that is $23. There are tons on amazon and ebay:
http://www.amazon.com/ZJchao-Peristaltic-Liquid-Pump-Electronics/dp/B00HIX2PEG/ref=sr_1_1?ie=UTF8&qid=1452885463&sr=8-1&keywords=Peristaltic+Pump
I can appreciate your reluctance to use discrete semiconductors. (You are already using integrated semiconductors, of course.) It's a little trickier to make your own DC drivers out of discrete parts, but fortunately, there are many alternatives to that.
For one, you can use what's called an "H-bridge", which does both the direction changing and the driving of a DC load, and it's probably as easy to use as an SSR. You need one lead to "steer" and one lead to "drive". Another advantage of this is that you can use pulse width modulation, which preserves torque at low speeds and allows control over the speed of the pump. It also allows almost instant braking of the motor. When you turn that sucker off, it stops.
https://en.wikipedia.org/wiki/H_bridge
here is a data sheet for one from Mouser Electronics:
http://www.mouser.com/ds/2/405/lmd18200-440916.pdf
They are $15 in quantity 1.
http://www.mouser.com/ProductDetail/Texas-Instruments/LMD18200T-NOPB/?qs=sGAEpiMZZMvu8NZDyZ4K0cK2%252bZITVZKj
No harder to use than an SSR, I think. (I chose this one instead of 100 other because of its packaging. It's a TO-220 package and you can cram it into a PCB board without having to deal with surface mounting. (Heat sink it, though.)
For what you want to do using relays and slower pumps is the simplest, and using h-bridge and any pump is the most flexible.
If you want to do other things downstream of this, getting familiar with H-bridges is a good learning experience and will pay off more.
[edit: package]
this will probably prove helpful, it's a paristaltic pump so the fluidic path never directly contacts the mechanical elements (as opposed to a syringe pump). PWM-able for timing control, and you can likely control the flow rate further by using varying inner and outer diameters of tubing.