Pulse motor build off time.

[TommeyLeeReed]

HI TInsel,

My cost was about $50.00 out of pocket, yet I have tons of parts and 20+ microcontroller   chips at a cost of $2each.

Arduino boards cost much more, but it's a good start also.

I just may have to add another controller, due to not having enough input/output ports per chip...

One chip takes up most of the ports due to the LCD screen. The other needs to run the motor timing and so on...

Tom...

[TinselKoala]

HI TInsel,

My cost was about $50.00 out of pocket, yet I have tons of parts and 20+ microcontroller   chips at a cost of $2each.

Arduino boards cost much more, but it's a good start also.

I just may have to add another controller, due to not having enough input/output ports per chip...

One chip takes up most of the ports due to the LCD screen. The other needs to run the motor timing and so on...

Tom...

Yep, I know what you mean, with a standard LCD you need a lot of wires. You might check out the "Parallax" brand LCD screens, they use a single data line and the two power wires, so you get full control of the LCD with only one data output port from your MCU. And you can get, for example, an Arduino "pro mini" for about 4 dollars each from China, or around 10 dollars from the genuine Arduino folks or SparkFun, etc. It uses the same Atmel chip, or rather a smd version of it. For that one you need an "ftdi" usb interface for programming though, another few dollars, but you only need one, can use it for all the pro minis you need.

[MarkE]

Hi All,

This is my update on the 2014 pulse motor build off.

https://www.youtube.com/watch?v=6h86yZ1g4qU

Tom

So just a little note here:  In order to protect the switching MOSFETs you want the inductance loop from the MOSFET drain through the catch diode back to where the + side of the coil connects to the power supply as possible.  See the drawing below:

[MarkE]

HI TInsel,

My cost was about $50.00 out of pocket, yet I have tons of parts and 20+ microcontroller   chips at a cost of $2each.

Arduino boards cost much more, but it's a good start also.

I just may have to add another controller, due to not having enough input/output ports per chip...

One chip takes up most of the ports due to the LCD screen. The other needs to run the motor timing and so on...

Tom...

Most parallel interface LCDs can operate in a nybble wide mode that cuts the number of data lines down from 8 to 4.

[TommeyLeeReed]

HI Mark E,

Not what I'm doing, it's more like a pump circuit design with extra diode that protects mosfets.


Tom...