ELECTRONICS

The electrical part may be result not so easy for everyone.

Since I hate wires I designed a specific DIY shield that fits on the Arduino due.

I have used Arduino due because I need very high accuracy with floating point calculus and it is more simple to use an ESP module due to the same operative voltage (3.3V).

So the components are:

 

-CAPACITOR – 2x100uF, 1x47uF, 5x 0.1uF

 

-Resistors(if you want leds) – 68 oHm  for the red, 82 oHm for the green

 

-Diode for the in polarity protection:  at least more than 12v (I used a 47V one)

 

- esp8266 (It is perfect because of it's working voltage)

 

-lcd1306 oled I use it for debugm and display current status of the Tracker

 

-2 x  driver A4998 or dvr8825.

-

Endstop

 

-potentiometer (I used a potentiometer instead of a second Endstop, because I can have a second Angle control and not only from the Stepper motor.

 

-female and male pin

I used a double layer pcb because it is just impossible to fit everithing in one layer.

I used the toner Transfer way without heat, you can find a lot of videos on you tube.

Just print the two circuits(top.pdf and bot.pdf ) e using ( acethone and alcohol solution 1:3) transfer of the cupper piece.

Print them with maximum toner density possible.

-Fix errors with a felt tip pen and dip in FeCl3 salt  (at least at 50 degrees to speed up the reaction ). You can use a solution with HCl too but I don't advice  because it's too dangerous.

After few minutes(4-5) take out the circuit

 

-Drill where it needs with a 0.7mm tape

My PCB as you can see in the photos it's not perfect but enough to work.

Clean everithing with acethone and control with a multimeter if the lines are discontinued.

Just solder all the components and vias.

(DANGER, wear protection glasses and mask. Do it outside !!!!!!)

If you want to be uploaded some of your projects ...just email me. 

My email is written at the bottom of the page

for information, advice, questions

write to my email or just write in the chat box

not1996@hotmail.it

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If you want to be uploaded some of your projects ...just email me 

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