Onstep EQ5 GoTo - Building Instructions; OnStep Controller Overview; Bill of Materials; Software Setup and Configuration

Building instructions
OnStep Controller
Bill of materials
Item:
Qty.:
Price ($)
URL
WEMOS D1 R32 ESP32 WiFi BT Development Board
1
7.00
LINK
Arduino CNC V3 Shield
1
3.50
LINK
LV8729 Drivers
3
18.00
LINK
NEMA17 Stepper Motor 0.9deg 1.68A 40mm*
2
34.00
LINK
GT2 12t 6.35mm bore 6mm belt pulley (DEC shaft)
1
4.00
LINK
GT2 16t 6.35mm bore 6mm belt pulley (RA shaft)
1
3.00
LINK
GT2 48t 5mm bore 6mm belt pulley (Stepper shafts)
2
9.00
LINK
GT2 6mm 150 Closed Loop Timing Belt (RA Axis)
1
4.00
LINK
GT2 6mm 140 Closed Loop Timing Belt (DEC Axis)
1
3.00
LINK
RJ45 breakout boards (Pack of 6pcs, but only 5 needed)
6
6.00
LINK
RJ11 / RJ12 / 6P6C Breakout Board
1
12.00
LINK
NodeMCU ESP8266**
1
3.00
LINK
DS3231 Real Time Clock***
1
1.50
LINK
Set of Dupont 20cm Jumper Wire (FF/MM/FM)
1
8.00
LINK
Set of 5.5x2.1mm DC Power Plugs (F/M)
1
5.50
LINK
Total cost
121.50
* Cheap stepper motor, but not the most efficient one. Based on some forum posts there
seems to be versions of this motor rated for 0.9A only with similar performance. This should
probably be considered if you’re aiming for maximum energy efficiency (ie. maximum battery
life etc.)
** I used a NodeMCU ESP8266 DevBoard I already had from an earlier project (and it’s
been dead stable), but the Wiki recommends the Wemos D1 Mini version.
*** I’m not really sure if this RTC is adding any real benefit or improvements to this system,
but since these cost next to nothing I figured it was best to include it just to be on the safe
side.