OnStep controller V 1.4

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STD OnStep controller V 1.4

License: GPL 3.0

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Update time： 2021-11-29 00:18:38

Creation time： 2018-01-15 09:11:16

Description

Telescope OnStep goto controller - Arduino MEGA 2560 board More info about OnStep goto controller on [Howard Dutton project](http://www.stellarjourney.com/index.php?r=site/equipment_onstep) or [OnStep News](https://groups.io/g/onstep) For box see https://www.thingiverse.com/thing:2748375 #####Another recommended link: * [My OnStep ST4 Handheld controller](https://www.thingiverse.com/thing:2626117) * [My OnStep for Seben EQ3 mount](https://www.thingiverse.com/thing:2670699) * [My EQ telescope mount II. for OnStep goto controller](https://www.thingiverse.com/thing:2748281)

Design Drawing

schematic diagram

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OnStep controller for Arduino Mega 2560 (Alternate pin-map) V1.0
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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	100nF	C1,C4,C9	RAD-0.1	3
2	47uF	C2,C3,C5,C8	CAP-D3.0XF1.5	4
3	BYW29-200	D1	TO-220-2	1
4	A4988 Stepper Motor Driver Carrier	DEC,RA	A4988 STEPPER MOTOR DRIVER CARRIER	2
5	TS-1109	DEC+,DEC-,RA+,RA-,STOP	SW4-6.0X6.0X5.0MM	5
6	LM7809EE	IC1	TO220	1
7	LM7805EE	IC2	TO220	1
8	CON_HEADER_1X03	J1,J15	M1X3_MALE_RIGHT_ANGLED	2
9	CON_HEADER_1X02	J2	M1X2_MALE_RIGHT_ANGLED	1
10	CON_HEADER_1X02-PTH_RIGHT_ANGLED	J3,J4,J5,J6,J7,J8,J9,J10,J11,J12,J13,J16,J17	M1X2_MALE_RIGHT_ANGLED	13
11	CON_HEADER_1X03-PTH_RIGHT_ANGLED	J14	M1X3_MALE_RIGHT_ANGLED	1
12	POWER 12 - 24V	JP1	POWER_JACK_PTH	1
13	204-10UYC/S530-A3	LED1,LED4,LED5	LED-3MM/2.54	3
14	ARDUINO-MEGA2560_ARDUINO_MEGA2560	PCB1	ARDUINO_MEGA2560	1
15	4k7	R1,R4,R5,R8	0805	4
16	2k2	R9	0805	1
17	RJ45	RJ1,RJ2,RJ3	RJ45-3.68	3
18	2P2T	S1	2P2T	1
19	BUZZER	SG1	BUZZER-12MM	1
20	POWER SWITCH	SW1	SLIDE SWITCH 1P2T MODEL SK-12F14-G 2_54MM PIN SPACING NOT 3MM	1
21	DS3234SN	U1	RTC DS3234	1
22	ESP Adapter	U2	ESP8266_MODULE	1