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Onstep ramps shield

philipreinken·onstep-ramps-shield

Onstep ramps shield layout, top view — open source board by philipreinken

About the Onstep ramps shield

Onstep ramps shield is an open source PCB design by philipreinken, published on GitHub under the GPL-3.0 license. It is a board measuring 116.8 × 67.3 mm, with 31 components from 19 distinct parts.

By type, the board carries 5 resistors, 2 diodes and 1 buzzer.

It belongs with the dev boards & breakouts and sensors designs in this gallery.

From the project

An add-on board which allows placing additional hardware for OnStep on a RAMPS board

This is an add-on board for a RAMPSv1.4 (and some later versions) board, which carries a bit of additional hardware necessary for an OnStep telescope controller.

There are different ways to build an OnStep, including using a completely custom board, but I liked the modular approach and used an Arduino Mega in combination with a RAMPS shield. The custom boards of course offer places to fit connectors and such which the Arduino/RAMPS combination doesn't, so I'm trying to build this board to help with that.

Onstep ramps shield, from the project README
From the project README

Onstep ramps shield bill of materials (BOM)

31 components, 19 distinct parts.

QtyPartRefs
1
Buzzer
BZ1
4
RJ12
DEC1, FOC1, FOC2, RA1
1
RAMPS_AUX1
J_AUX1
1
RAMPS_AUX2
J_AUX2
1
RAMPS_AUX3
J_AUX3
1
RAMPS_AUX-4
J_AUX4
3
Conn_01x04_Female
J_BME280, J_DS3231, J_HC5
4
RAMPS_MOTOR
J_DEC1, J_FOC1, J_FOC2, J_RA1
1
RAMPS_I2C
J_I2C1
2
AudioJack3
J_PEC1, J_RET1
1
RAMPS_ENDSTOPS
J_SER1
1
RAMPS_SERVOS_SER1
J_SERV1
1
RAMPS_SERVOS_SER2
J_SERV2
1
RAMPS_SERVOS_SER3
J_SERV3
1
RAMPS_SERVOS_SER4
J_SERV4
2
LED
D1, D2
2
2k
R1, R5
2
350
R2, R3
1
1k
R4

Onstep ramps shield design files

The KiCad project lives in the philipreinken/onstep-ramps-shield repository on GitHub; these links point at the commit this page was built from.

Onstep ramps shield: common questions

How big is the Onstep ramps shield?

The Onstep ramps shield measures 116.8 × 67.3 mm and is 1.6002 mm thick.

How many components are on the Onstep ramps shield?

31 components, from 19 distinct parts. The full bill of materials is listed on this page.

Where can I download the Onstep ramps shield design files?

From the philipreinken/onstep-ramps-shield repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Onstep ramps shield design in my own project?

Yes, under the terms of its GPL-3.0 license, which philipreinken chose for the repository.

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