- Mon Sep 18, 2017 3:55 am
#21251
Due to requests for stepper idle-air valve (IAC) control and/or extra outputs on various Speeduino (and other EFI system) boards such as the Speeduino v0.3 series, this bare DIY expansion board was designed to fill some of those needs. It includes a DRV8825 stepper module position, and a ULN2803A position with paired channels for 4 additional 1A grounding outputs, with diagnostic LEDs and outputs on 3.5mm screw terminals. The stepper driver and outputs are separate, and do not require populating with parts if not needed. It will sit or stick wherever you can find space, but envisioned over a proto area or clear space for easy wiring.
In order to use this expansion board on v0.3 series Speeduinos, noisymime will need to add a board description to TunerStudio, including new control pin designations, so the options and features are selectable. This PSB is offered here as an open-source design, and is generic in nature, with no claims to suitability for any particular application. The PCB is 27.3 x 47.5mm (about 1 x 1.9"). The PCB design has been uploaded to PCBs.io as project 8g30x for those wishing to simply click a purchase of four PCBs at their current price of $8.11, including worldwide free shipping. Just to be clear — that is 4 boards and free shipping at that price, using the link above. I have no business connection with PCBs.io, except as a customer, and this is only to make access for a few bare PCBs easier for members wanting them.
For those wishing to make their own, or have them made elsewhere, the zipped Gerber files are here:
And the Bill Of Materials (generic BOM assembly parts list without specific part numbers) is here: As always, comments, suggestions, and posts of how you use it are always welcome! I will post some photos of completed modules when the first batch of boards arrives.
David
In order to use this expansion board on v0.3 series Speeduinos, noisymime will need to add a board description to TunerStudio, including new control pin designations, so the options and features are selectable. This PSB is offered here as an open-source design, and is generic in nature, with no claims to suitability for any particular application. The PCB is 27.3 x 47.5mm (about 1 x 1.9"). The PCB design has been uploaded to PCBs.io as project 8g30x for those wishing to simply click a purchase of four PCBs at their current price of $8.11, including worldwide free shipping. Just to be clear — that is 4 boards and free shipping at that price, using the link above. I have no business connection with PCBs.io, except as a customer, and this is only to make access for a few bare PCBs easier for members wanting them.
For those wishing to make their own, or have them made elsewhere, the zipped Gerber files are here:
And the Bill Of Materials (generic BOM assembly parts list without specific part numbers) is here: As always, comments, suggestions, and posts of how you use it are always welcome! I will post some photos of completed modules when the first batch of boards arrives.
David
Last edited by PSIG on Wed May 23, 2018 8:47 am, edited 1 time in total.
-= If it was easy, everyone would do it =-