How to order the
v4.1 PCB.

Chapters

The walkthrough runs 4 minutes 33 seconds. Jump to a section of the transcript below, or use the matching chapter markers in the player.

1. 0:00 Introduction and AI ordering assistant
2. 0:19 Open Hardware page and production-package download
3. 0:58 Uploading Gerbers to JLCPCB
4. 1:20 PCB assembly settings
5. 1:34 Checking settings with the Sankhya Farms assistant
6. 2:08 Reviewing the generated PCB
7. 2:39 Uploading BOM and Pick and Place files
8. 2:51 Component selection and DNP component
9. 3:12 Checking parts and substitutions
10. 3:38 DNP warning and placement review
11. 4:02 Downloading the placement image and final AI verification
12. 4:19 90%+ confidence check and payment

Full transcript

A cleaned text transcript of the walkthrough, in the order it is spoken. Timestamps link into the video at that point.

0:00 Introduction and AI ordering assistant

In this video, I'll show you how to order the Sankhya Farms control board from JLCPCB. We'll use the free AI ordering assistant on sankhyafarms.com to check each screen, verify your settings, and catch mistakes before you place the order.

0:19 Open Hardware page and production-package download

Now, open sankhyafarms.com and select Open Hardware from the top right menu. On the Open Hardware page, click Order with the Assistant. Scroll down through the panel on the left until you see the download button, then download the board production package. Once the zip file has finished downloading, extract it into a new folder. Inside you should see the three files needed for ordering: the BOM file, the Gerber files, and the Pick and Place file.

0:58 Uploading Gerbers to JLCPCB

Next, open jlcpcb.com in a new tab and click Order Now. Under Add Gerber File, upload the Gerber zip you just extracted.

1:20 PCB assembly settings

Scroll down and enable PCB Assembly. Choose Standard Assembly, and under Assembly Side, select Both Sides. We also recommend setting Confirm Parts Placement to Yes.

1:34 Checking settings with the Sankhya Farms assistant

Before continuing, take screenshots of your selections and paste them into the Sankhya Farms assistant's prompt box. You can also ask the assistant about any setting you are unsure of.

2:08 Reviewing the generated PCB

Once the assistant confirms that everything is correct, return to JLCPCB and click Next. You'll now see the PCB populated from the Gerber files. From this point onward, we recommend taking screenshots of every screen and confirming each step with the assistant before proceeding. The assistant is designed to verify all important settings and will ask you to provide screenshots or PDF uploads where needed.

2:39 Uploading BOM and Pick and Place files

Next, open the Bill of Materials tab and upload the remaining two files from the extracted folder: the BOM file and the Pick and Place file.

2:51 Component selection and DNP component

On the next screen, you'll see all the components populated. Visually check that every part is selected. If any component is not selected, select it manually. There should be only one exception. Look for the part marked DNP in the second column. DNP means Do Not Place, so that part should remain unselected.

3:12 Checking parts and substitutions

At this stage, we strongly recommend confirming all component placements with the assistant before proceeding. Some parts may be out of stock, and JLCPCB may automatically substitute alternatives. Upload screenshots of the parts list and placement screen so the assistant can verify that every component and substitution is suitable for the board.

3:38 DNP warning and placement review

Once all the parts have been confirmed, click Next. You may see a warning because one component is intentionally marked DNP, or Do Not Place. This is expected, so select Do Not Place to continue. On the next screen, you'll see the components placed according to the uploaded BOM and Pick and Place files.

4:02 Downloading the placement image and final AI verification

Click Download Image, then upload that image to the assistant so it can visually verify every component placement. Follow the assistant's instructions carefully, as it will guide you through each board specification that should be checked before you proceed.

4:19 90%+ confidence check and payment

If everything has been completed correctly, the assistant will show a green confidence score above 90 and confirm that your order is ready for payment. If you have any questions, feel free to reach out on [email protected].

Files referenced in the video

• Gerber zip — manufacturing files for the bare board (upload the inner zip).
• BOM CSV — every component with quantity, reference designators and LCSC part number.
• Pick and Place / CPL CSV — X/Y position, rotation and layer for each part.

All three ship inside Sankhya-v4-1.zip, published under CERN-OHL-P v2 on the open-hardware page and mirrored in the hardware repository.

Prefer to read it?

The written JLCPCB assembly walkthrough covers the same ground with a realistic delivered-cost breakdown for 10 boards. The interactive ordering assistant checks your actual order screens against the v4.1 specification as you go — free, no sign-in.