Custom ADS1256 board - revised version

TL;DR

This video discusses corrections and improvements to a 24-bit ADC board assembly.

Transcript

welcome everyone this is a follow-up video regarding my circuit which is a 24 bit eight channel ad converter and i already introduced you this circuit in a previous video not so long ago but i discovered that there are a few mistakes in the board as well as i ordered a bit too large stencil so i fixed those mistakes on the board i added the necessa... Read More

Key Insights

• ☠️ The creator emphasizes the importance of correct specifications in PCB design, as seen with the correction of a sample rate typo, highlighting potential issues in performance if overlooked.
• ✋ Sourcing high-quality PCB services like PCBWay is crucial for hobbyists and professionals alike to ensure reliable and precise board production.
• 🎨 Design modifications such as rounded traces can improve both functionality and aesthetics, showcasing the importance of detail in PCB design choices.
• 🛩️ Switching to a smaller stencil can significantly impact the assembly process, demonstrating the value of tailored tools for specific projects.
• 🌍 The video serves as a reminder that prototyping involves continuous learning, adaptation, and refinement of designs based on real-world testing and results.
• 👻 Offering assembly services and DIY options for the ADC board allows the creator to engage with a broader audience while addressing challenges in component availability during shortages.
• 👨‍💻 Developers should consider documenting their code and design processes thoroughly, as indicated by the creator's commitment to producing a detailed library for future users.

Questions & Answers

Q: What were the main mistakes found on the previous ADC board?

The creator identified several mistakes in the previous design, including a typo in the sample rate specification and an incorrect ground connection, which affected circuit operation. These issues were addressed in the updated revision of the board.

Q: How does the new stencil improve the assembly process?

The smaller stencil allows for easier application of solder paste, improving the precision of placing components. This modification is expected to enhance the overall soldering quality and assembly efficiency compared to the previous, larger stencil design.

Q: What aesthetic changes were made to the updated board?

The updated board features a black silk screen instead of the previous white, making component identification less conspicuous, thereby drawing more attention to the components themselves. Rounding the traces was another aesthetic change that helps improve the visual appeal and potentially the electromagnetic characteristics.

Q: What issues arose during the soldering process and how were they addressed?

The soldering process revealed that uneven heating from the new reflow hot plate caused one corner of the board to not solder properly. The creator plans to fix this by using a heat gun to ensure all components are properly attached.

Summary & Key Takeaways

• The creator revisits the assembly of a 24-bit ADC board after fixing errors and updating the stencil size to enhance assembly efficiency.

• Modifications include changing the silk screen color, correcting design flaws, and implementing rounded traces for better aesthetics and functionality.

• After assembling the board, the creator tests the circuit's functionality, shares advice on sourcing components, and teases upcoming library documentation for Arduino compatibility.