Recommendations for ACES Learning EAGLE
- For all but the simplest breakout boards, invest the time to assemble a working prototype first (don't guess, no matter how confident you might be)
- All complex software applications are quirky, EAGLE is no exception. Accept it.
- Finding the EXACT part you require can be a real challenge. To this end I actively maintain two EAGLE Parts libraries (Through Hole and Surface Mount) containing the parts most often used by ACES (ACES_THT.lbr, ACES_SMT.lbr). You'll also find these links at the top of your respective course pages.
- Always design for 3mm mounting holes (3.2mm). You never know when you might need the PCB to fit inside a case that includes heat set inserts.
- Include your name in the top silk screening (and the ACES logo if our budget is participating :)\
- When selecting a font (vector, proportional, or fixed) vector is the preferred choice as it remains size-stable.
- The ACESTHTLegacy.cam file has been designed to fit well with the components found in the ACES_THT.lbr and ACES_SMT.lbr libraries. Please use this one to created the Gerber files from your
- The term 'appliance', as it relates to a PCB that inserts directly into the female headers of a UNO, is a term I simply made up.
- The male headers of an appliance can by straight (the appliance would lay flat) or right-angled (the appliance would stand vertically)
- The issue of the facing direction for me comes down to balance. A tall design, with THT components that are relatively large compared to their SMT counterparts, can lead to stability issues. An inward-facing orientation is less 'tippy'.
- Access to additional supply and/or analog input pins is enhanced with an inward-facing design.
- You have to consider the total power draw of your appliance in your design. Digital pins can only source a maximum of 40 mA. For more than that, your appliance must access a 5V pin. From what I can tell, there are three accessible 5V pins on the UNO: one female 5V pin on the Analog side, and two male 5V pins on each of the two ISP headers.
- If you feel the need for your PCB to span both sides of the UNO, you may consider using the open-source UNO Rev3 Shiled as a starting point. EAGLE files for a varitey of designs canbe found. Here's one offering from Adafruit: https://github.com/adafruit/Adafruit-Proto-Shield-PCB
- Know the dimensions of the breadboard perfectly before you begin to lay out your board.
- For breakout boards, especially for the 8-pin DIPs, try to restrict beaking out the pins on ONE side, if possible.
- If you have to break out on two sides, make sure the header spacing is a multiple of 0.1"
- Two-sided breakout are tricky and can make it difficult to wire.