First, let's talk about the current progress. The hardware solution is basically finalized, and we are now preparing to create prototype machines. If everything goes well, we will then start writing software. If that also goes well, we will proceed with product testing. And if all continues to go smoothly, we can announce it.😅The cycle is quite long, and it's difficult to do well.
Returning to the main point, a key factor is cost. I have tried to minimize component costs while still ensuring functionality. The PCB fabrication costs are within an acceptable range.>JLC Haha. The plan for the final product is to use both CNC-machined heat sinks and 3D-printed enclosures. As for soldering, considering that most people probably won't be able to solder surface mount components, I plan to use a large quantity of 0402 SMD resistors and capacitors. I also plan to find an SMT processing factory to handle the assembly.>JLC is also an option. He has a pricing page that calculates the price, estimating dozens of components, 400 solder points, and the largest cost is likely the replacement parts (the more types, the higher the price). The small resistors and capacitors are incredibly cheap, but when it comes to soldering, they become a nightmare; hand-soldering will exhaust you, while factory-soldered boards are very expensive. I don't know the pricing from Taobao, but I heard that if you order in small quantities, they may even have employees manually solder them (this is more cost-effective for small orders). Single-sided PCBs are also cheaper than double-sided ones; I will choose single-sided, and I want to place most of the components on the front side, except for the amplifier that requires heat dissipation. The amplifier chip on the back can be manually soldered onto the board using a hot air gun (the amplifier is on the back because it needs heat dissipation) (all connectors are hand-soldered; you just need a soldering iron at home). If this is the case, I need to modify the layout of the PCB now. For example, the components will be on both sides (a rough component layout) (not single-sided). If I choose single-sided, then the front side should be able to accommodate them. The current board size: 53x83mm (can be modified).
Actually, double-sided adhesive is about 200 yuan more per set than single-sided adhesive. The total cost of JLC varies from a few hundred to over 1,000 yuan (depending on the number of "看板子" you need), and I plan to buy most of the components on Taobao because they are cheaper and readily available, although I can't guarantee 100% quality.
I asked this early on because the decision would later affect my current hardware design.
Ultimately, it all comes down to cost.😂Or are there other good channels or methods?
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