3 ms·
I haven't compiled the full BOM yet (since I gathered the parts for this gradually over an extended time), but I'm 99% certain BOM cost for a single unit is und
by scottbez1 5y ago
I haven't compiled the full BOM yet (since I gathered the parts for this gradually over an extended time), but I'm 99% certain BOM cost for a single unit is under $200. Probably closer to $100 or $150.
And I think the single most expensive item was ordering the 3D printed parts as MJF nylon for better tolerances and surface finish, at ~$35 (I FDM printed some functional prototypes, so that's a cheaper option too, they were just ugly). PCBs and stencil were $24 (enough to build 5x, so more like $5 each if you build more than one or split it with a friend). LCD was ~$6, ESP32 module ~$7. Motor $4. Strain gauges $5 (enough for 2x). Misc electronics (CH340, HX711, VEML7700, MT6701, resistors, caps, LEDs) were probably $20-50 in total from a few different suppliers). All of those numbers are with shipping included.