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Design rules » Historie » Version 21

Maximilian Seesslen, 14.05.2023 12:01

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h1. Design rules
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h2. Traces
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min. drill diameter: >=0,3mm
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min. trace width:    0,150mm
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pad diameter DuKo:   0,6mm (spec. 0,7mm?) !!
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hole to hole:        0,35mm (not specificated. Via was missing. Wert empirisch. Does not happen when following other design rules)
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Distance to cuts     0,35mm (cut-through to easily by grinding)
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* Power: 0,2 distance; 0,2 width
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* Powerline (240V): 1,5 distance; 2,5 width (CANSwitch)
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2,5mm: ca. 1.5A bei 10°C rise
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!design_rules.png!
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h2. Text varnish
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Lack:
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Gut, fuer längeren Text:
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0,7x0,7; Staerke 0,1mm (NUC64Debug V0.2.x)
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(zu klein fuer Schrift in Copper)
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Zu klein:
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0,4x0,4; Staerke: 0,05 (CAN/IO)
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Geht noch, nicht kleiner:
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*0,6x0,6; Staerke: 0,05* (CANDisplay::Eval; Miniminutnik)
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Geht noch, eher nicht kleiner, manche Labels nicht mehr eindeutig:
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0,55x0,55; Staerke: 0,15 (CAN/IO v0.6.x, einzelne Referenzen nur erratbar)
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h2. Text copper
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Copper:
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Gut unverzinnt:
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0,6x0,6; Starke 0,08mm
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schlecht verzinnt:
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0,7x0,7; Staerke 0,1mm (NUC64Debug)
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nearly ok:
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0,75x0,75; Staerke 0,15mm (Candisplay Eval)
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Still dots not ok:
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0,8x0,8; Staerke 0,2mm (CANIO 0.6.x)
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next test:
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0,85x0,85; Staerke 0,25mm (EEPROM)
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h2. Standard LEDs; 2V @ 3V
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120 Ohm: very bright
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240: bright, ok for blinking, still to bright for permanent on
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480: should be the usual case
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1k Ohm: very dark. eg. ok for power LED