PDP-8 Front Panel Assembly Sheet
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|19||LED, 5mm, Orange
|D1-D19||1||Header, Rt Angle, 0.1", 2x25||J1|
|19||Res, 1K, 1/4W
|R1-R19||7||Switch, Pushbutton, 6mm
|21||Res, 10K, 1/4W||R20-R41||14||SW_SPDT, 3 pin, 0.1" (NOTE 4)||SW1-SW9,SW17-SW21|
- Select LED color. I used orange clear LEDS but orange diffused body LEDs might be better since clear LEDs reflect background light.
- LED ballast resistor. I used 1K because modern LEDs are really efficient and can get uncomfortably bright with higher current. Vcc is 3.3V, Orange LED drops ~1.8V. Leaves 1.4V across resistor. Equals 1.4 mA with 1K resistor.
- Pick whatever height button you like. I used 9mm tall which is pretty tall but it's what I had sitting around.
- 0.1" pins. Select either SS12D00G3 3 pin slide switch or 3 pin headers.