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STD Elk Modular Synth - Interface

License: Public Domain

Mode: Editors' pick

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Update time: 2020-09-09 08:34:16
Creation time: 2020-06-02 08:41:28
Description
Acorn Electron User Port Interface Board v1.1. Each User Port is buffered in two ways, Optically Isolated and Voltage Level shifted. LED indications included for each bit.
Design Drawing
schematic diagram
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PCB
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ID Name Designator Footprint Quantity
1 P7 P7 DSUB-TH_D-SUB-25P 1
2 WJ2EDGVC-5.08-3P T1 WJ2EDGVC-5.08-3P 1
3 10K RP1,RP2,RP3,RP4 SIL-9 4
4 SN74HC244N U5,U6 DIP-20_L26.8-W6.4-P2.54-LS7.6-BL 2
5 1u C7 CAP-D4.0XF1.5 1
6 10K R1,R2,R4 AXIAL-0.4 3
7 3K3 R3 AXIAL-0.4 1
8 Header-Male-2.54_2x5 H1,H2,H3,H4 HDR-5X2/2.54 4
9 Header-Male-2.54_1x1 P3,P4,P5,P6 HDR-1X1/2.54 4
10 CD40109B U2,U1,U3,U4 DIP-16 4
11 HDR-IDC-2.54-2X10P P1,P2 HDR-IDC-2.54-2X10P 2
12 BLUE LED2,LED1 LED-3MM/2.54 2
13 LED-3MM D8,D7,D6,D5,D4,D3,D2,D1,D9,D10,D11,D12,D13,D14,D15,D16 LED-3MM/2.54 16
14 100n C3,C2,C1,C4 CAP-3.5*7.5*7.2 4
15 10n C6,C5 CAP-3.5*7.5*7.2 2
16 ILQ1 U7,U8,U9,U10 DIL16 4

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