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General Purpose Tri State Gate - Homemade Computer copy

3 months ago 16
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I realised that on my PCBs, I can't always fit a tri-state gate (take the shifters, for example), thus I need a way to control the output to the bus.

This tri-state gate contains a gate to the bus, but also a multiplexer to choose between two input sources.


GP Tri-State Gate copy

GP Tri-State Gate copy


ID Name Designator Footprint Quantity
1 SN74LS245N U5 DIP-20_300MIL 1
2 74LS157N U1,U2 DIP16 2
3 O7 O7_LED LED-3MM/2.54 1
4 220 R8,R2,R3,R4,R5,R6,R7,R1 0805 8
5 O1 O1_LED LED-3MM/2.54 1
6 O2 O2_LED LED-3MM/2.54 1
7 O3 O3_LED LED-3MM/2.54 1
8 O4 O4_LED LED-3MM/2.54 1
9 O5 O5_LED LED-3MM/2.54 1
10 O6 O6_LED LED-3MM/2.54 1
11 O0 O0_LED LED-3MM/2.54 1
12 Connections H1 DIP-1X4P-2.54MM-M 1
13 Inputs P1 HDR-8X2/2.54 1


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