Shared Projects by Shaos

Breadboard ready four NAND gates

9th board for NEDONAND project

Pins: GND,A,B,C,D,E,F,G,H,I,AND,VCC (from right to left, AND is output of 9-input AND gate)

3rd board for NEDONAND project

It’s stackable 4-bit part of NEDONAND program counter with parallel load that uses 2 board NEDONAND-2 to count from 0000 to 1111 binary. Pins description (2 rows - male for inputs and female for outputs):

1.1) IN (OUT) - count enable
1.2) ACT0 - external writing signal "0"
1.3) ACT1 - external writing signal "1"
1.4) /RESET - master reset
1.5) CLK - clock signal
1.6) NC - not connected
1.7) VCC - power +5V
1.8) GND - ground

2.1) D0 - bit 0 for writing
2.2) D1 - bit 1 for writing
2.3) D2 - bit 2 for writing
2.4) D3 - bit 3 for writing
2.5) D4 - used in next stacked boards
2.6) D5 - used in next stacked boards
2.7) D6 - used in next stacked boards
2.8) D7 - used in next stacked boards
2.9) D8 - used in next stacked boards
2.10) D9 - used in next stacked boards
2.11) D10 - used in next stacked boards
2.12) D11 - used in next stacked boards (in case of 2K memory it's "0")

4-bit address output header on the right:

3.1) A0
3.2) A1
3.3) A2
3.4) A3

2nd board for NEDONAND project

It’s dual edge triggered D-flipflop with separate reset inputs. Pins description (from right to left):

1) GND - ground;
2) D1 - first data input;
3) ^C1 - first clock input (front active);
4) /R1 - first reset input;
5) Q1 - first straight output;
6) /Q1 - first inverted output;
7) D2 - second data input;
8) ^C2 - second clock input (front active);
9) /R2 - second reset input;
10) Q2 - second straight output;
11) /Q2 - second inverted output;
12) VCC - power +5V.

1st board for NEDONAND project

This is a 1-bit slice of NEDONAND ALU supporting shift right RRC (000), shift left RLC (001), NAND (010), XOR (011) and ADD (1xx) operations. Pins description:

1) GND - ground;
2) O0 - bit 0 of ALU operation;
3) O1 - bit 1 of ALU operation;
4) O2 - bit 2 of ALU operation (if it's "1" then O0 and O1 are ignored);
5) A - input bit A (always from accumulator);
6) B - input bit B (might be from register or number);
7) C - input bit C (carry);
8) H - higher bit for rotation right;
9) L - lower bit for rotation left;
10) COUT - carry out;
11) DOUT - data out;
12) VCC - power +5V.