NOR GATE
Outputs ON only when ALL inputs are OFF. The inverse of an OR gate. Built by feeding an OR gate through a NOT gate. Fundamental to RS NOR latches (memory circuits).
Truth Table
| Input A | Input B | Output |
|---|---|---|
| 0 (OFF) | 0 (OFF) | 1 (ON) |
| 0 (OFF) | 1 (ON) | 0 (OFF) |
| 1 (ON) | 0 (OFF) | 0 (OFF) |
| 1 (ON) | 1 (ON) | 0 (OFF) |
How to Build
- 1Run input A and input B into the same solid block using redstone dust.
- 2Place a redstone torch on the output side of that block.
- 3The torch turns OFF when any input powers the block.
- 4Output is ON only when both inputs are OFF.
- 5This is the basis for the RS NOR latch memory circuit.
Build Variants
- ▸Single-block NOR (two inputs into block, torch on top)
- ▸Wall-mounted NOR (torch on side of block)
- ▸RS NOR latch (two cross-coupled NOR gates for memory)