# Half adder

The half adder adds two single-digit binary numbers (each 1 bit) and outputs a carry, where applicable. It has the label HA.

The two inputs A and B represent the bits to be added. The output S (sum) represents the last digit of the sum and the output C (carry) represents the carry.

Truth table

A | B | S | C |
---|---|---|---|

0 | 0 | 0 | 0 |

0 | 1 | 1 | 0 |

1 | 0 | 1 | 0 |

1 | 1 | 0 | 1 |

Adjustable parameters

Designation | Range | Default value |
---|---|---|

Voltage level (lo) | 0.1 ... 24 V | 0.8 |

Voltage level (hi) | 0.1 ... 24 V | 2 |

Designation | Range | Default value |
---|---|---|

Voltage level (lo) | 0 ... 24 V | 0 |

Voltage level (hi) | 0.1 ... 24 V | 5 |

Resistance | 0.1 ... 1000 Ohm | 50 |