Here's a circuit that runs current through it's output and charges a capacitor when connected to power. When power is lost, the capacitor discharges and current continues to flow through the circuit's output.

Problem: Current diminishes following RC constant when disconnected. Instead, redesign so the output current is constant until a point where it drops down to zero.

This piece of tech is a security system whose alarm activates once a beam path is broken. Using photoresistance, a high voltage pulse is sent to the memory element such that the buzzer is triggered along with the drop in resistance. The alarm blares until the reset switch is pressed.

The backup generator makes an appearance in this system too! If the alarm is disconnected from power, current runs through a 555 oscillator output to a transducer. The frequency needs adjustment, it's hard to hear the backup alarm in a recording.

In the 1960's, IBM designed a system for engineers to simulate the circuits they designed without having to construct and test by-hand. This revolutionized the industry and allowed for testing without the need for components and with no risk of injury. Users would fill punched cards with circuit branches (connections between nodes), component types (i.e. voltage source, resistor, capacitor, etc.), and component values. Then, the computer would spit out calculated values of interest across each branch.

This repo holds an attempt to emulate the product. For now, the project is more or less a straightforward acyclic loop finding algorithm.