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Non-Linear Systems manufactured and sold the first digital voltmeter. This is a video of one of their edge lit digital displays in operation. These early NLS digital meters used a resistor dividing network and relays to select the display digits. If you see one of these in operation you will hear a lot of mechanical relay noise as the range and digits are selected. NLS used this type of edge lit display until the mid 1960s
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Topic: Really cool Voltmeter (Read 1002 times)
