The circuit was developed to create a voltmeter that will be used to test car batteries while showing an indication using LEDs. Voltmeter – a device or an instrument used for measuring the electrical ...
This circuit uses two National Semiconductor LM3914 dot/bar-display-driver ICs to implement a two-digit, 0 to 5V LED voltmeter that mimics a subranging flash ADC. An LED bar graph comprising five LEDs ...
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