This device provides precise current step control for electronic test setups, combining a fine tuning mode and a coarse adjustment mode with configurable coefficients. It features a Big Nixie tube display and an encoder button for intuitive operation. Key features and benefits Dual adjustment modes for flexible current scaling Fine tuning mode adjusts the last digit by plus or minus 1 Coarse adjustment mode adjusts the penultimate digit by plus or minus 1 Each mode uses its own adjustable coefficient for precise control Fixed coefficients for stable performance Fine tuning coefficient is fixed at 150 Coarse mode coefficient is fixed at a certain value (not specified in the text but no longer configurable) Per pulse current range Minimum per pulse current is configurable down to 0.01 mA Maximum per pulse current for coarse adjustment is configurable up to 5.00 mA Clear readout and accessible controls Big Nixie tube display provides readable current values Encoder button enables straightforward adjustment and selection Function and performance Provides precise and scalable current adjustments in small increments or larger steps Independent configuration of fine and coarse modes allows optimization for different test tasks Readable display and tactile encoder control support reliable operation in busy lab environments Compatibility and applicability Designed for use in electronic test rigs, lab benches, and development setups requiring per pulse current control Suitable for applications where fine and coarse current adjustments are needed in a single device Size, material, and physical characteristics Specific physical dimensions and enclosure material are not stated in the available information Use scenarios Scenario 1: Calibrating bias currents in a precision lab power supply Use fine tuning to make small, accurate adjustments to the last digit, and coarse mode for faster range changes when broad alignment is needed Scenario 2: Fine tuning LED driver current during development Leverage the separate coarse and fine coefficients to quickly navigate large current changes and then polish to the exact target Scenario 3: Current pulse testing in sensor and signal conditioning circuits Set the minimum per pulse to 0.01 mA for low current tests and use the 5.00 mA per pulse coarse limit for higher current pulses as needed Notes The device emphasizes precise current stepping, clear display readouts, and intuitive encoder based adjustments Values and configuration options are specified per pulse, enabling consistent results across test cycles