$3.00
A simple module that provides two pairs of logarithmic/linear-mode meters (showing positive and negative values) in a small form factor that can support the range -1V to +1V, -5V to +5V or -10V to 10V. The meter can also measure the range of a waveform showing the positive and negative maximum values over time (with a reset button).
Also sold as part of Andrew Macaulay's General Utility Collection and included in Andrew Macaulay's Ultimate Bundle.