2/18/2023 0 Comments Piezo violinYou don’t have to carry out much configuration, it is ready for use, you just flip the power switch and it comes on. It can connect to any oscilloscope with a standard 1 MΩ input impedance via the provided SMA to BNC cable. The amplifier is controlled by a PIC microcontroller, enabling automatic zeroing and offset adjustment as well as gain and bandwidth switching. The output of the AMR sensor is amplified by low noise, high bandwidth amplifier to provide the correct signal level for oscilloscopes. This enables accurate current sensing despite variations in the test setup. The synergy between the current in the wire and the magnetic field in the air gap varies little as the wire moves around the center of the toroid. It is also equipped with a ferrite toroid with an air gap in which the sensor tip rests. It features a clip, which enables current sensing by translating the current in a wire into a magnetic field. The AMR sensor functions by sensing magnetic fields, producing a voltage proportional to the magnetic field strength. Little Bee offers the same level of performance, but with a much lower cost. Thanks to its Anisotropic Magneto-Resistive (AMR) magnetic sensor, Little Bee’s performance can be compared to other current probes based on fluxgate magnetometers, and probes with hybrid features that offer AC current transformers with DC hall effect sensors. Little Bee can function as a traditional current probe, providing isolated measurements of the current in a wire with higher accuracy, and It can also measure currents over a wide bandwidth: from DC to the MHz range. “We hope to make the world of power electronics accessible to more people by delivering a much-needed piece of test equipment as open hardware and at an affordable price.” Regarding the aim of the project, the company says: Current probes are gaining ground today because of the popularity of power electronics like electric vehicles, alternative energy, and high-efficiency power supplies. This device comes in handy because current probes available today are expensive, therefore having a limited number of users. Little Bee is an affordable and high-performance current probe and magnetic field probe that enables you to debug and analyze electronic devices more effectively. A campaign for a current probe called Little Bee was launched on Crowdsupply.
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