Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: /editorialstandardsĪdafruit is on Mastodon, join in! /mastodon Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. We do see a feedback resistor divider on the output side using 0603 SMT resistors so an advanced user could solder in different values to turn it into a 3.3V output.Īdafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. We don’t have any datasheets or specifications for them. These are basic modules, probably used for some low cost toy. The quiescent current is about 70mA at all time, even when the other coil is not anywhere near by. If you draw 5V 100mA on the output side (0.5W), you’ll need 0.5W * 2.5 / 9V = ~150mA from the input end. Only about 40% of the energy in shows up on the other end, but for low power or charging project. (This is why the electric toothbrush must fit into the plastic holder, it’s lining up the two coils for best efficiency)īecause its an air-core transformer, it’s fairly inefficient. The coils do need to be fairly co-axial, try to get them to be parallel and have the circles line up for best power-transfer. The material doesn’t affect the distance or efficiency. Any non-ferrous/non-conductive material (eg air, wood, leather, plastic, paper, glass) can be used between the two coils. For 10mA draw, the coils can be up to half an inch (12.5mm) apart. If you only need 100 or 200mA you can be up 7mm apart. You can draw as much as ~500mA if the coils are 2 or 3 mm apart. This is a basic charger set, and it does work, providing 5V DC output from the output half when the input half is powered with 9V to 12VDC. These chargers work by taking a power transformer and splitting it in half, an AC waveform is generated into one, and couples into the second coil. Most people have seen inductive charging in a rechargable electric toothbrush: you may have noticed that you recharge it by placing it into the holder, but there’s no direct plug. Inductive charging is a way of powering a device without a direct wire connection.
NEW PRODUCT – Inductive Charging Set – 5V 500mA max.
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