{"title":"Water pump","description":null,"products":[{"product_id":"3v-vertical-submersible-water-pump","title":"3V Vertical Submersible Water Pump","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThis 3V vertical submersible low power water pump is an ideal solution for creating a small indoor water feature or as part of a plant watering system. At the heart of the pump is a 3V DC motor that runs quietly and only draws approximately 100mA.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/dNpVoGgEM9g\" height=\"315\" width=\"560\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe pump needs priming before use and should be kept fully submerged during use as it will only pump water not air. Also, it only works in one direction as a pump, you cannot reverse the connections and have it move water in the other direction. \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eIt's 3V, 100mA power requirements are such that you could use a microcontroller with suitable drive capacity to switch it on or off.  As the new micro:bit now has 200mA available for powering external devices, this pump can be powered directly by the micro:bit V2.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe micro:bit can only drive 15mA from its pins, so a transistor or FET is required to control it from the pins, either in an on\/off capacity, or, with \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/kitronik.co.uk\/blogs\/resources\/using-pwm-kitronik-motor-driver-board\" target=\"_blank\"\u003ePWM\u003c\/a\u003e to vary pumping rate. If using the original micro:bit or if the microbit is already controlling other devices, this pump can also be powered and controlled via a \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/www.etchkshop.com\/collections\/bbc-micro-bit\/products\/motor-driver-board-for-the-bbc-micro-bit-version-2\" target=\"_blank\"\u003emotor driver board\u003c\/a\u003e, or \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/www.etchkshop.com\/collections\/bbc-micro-bit\/products\/all-in-one-robotics-board-for-bbc-micro-bit\" target=\"_blank\"\u003esimilar\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong\u003eNote: This pump is not supplied with any tubing. You can buy lengths of \u003ca rel=\"noopener\" href=\"https:\/\/kitronik.co.uk\/products\/silicone-tube-for-use-with-6-12v-r385-diaphram-pump\" target=\"_blank\"\u003esilic\u003c\/a\u003e\u003ca href=\"https:\/\/www.etchkshop.com\/products\/silcone-tube-for-use-with-water-pumps\" target=\"_blank\" rel=\"noopener\"\u003eo\u003c\/a\u003e\u003ca rel=\"noopener\" href=\"https:\/\/kitronik.co.uk\/products\/silicone-tube-for-use-with-6-12v-r385-diaphram-pump\" target=\"_blank\"\u003ene tubing here.\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Kitronik","offers":[{"title":"Default Title","offer_id":37777180164251,"sku":"25110","price":21.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0214\/4060\/products\/25110_large-3v-vertical-submersible-water-pump_1000x_f5e75d98-d151-40c9-b7d7-8cf04903c523.jpg?v=1611554922"}],"url":"https:\/\/www.etchkshop.com\/collections\/water-pump\/under-1000.oembed","provider":"ETC Educational Technology Connection (HK) Ltd","version":"1.0","type":"link"}