DIY Janko Piano: 6. Electronics скачать в хорошем качестве

DIY Janko Piano: 6. Electronics

Every digital piano needs some way of recording key stroke information along with the given velocity before outputting it in a MIDI format that will then be used to construct the sound that you actually hear. In this episode I want to cover exactly how this process is done in my DIY Janko piano, along with how it differs from common digital pianos due to my decision to include a full acoustic action and measure the key velocity at the end of the hammer's swing. In general I decided on using two sets of sensors: 1. A set of two optical switches placed near the end of the hammer's swing path that get triggered consecutively and thus record the speed at which the hammer was traveling at that point in time - which is then used to specify the note velocity. This is very similar to what is used in most digital pianos, though in more expensive ones three sensors are used to prevent ghosting - something I dont need to worry about due to the design of the action. 2. A magnetic sensor that records the exact position of the key to the nearest 0.1mm. When used in conjunction with the optical switches its main purpose is to send the note-off signals - signaling when the key is released by the player and thus when the note needs to be quieted. Alternatively it can be used standalone in order to also send the note-on signals, with the velocity data being derived from the key position a fraction of a millimeter before the key bottomed out. As for the rest (communication, board design, manufacturing, etc)... I go over it in the video or alternatively in the forum listed below. Introduction: same as 0:teaser. Project discussion forum: https://pianoclack.com/forum/d/1825-d... Electronics and sensors discussion forum: https://pianoclack.com/forum/d/1883-d...