I bought a Doepfer LMK3+ keyboard from a very pleasant chap in Dunedin, via TradeMe, a popular New Zealand auction site. The keyboard features a nice, piano-like Fatar keybed in a rugged flight case. Here`s a photo of another LMK3+, taken from a recent auction on German eBay : I didn`t pay very much for mine, because it was missing the MIDI interface. The previous owner
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liked the knobs and wheels so much that, after changing to a different keyboard, he had the interface removed and placed in a stand-alone box. So, the end of mine looks like this: Also, the flight case is devoid of labels, so I have no way of confirming that it`s actually an LMK3+ (with the uprated keybed) rather than an original model LMK3. I have emailed Doepfer, and they told me that they stopped producing the LMK3+ in 1993 and that they have no suitable parts for it. Consequently, it looks like I will need to build my own interface to the keybed. (I`m assuming that if the previous owner was prepared to part with the interface, he would`ve put it back in the keyboard and sold it as a complete working unit for a lot more money. ) After taking the keybed out of the flight case and cleaning it up, I was able to find the label with (I assume) the serial number and the date of construction ("montaggio" apparently means "assembly"): I was hoping to find a part number that I could use in my quest for technical specifications on the keybed interface, but I haven`t seen anything like that. I can see how the switching for the keys works: when a key is pressed, a piece of wire breaks a contact with one jumper and then makes contact with a second jumper. (This is hidden behind the leftmost aftertouch sensor in the photo above. ) The timing between the break and the make gives you the key velocity. What I don`t know is how the 88 key...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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