We see the control board with 7-segment LED display for temp and power readout up in front. The obligatory fan mounted down in the base of the unit, and a lovely induction coil. Looks like about the same gauge Litz wire as the Burton unit but with a much nicer coil former. We`re hoping it`s not all glued together in a big shellac clump like the Burton, so the coil can be disassembled and re-wound into a cylinder.
Click here to download the full size of the above Circuit.
Aside from the melted black plastic formers, it APPEARS there`s nothing too troublesome holding the coil in place, which is a very encouraging sign. Next comes the power stage board. Again, very clean and simplified design. There`s the input filter/current feeding inductor up there in the upper left, the nice hefty blue caps for the resonant tank and feed tank, and MANY fewer components than the Burton. Compact, and probably much cheaper to produce. Ahh, the big boy himself. The venerable 25N120 IGBT. 25A and 1200V of pure power switching fury. A little slow for chopper based converters, but for this type of high current soft-switching application this device cannot be beat. It`s interesting that this cooker gets away with only a single IGBT not sure if it`s lower powered than the Burton, or whether only a single IGBT is needed to get enough power over there in 230V land. Lucky bastards! Again, cleaner and more compact. And nicely diagrammed in white silkscreen to make circuit tracing easier! Excellent! Ad has been kind enough to label a few of the power stage components for us in red, along with their values. So that`s it for the extended tour of the insides of the new device. We`ll continue on with the remainder of the original post from yesterday as we puzzle out the function of the power stage. But rest assured, we are now opening eBay and looking for this little gem to see for ourselves what treasures it holds. Let`s...
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.....
characters left: