MOSFET DIY NINJA LEVEL

thingiverse

As a result of the high currents that need to be managed to warm the bed, especially when working with materials such as ABS, it is highly recommended to have a device at our disposal in order to handle all that current and release our minds from that task. To do so, we can find relays (mechanical and SSR) or what is known as MOSFET electronic circuits, since they are their main element. If we focus on this second option, I suggest this mosfet that I have made by taking advantage of material which I already owned, and whose cost has been therefore zero for me. In any case, this material may end up being really interesting and economical when working by yourself at home. The mosfet I used is one that I had in my components drawer, although it could easily be another one, is a IRPF054, capable of handling 64A at 100 ° C continuously. The chosen transistor for the inverter is a BC547, a reference in signal amplification, so you shouldn't find it difficult to locate. This circuit, unlike the ones designed for commercial purposes, does require that we identify, in our card printer, the positive and negative connections to the "hot bed", as we will need to establish the connection to the negative pin in order to get the control signal. This doesn't happen in the commercial ones as they use a bridge rectifier, but as I have explained, the design is the result of using material which I already kept in my drawer, and the bridges I had resulted to be too large. As for the rest of the procedure, not much complication, just plug it according to the described electrical scheme and you'll get it ready to work. For those of you who want to make their PCB, I have made it available in Autodesk CIRCUITS: https://circuits.io/circuits/3670338-mosfet-hot-bed/embed#schematic If you make it, please share your photos :-).