The bell plunger occasionally gets stuck, but I've since fixed that with some WD40. Here is another video where I am triggering the bell manually from the computer. For Windows, the Thunderbird mail client works perfectly for this, or alternatively a utility called POP Peeper (more on this later). ![]() Note: the bell does not check your email for you you will need some sort of program on your computer to check your email and then activate the bell when you receive new mail. And of course a computer (sorry, I only supply source and binaries for WIndows, the bell appears on a computer as a generic USB HID device, for which all modern operating systems have drivers built in for, so it would be relatively easy to code it for Linux or Mac). You will also need a soldering iron, some type of tape or adhesive to attach things to other things, and possibly some kind of cutting tool to cut a slot out of the base of the bell for the USB plug. A Forebrain (LPC1343 microcontroller) dev board (or you can use an alternative microcontroller/dev board if you want to have a go at coding it yourself) A diode (flyback diode, as safety to avoid things blowing up)ħ. A large capacitor (because USB probably won't supply enough power in one go to fire the electromagnetĦ. Some thin (less than 26 AWG) enamelled wire (about 2m)ĥ. A short bolt (to make a solenoid/electromagnet)ģ. A counter bell of some sort with a steel clapperĢ. ![]() knowledge of programming is entirely optional if you use the same microcontroller as I do since I've made all the code and firmware online so you can quickly download it and load onto the microcontroller over USBġ. soldering - you'll need to solder just six electrical components togetherģ. ![]() & amp amp amp amp amp amp amp lt br /& amp amp amp amp amp amp amp gt ġ.
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