This is an AM radio transmitter I made in early high school. It can broadcast a CW signal for morse code or you can plug it into your laptop and play music on an AM receiver. It also has a receiver in it just for kicks. It can broadcast between about 600 KHz and 900 Khz, depending on what you want. It works pretty terribly because this is the first electronics project I made (I really jumped into the deep-end first with this one). It does work, albeit terribly. Frankly, it is a testament to the resilience of radio as a form of communication because this radio is so poorly designed that if it can work at all, radio technology must be pretty resilient.