Hello! I'm a long time reader, but this is the first time I've not been able to find the information I've needed already... I have a small electromagnet that needs to have an AC current (it is essential that the electromagnet has a reversing polarity) but the source of power comes from a 6v battery. I know I need an inverter, but all the inverters I can find are converting 12v to 220v AC - which seems to be slightly excessive (and expensive) considering that the electromagnet itself is no bigger then a penny. Does anyone have any ideas? Is there something I can make myself, or something cheap that I can purchase? I can use a 9v battery, if thats required, but everything about this project needs to be kept fairly small. My knowledge of circuits and electronics is minimal, so please use small words (and maybe pat me on the head to tell me I'm doing a good job). Many thanks!