Cheap function generator options.

[chayced]

I'm playing around with a toroidal coil and eventually want to use it for some wireless power transfer experiments. My problem is that i need a function generator that can output around 1-5 mhz, and they are kinda pricey. I'm not going to need to know the precise frequency I'm producing, just to be able to sweep it through a range until I hit resonance. Anyone have any suggestions? I'm really looking for an option under $50, because if I go much over that I might as well spend the money on a used unit off eBay.

Thanks in advance!

 

[seang]

once i made a quick and dirty fg with a PIC. You can try this, but it may be difficult to produce a decent 5 MHz sine wave; got a scope?

A 1 MHz sine wave is probably do-able.

You could also hit the torroid with an impulse, collect data with a dsPIC, and then fft.

hopefully someone more knowledgeable than I will give you some help.

cheers

 

[oswaler]

I would recommend considering purchasing a used function generator on eBay as it may be the most cost-effective option for your specific needs. However, if you are set on finding a cheap option under $50, I suggest researching DIY function generator kits or building your own using inexpensive components. Keep in mind that the accuracy and precision of your frequency output may not be as reliable with these options compared to a more expensive, commercially available function generator. Additionally, consider reaching out to colleagues or other scientists in your field to see if they have any recommendations or resources for affordable function generators. Good luck with your experiments!