/sci/ - Science & Math

>>5574010
>How do you guys find motivation to go through the slough?

Think of your education as acquiring tools you can use to do things. You can do some interesting creative things with electronics or find yourself a good job. If you have no interest in ever doing anything with the knowledge you're getting at least feel good about understanding how the world around you operates.

>>5241354
Electronics engineer here. If you want to do radio control you can get a pair of RF transceiver modules from Sparkfun and a microcontroller (arduino is good for hobbyists). Or you could be hardcore and design your own radio control circuits.

I'll start with the receiver end. A radio control signal is some tone carried on a carrier wave. You build an LC circuit to pick up the carrier wave from the anteana. The LC resonance needs to match the frequency of the carrier wave. The anteana should be about half the wavelength of the carrier wave. Now to pick out different tones you need a bandpass filter, which is an opamp combined with some capacitors and resistors.

On the transmitter end you probably want to generate your carrier wave with a crystal oscillator. You can generate tones with a 555. Combine the signals with an analog adder. You want to push the modulated signal into an H-bridge r half bridge circuit to increase the power, although that isn't even necessary if you don't need a lot of distance.