Simple 2-channel Remote Control

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Hi,

I wanna to make a simple 2-channel remote control with the range around 10>meter. I already found one simple Magnetic-Radiation Remote-Control from net. It only support 4-5meter.

May i know is it possible we do some modification on this design for boost the signal up and let the transceiver more longer range? I interested on this design because the transmitter circuit is small and simple. I hope the transmitter can be design smaller because i wan it to be handheld.

https://www.electronics-lab.com/projects/science/011/index.html

Do you have any sample circuit for remote control? Please help me...

Thank You.
 

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