For the transmitter, he turned an Arduino Pro Micro into a USB sound card which he could plug into his laptop. That outputs both the audio signal and a 40 kHz carrier signal, implemented using the ...

I found that we could get the radio to reach the length of a 60ft bowling alley, but it worked best with one long range version as the receiver, and a standard module for transmitting.

Figure 1 shows the transmitter based on the microcontroller PIC16F1619. Pushbuttons PB1 thru PB4 are enabled to control four relays in the receiver module in Figure 2.

Finisar's XFP-RF optical transmitter module is optimal for Dense Wavelength Division Multiplexing (DWDM) applications, which dramatically increase bandwidth over existing fiber infrastructure by ...

The HX1 from Radiometrix is a narrow band VHF radio transmitter module designed for use in various data-transfer applications. When used in conjunction with the matching RX1, BiM1R, or CVR1 receiver ...

Long-range RC transmitter “I started using Bluetooth devices like the HC-05 modules, but I found that these sometimes randomly disconnected.

It has an RF front end for up and down-link , a digital baseband and a microcontroller in the same device. The transmit path uses a closed loop fractional-N modulator, while a serial peripheral ...