DTMF key 4 or 8 channels

DTMF key 4 or 8 channels

We propose in this paper a DTMF remote control of the third generation made ​​with the new ST6265 microcontroller provided with an internal EEPROM. This device can turn on or off, via radio or telephone, any electrical device. It is possible to remotely change the password and all operational parameters of the key.

A spectrum analyzer with tracking

A spectrum analyzer with tracking

To calibrate a transceiver, RF control filters, adjust the antennas, determine the number of harmonics generated by an oscillator, evaluate possible pollution HF, etc.., A spectrum analyzer, the only instrument able to view the screen a high frequency signal whatever is needed. Since the cost in trade, such a device is prohibitive for the stock of an amateur, even enlightened, we have "floored" the realization that we propose here and whose price / performance is that excellent!