Radio control apparatus with voice transmission capability

A radio controller for receiving radio transmissions and controlling movement of a model vehicle comprising:

• means for receiving a transmitting carrier signal modulated with vehicle control signals;
• control signal demodulating means for recovering said control signals from said transmitted carrier signal;
• a drive motor for propelling the vehicle;
• a power source;
• a power on/off switch;
• power control means coupled to said power source through said power on/off switch and coupled to said control signal demodulating means for controlling said drive motor in response to said control signals so as to vary the drive motor speed;
• and
• warning means for providing a warning signal when said power control means is not supplying power to said drive means when said power switch is switched on.

A radio controller for controlling toy vehicles, comprising:

• a transmitting section, said transmitting section including:
• (i) carrier signal generating means for generating a carrier signal;
• (ii) first modulating signal generating means for generating a first modulating signal;
• (iii) first modulating means for modulating said carrier signal in response to said first modulating signal;
• (iv) second modulating signal generating means for generating a second modulating signal;
• (v) second modulating means for modulating said carrier signal in response to said second modulating signal;
• (vi) transmitting means for transmitting a modulated carrier signal produced by said carrier signal generating means and said first and second modulating means;
• (vii) mode selector means for selectably enabling said first and said second modulating means, said mode selection means adapted to disable said carrier signal when disabling said second modulating means and enabling said first modulating means;
• and a remote receiver means located at said toy vehicle, said receiving section means including:
• (i) receiving means for receiving said modulated carrier signal transmitted by said transmitting means;
• (ii) first demodulating means coupled to said receiver means for demodulating said modulated carrier signal and producing a first demodulated signal which corresponds to said first modulating signal;
• (iii) second demodulating means coupled to said receiving means for demodulating said modulated carrier signal and producing a second demodulated signal which corresponds to said second modulating signal;
• and
• (iv) demodulator control means for placing said receiver section means in a first mode in response to said modulated carrier signal produced by said carrier signal generating means, independent of said first and second demodulated signals, and for placing said receiver section means in a second mode in response to said first demodulated signal, with said first demodulator being enabled when said receiver section means is in said first mode and said first demodulator being disabled when said receiver section means is in said second mode, said demodulator control means operable to place said receiving section means in said first mode in respose to a change in amplitude of said transmitted carrier signal.