| 摘要 |
<p>PURPOSE:To order a commodity efficiently by oscillating a signal of a frequency corresponding to information read by a bar code reader from an oscillator, transmitting an oscillated output to a person receiving the order via a telephone line and outputting a message from the said person from a speaker. CONSTITUTION:An output of the bar code reader 3 using an LED as a light source and executing threshold value processing and digital conversion or the like at a person placing an order is fed to an oscillation circuit 8 comprising an IC via a latch circuit and a switch circuit 7 comprising a decoder circuit. The circuit 8 generates a signal in corresponding two frequencies to numerical information applied one after another. The signals are amplified (9) and then fed to the speaker 4 and transmitted to the person placing an order of the commodity via a transceiver. Further, a microphone 5 amplifies (10) the message transmitted from the person receiving the order of the commodity and gives the result to the speaker 6. When a normal commodity code, a quantity code and a delivery date are inputted from the person placing the order, a message confirming them is returned from the person receiving the order.</p> |
