Urban and rural areas catering industry is very prosperous, but the catering industry is very low level of modernization. This borrowing Bluetooth technology in the "Bluetooth", meaning short-range wireless communications, application of common integrated device designed to the customer according to a la carte menu number options for the chef by a single cooking, with a total station by a single checkout, the customer according to a single payment completely avoid the customer to take a pen behind the paper a la carte approach to fill orders.
Application of the e-menu when you were only asked to publish recipes with the uniform number, such as using three-digit number is expressed as 001,002 ... ... 999. This choice of three digits can be prepared as many as 999 growing vegetables, its circuit principle shown in Figure 1, as shown in Figure 2.
Figure 1 constitute the menu, enter the code transmitter. IC for the DTMF encoding Manifold (MT5087). Press the numeric keypad when ordering in the Clear key q (actually 4 binary code 1111 to generate the keys, other keys can not produce the binary code), resetting principle described in Figure 2, and then the chosen cuisine 3 serial number from left to right according to the corresponding button numeric keypad, IC's (16) feet that is the output of each digital synthesis of the corresponding pairs of audio signals, plus modulation components to the launch after launch of the wireless signal from outside. Wireless transmit / receive many different types of components, the text selected TWH630/631.
Figure 2 constitute the reception, decoding, display the menu circuit, and each menu can display the maximum number of dishes can be determined by need. This paper designs a maximum of 16 vegetables. The article by IC1 (YN9102) mainly consist of decoding circuit: the IC2 (CD4017) mainly consist of name of the dish serial position control circuit; to IC3, IC4 (CD4017) mainly consist of wrap (change name of the dish) control circuit; IC6 ~ IC59 (CD4511) and the seven-segment digital tube constitutes a seven-segment decoding, latched, driver, display circuit; and gate Y, IC5, V1, V2, J, and RC components constitute a la carte alarm, resetting the circuit. Machine works as follows:
Boot from the R5, C4 respectively, constitute a reset cleared the circuit acting on the IC2, IC3, IC4 of (15) feet of natural Clear, full-screen to zero. Boot or have already had some points, dishes under any circumstances, the customer when ordering, press the q key, launched by the transmitter outside the binary code 1111 dual audio synthesis of signals received and demodulated by the receiver component derived from the DTMF signals into the decoder IC1 and from (11) ~ (14) pin output 1111. Y 4 and gate under the action of this four high output high, while acting on the IC2 (13) feet inhibit its count input, the other integrated circuits IC5 audible alarm triggered by music, (sound content optional Didi or post-recorded sound such as "Please note that, to a la carte!", etc.); at the same time so that V1 conduction through the R3, relay J Pick-up, and often close contact J1 disconnected, the whole power, relay J again release, J1 once again closed the restoration of electricity, equivalent to re-boot cleared once. IC3 is high at this time of Y0 and with 1,2,3-linked and non-gate. Then customer number by selecting the name of the dish input three numbers from left to right. Such as the 115, the same as with the aforementioned encoding transmitter and receiver decoding, in IC1's (11) ~ (14) feet followed by the three groups corresponding to the binary output code 0001,0001,0101. When the first group of output IC1 output of the (15) feet high pulse as a count of IC2 to their (14) feet, IC2 count Y1 output after the high, after C7, R8 and IC3 of the Y0 differential acting on the non - RP-door 3 so that, as IC8 the latch signal decoding via IC8 driver in the seven-segment digital tube displays the 0001 corresponds to the decimal number 1. Similarly the second group, third group showed the corresponding output decimal 1,5. And the output latch 0101 in the third group show at the same time, IC2 of Y3 becomes high through the R6C5 differential, on the one hand, as the Zero-cycle pulse IC2 to reset the other hand, as IC3, IC4 count pulses to IC3's Y1 becomes high and with 4,5,6-linked and non-gate. When the second name of the dish number three groups of binary code output, and non-inverting gate 4,5,6 one after another, the corresponding IC11, IC10, IC9 work, and when the third group also cleared IC2 output reduction, IC3 is again a count of pulses so that Y2 is high ... ... so it goes. When the ninth serial losers when the name of the dish, IC3 becomes high in Y9 to their (13) feet to IC3 ban count, at the same time by the non-inverting gate F to IC4 start counting, and to make IC4 of the Y1 becomes high. And later recycling to food until they reach 16, this time the whole entire menu significantly. Chef would then single-cooking, customers clearly on a single income dishes, with a total station on a single settlement.
The circuit components used no special requirements, according to the text before the above model and shows marked preferences, and doors, and non-gate, or gate, NAND gate CD4000 series can be selected. Production will be 54 seven-segment digital tube for each group of three came in a plate, with a good adhesive to form a digital screen.
Common power supply can be three-terminal regulator device.
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