02-09-2017, 01:37 PM
The circuit presented must be controlled, an electronic code-based lock for operation of the plurality of devices. The circuit uses a three-decimal coding for the operation of each device. Select for each unique device code the three-digit numbers from 101 to 999. Although this circuit can be used to control up to 999 devices, for the sake of simplicity, illustrated operation of only three units. Additional devices, if necessary, are provided through the 10-pin connector on the circuit connected to each other. For the operation of each device is a specific method of the device for operation of the shift lever is activated by the device code. Code selection: With three pushbutton switches, each assigned with a specific number, the dialed number is displayed on three 7-segment displays for a short period of time. When you select a device counter and the displays will be restored automatically. However, the selection device will remain engaged by the action of the relay, by means of a pair of its own contacts. A new selection is accompanied by a brief musical note. Also included are provisions for manual reset counters and displays.
The circuit consists of a timer 555 (IC1) which is connected as an astable multivibrator with a duty cycle of 50 percent and a clock period of one second. The output of IC1 is used as a counter CD4033 decade cum clock controller IC (IC2 of IC4) and Johnson-ring against IC CD4017 (IC5 by IC7). In fact, the clock signal is formed by more IC5 pairs IC2, IC3 and IC4 IC6, IC7 and more, by pressing on the switch S1, S2 and S3 routed respectively. The three groups (each comprising CD4033, CD4017 and 7 digits) together independently with reset pin 15 of CD4017 CD4033 and integrated circuits. Only Y-ring integrated circuits (CD4017) are high, while all other outputs (Y1-Y9) are low. At this point, the output of all the counters are also count CD4033, and therefore the screen 000th.
When the first clock pulse reaches all rev CD2033 CD4017 peer applied to high performance Y0 Y1. At the same time, the current number CD4033 equals from zero to one and the corresponding seven-segment displays 1 and moves to the second clock, high-performance Y2, counts the number of pairs increased by one and CD4033 shows the second corresponding sample El number can be up to nine clock cycles when output Y9 is high, and the display shows the corresponding 9th. The next (tenth) clock, again Y0 output is high and the display is also 0 Then the cycle repeats.
The outputs of the integrated circuit are CD4017 (IC5 by IC7) connected to three-pin inputs 3 N1, N2, N3 and IC8 interior (CD4073) ports. According to the desired code for each transaction unit, the compounds may be prepared according to the outputs of the integrated circuit used in the CD4017 door and to control the operation of the particular device. For example, if you want the device code to be 794, then connect the output of IC5 Y7, Y9 IC7 IC6 and Y4 Gates and N1. The output of gate N1 is connected to the control device number via a Darlington ground IC of ULN2003 (input pin 2 and output pin 15) DPDT RL1. When the relay RL1 energizes under the assumption that the switch S5 is activated, the relay locks as it receives the positive supply voltage with the switch and ground via a N / O contact As soon as a device agrees with the switch activated and the appropriate code is selected correctly, it can be done manually by pressing the appropriate button (S5, S6 and S7) to the OFF position to be activated.
Similarly to the control of other devices, the outputs of the gates N2 and N3 connected to the input terminals 3 and 4 IC of the relay driver ULN2003 and the output terminals 14 and 13 are connected to the relay RL2 and RL3 respectively. External free wheel diodes are not required by the relay coil, as they are built in the same ULN2003 IC.
The module includes automatic reset. The AND gate outputs are connected. OR wiring to claim 1 of the ULN2003 integrated circuit Pines using diodes D2 to D4 is Thus, when the output of a Y gate goes high, pin IC9 number too high. Thus the pin 16 to the low state and RL4 energize which in turn causes the positive supply, the. With the reset line, which extends to all CI counters (IC2 by IC7) When the counter is reset, the AND gate output is low and disconnects RL4. Simultaneously, the 000 screen is displayed again, because the counters are reset. Clear counters and the screen is not limited to the operation of a device with the action of locking the relay, as explained above.
In addition, when the circuit is automatically reset, as explained above, a musical tone will occur for about five seconds to indicate that the device is turned on. As mentioned above, the pin 16 ULN2003 currently lowered the counter is automatically reset by actuation of the relay RL4. The transition from the top to the bottom of the pin 16 is configured as ULN2003 also the activation pin 2 of the timer IC155 (IC10), which here passed as monostable 5 seconds. The output is connected to the musical tone IC10 IC UM66 (IC11), which generates a musical tone of monostable output pulses of 5 seconds.
The code is. Amounts entered using keys to change S1, S2 and S3 In cases where an incorrect code is entered, you can return to the correct code to manually reset the circuit by pressing the reset switch S4. With manual reset, the system will not produce a music note. During recovery, a high logic level is applied to 15 of the counters / pin IC segment of the counter / controller. Under normal circumstances, these contacts are reset to a low logic level.
The circuit shows the connection of three units; codes 794, 969 and 337 have respectively. To operate the device before resetting the counter by pressing the S4 button, invert switch S1, so that clock pulses are applied to the IC2 and IC5 pair, and start counting. Press S1 DIS1 for seven digits. In addition to pressing the switches S2 and S3 for the second and third position. The other two devices can also operate similarly.
To control more devices, simply add doors, ULN2003 Darlington boards, relays and switches. Do not forget, all the outputs and the door to connect the pin 1 IC9 diodes Automatic restart operation. The inputs of the Y gate can also be made to the outputs of the CD4017 integrated circuit obtained with terminated connectors as shown in the diagram of Figure 1. Because these devices are large fan-rated CMOS are (approximately 50 pieces) , each output can be connected to a number of doors without degradation of its performance. Each device is a unique code assigned to 001 through 999 (decimal). To extend the code, you can simply do it through the assemblies. The IC CD4017, CD4033, and a seven-segment Doors screen should. The same entry (or more) as the number of sets / numbers.
The actual size of one side of the printed circuit design diagram of Figure 1 is shown in Figure 2. Note that the circuit board does not contain relay / connected components C1 and IC9. They can mount on the printed circuit, and in general use, the number of devices that can be controlled by the user. The necessary elements have been made in BERG-STRIP connections. The arrangement of the components in the printed circuit is shown in Figure 3.
The circuit consists of a timer 555 (IC1) which is connected as an astable multivibrator with a duty cycle of 50 percent and a clock period of one second. The output of IC1 is used as a counter CD4033 decade cum clock controller IC (IC2 of IC4) and Johnson-ring against IC CD4017 (IC5 by IC7). In fact, the clock signal is formed by more IC5 pairs IC2, IC3 and IC4 IC6, IC7 and more, by pressing on the switch S1, S2 and S3 routed respectively. The three groups (each comprising CD4033, CD4017 and 7 digits) together independently with reset pin 15 of CD4017 CD4033 and integrated circuits. Only Y-ring integrated circuits (CD4017) are high, while all other outputs (Y1-Y9) are low. At this point, the output of all the counters are also count CD4033, and therefore the screen 000th.
When the first clock pulse reaches all rev CD2033 CD4017 peer applied to high performance Y0 Y1. At the same time, the current number CD4033 equals from zero to one and the corresponding seven-segment displays 1 and moves to the second clock, high-performance Y2, counts the number of pairs increased by one and CD4033 shows the second corresponding sample El number can be up to nine clock cycles when output Y9 is high, and the display shows the corresponding 9th. The next (tenth) clock, again Y0 output is high and the display is also 0 Then the cycle repeats.
The outputs of the integrated circuit are CD4017 (IC5 by IC7) connected to three-pin inputs 3 N1, N2, N3 and IC8 interior (CD4073) ports. According to the desired code for each transaction unit, the compounds may be prepared according to the outputs of the integrated circuit used in the CD4017 door and to control the operation of the particular device. For example, if you want the device code to be 794, then connect the output of IC5 Y7, Y9 IC7 IC6 and Y4 Gates and N1. The output of gate N1 is connected to the control device number via a Darlington ground IC of ULN2003 (input pin 2 and output pin 15) DPDT RL1. When the relay RL1 energizes under the assumption that the switch S5 is activated, the relay locks as it receives the positive supply voltage with the switch and ground via a N / O contact As soon as a device agrees with the switch activated and the appropriate code is selected correctly, it can be done manually by pressing the appropriate button (S5, S6 and S7) to the OFF position to be activated.
Similarly to the control of other devices, the outputs of the gates N2 and N3 connected to the input terminals 3 and 4 IC of the relay driver ULN2003 and the output terminals 14 and 13 are connected to the relay RL2 and RL3 respectively. External free wheel diodes are not required by the relay coil, as they are built in the same ULN2003 IC.
The module includes automatic reset. The AND gate outputs are connected. OR wiring to claim 1 of the ULN2003 integrated circuit Pines using diodes D2 to D4 is Thus, when the output of a Y gate goes high, pin IC9 number too high. Thus the pin 16 to the low state and RL4 energize which in turn causes the positive supply, the. With the reset line, which extends to all CI counters (IC2 by IC7) When the counter is reset, the AND gate output is low and disconnects RL4. Simultaneously, the 000 screen is displayed again, because the counters are reset. Clear counters and the screen is not limited to the operation of a device with the action of locking the relay, as explained above.
In addition, when the circuit is automatically reset, as explained above, a musical tone will occur for about five seconds to indicate that the device is turned on. As mentioned above, the pin 16 ULN2003 currently lowered the counter is automatically reset by actuation of the relay RL4. The transition from the top to the bottom of the pin 16 is configured as ULN2003 also the activation pin 2 of the timer IC155 (IC10), which here passed as monostable 5 seconds. The output is connected to the musical tone IC10 IC UM66 (IC11), which generates a musical tone of monostable output pulses of 5 seconds.
The code is. Amounts entered using keys to change S1, S2 and S3 In cases where an incorrect code is entered, you can return to the correct code to manually reset the circuit by pressing the reset switch S4. With manual reset, the system will not produce a music note. During recovery, a high logic level is applied to 15 of the counters / pin IC segment of the counter / controller. Under normal circumstances, these contacts are reset to a low logic level.
The circuit shows the connection of three units; codes 794, 969 and 337 have respectively. To operate the device before resetting the counter by pressing the S4 button, invert switch S1, so that clock pulses are applied to the IC2 and IC5 pair, and start counting. Press S1 DIS1 for seven digits. In addition to pressing the switches S2 and S3 for the second and third position. The other two devices can also operate similarly.
To control more devices, simply add doors, ULN2003 Darlington boards, relays and switches. Do not forget, all the outputs and the door to connect the pin 1 IC9 diodes Automatic restart operation. The inputs of the Y gate can also be made to the outputs of the CD4017 integrated circuit obtained with terminated connectors as shown in the diagram of Figure 1. Because these devices are large fan-rated CMOS are (approximately 50 pieces) , each output can be connected to a number of doors without degradation of its performance. Each device is a unique code assigned to 001 through 999 (decimal). To extend the code, you can simply do it through the assemblies. The IC CD4017, CD4033, and a seven-segment Doors screen should. The same entry (or more) as the number of sets / numbers.
The actual size of one side of the printed circuit design diagram of Figure 1 is shown in Figure 2. Note that the circuit board does not contain relay / connected components C1 and IC9. They can mount on the printed circuit, and in general use, the number of devices that can be controlled by the user. The necessary elements have been made in BERG-STRIP connections. The arrangement of the components in the printed circuit is shown in Figure 3.