|
Arabic
Bengali
Chinese
English
French
German
Hebrew
Hindi
Italian
Japanese
Korean
Malay
Polish
Portuguese
Spanish
Turkish
Ukrainian
Vietnamese|
ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING Electronic Cube. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Beginner radio amateur [an error occurred while processing this directive] The construction described below performs the functions of a game die, but has the advantage over it that it does not require a real die to be thrown on a horizontal surface. The basis of the device is an indicator consisting of seven LEDs HL1-HL7 (Fig. 1), arranged so as to highlight the configuration of any of the six faces of the cube. In accordance with the block diagram (Fig. 2), the device contains a pulse generator, a counter, a code converter (decoder) and the aforementioned LED indicator.
The schematic diagram of the device is shown in fig. 3. On the elements DD1.1-DD1.3 of the DD1 microcircuit, a pulse generator is assembled according to the standard scheme. The pulses are fed to the input C2 (output 1) of the counter, made on the chip DD2. Thanks to the feedback to the inputs & and R (pins 3 and 2), the counter works with a conversion factor of 6. Diodes VD1-VD5, element DD1.4 and elements of the DD3 chip form a binary code converter into the "code of the faces of the cube". The signals of the latter are fed to the LEDs HL1-HL7, indicating the dropped number. Resistors R2-R8 are installed to limit the current through the LEDs. The device works like this: while the contacts of the SB1 pushbutton switch are open, the generator sends clock pulses to the counter and the LEDs on the indicator switch with high frequency, indicating the "faces of the cube" sequentially from 1 to 6. As soon as the SB1 contacts are closed, pressing the button, the generation of pulses will stop . At the outputs of the DD2 chip, a number in binary code will be fixed, and on the indicator - the corresponding "dropped number". Thus, to "start" the cube, you must turn it on with switch SA1, and to stop it, press the switch button SB1. Now let's say a few words about the design and details of the device: DD1 and DD3 microcircuits - K155LAZ, K555LAZ; DD2 - K155IE5, K555IE5; diodes VD1 - VD5 - KD522B or series KD102, KD103; resistors R2-R8 any, suitable in size, with a nominal value of 120 to 470 ohms (the brightness of the indicator diodes depends on their resistance); capacitor C1 must be ceramic, it is permissible to replace it with an oxide capacitance of 1 ... 2 μF. In the absence of such capacitors, two oxide polar (electrolytic) capacitors can be used by connecting them in series, "towards" each other. All parts of the electronic cube, except for the pushbutton switches SA1, SB1 and the battery, are mounted on a printed circuit board measuring 57x70 mm, a sketch of which is shown in fig. 4.
The whole structure is placed in a plastic case of suitable dimensions (Fig. 5). The device receives power from a flat battery with a voltage of 4,5 V. The current consumption when using K155 series microcircuits is approximately 40 mA.
In conclusion - about expanding the gaming capabilities and changing the scheme of the cube. If the capacitance of the capacitor C1 is increased to 50-100 μF, and instead of the constant resistor R1, a variable one with a large resistance is installed, then the switching frequency of the indicator can be changed over a wide range. Then, at low values of the resistance of the resistor R1, the dropped value on the indicator is random (the device performs the function of a cube). With large values of the resistance of the resistor R1, the switching frequency of the "faces of the cube" decreases, which will allow you to visually control and fix the number on the indicator (reaction games). The device can be significantly simplified if the counter is excluded from the block diagram (see Fig. 2) and the generator pulses are immediately converted into indicator codes. This can be achieved using three D-flip-flops, for example, those included in the K155TM8 chip, by connecting them to a ring counter. The scheme of the modified device is shown in fig. 6, and the timing diagram of the outputs of triggers (points A, B, C and D) - in fig. 7.
The pulse generator is assembled on the logic elements of the DD1 chip. Rectangular pulses from its output (pin 8) are fed to the counting input of the DD2 chip (pin 9). On the front of the fourth pulse, thanks to the feedback through the DD1.4 element, the triggers are reset to zero (at the beginning of the seventh cycle). Otherwise, the operation of the device is the same as the previous one. The printed circuit board for this version of the electronic cube was not developed. Author: D. Mamichev, p/o Shatalovo-1 Pochinkovsky district. Smolensk region
Traffic noise delays the growth of chicks
06.05.2024 Wireless speaker Samsung Music Frame HW-LS60D
06.05.2024 A New Way to Control and Manipulate Optical Signals
05.05.2024
▪ Building material from plastic waste ▪ Supermassive black hole discovered
▪ section of the site Security and safety. Article selection ▪ article Brave New World. Popular expression ▪ article Who Invented Champagne? Detailed answer ▪ article Instructor of a cultural and educational institution. Job description ▪ article Piezoelectric effect. Encyclopedia of radio electronics and electrical engineering
Home page | Library | Articles | Website map | Site Reviews
www.diagram.com.ua |
See other articles Section 
Latest news of science and technology, new electronics:
All languages of this page