Memory trainer. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Memory trainer. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Beginner radio amateur

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The proposed device is designed to train attention and short-term memory. The prototype for its creation was the popular game in the USA "Simon Says", which has nothing to do with electronics, where it is necessary to repeat the sequence of actions of the presenter.

The basis of the device is a microcontroller that controls the LEDs. The player sees the sequence of LEDs lighting up and must try to repeat it by pressing the appropriate buttons. Since the glow time of the LEDs is limited, not only memory is trained, but also the speed of memorization. The game has 25 levels, the difficulty of which gradually increases. Despite the simple conditions, it is not so easy to repeat the sequence proposed by the microcontroller, starting from the 6th - 7th levels.

The scheme of the device is shown in fig. one.

Memory trainer

The microcontroller DD1 works according to the program, the codes of which are presented in the table.

(click to enlarge)

The RBO-RB5 port lines are programmed as outputs and control the HL1-HL8 LEDs. The number of LEDs that light up is determined by the level of the game, the sequence of their lighting is random and depends on the moment the player presses the "Start" button, so it will be different at each start. The RDO~RD6 port lines respond to pressing the SBI-SB8 buttons. To start the game at each level, press the SB9 button, and SB10, SB11 are used to speed up or slow down the pace of the game.

The player presses the button SB9 "Start", looks through the sequence of LED lights and repeats it. Success is accompanied by a light effect - "running fire" clockwise. After that, the number of the next level is indicated by the number of successively lit LEDs. With the level number. greater than the number of LEDs, their blinking becomes somewhat steep. Then you need to press the "Start" button again, and so on until the first error, which is indicated by "running fire" counterclockwise, after which you return to the beginning of the game

Some of the parts are installed on a printed circuit board made of one-sided foil fiberglass 1 ... 1.5 mm thick, the drawing of which is shown in fig. 2.

Memory trainer

Resistors - MLT C2-23, capacitors - KI0-17, KM-5. In addition to the LEDs indicated in the diagram. you can apply KIPD2Sh-K. Buttons - PKn159 with a long pusher, power switch - any small-sized. The LEDs and buttons are mounted on the front panel of the housing made of thermoplastic plastic (Fig. 3), and the SB1 button, etc. is located next to the HLI LED. Holes are made for the LEDs and button pushers. LEDs are inserted into the holes and glued. The pushers of the buttons are installed in the holes, and the leads are bent and melted into the panel with a soldering iron. The SA1 power switch is located on the side wall.

Memory trainer

The device is powered by a 4,5 V battery consisting of three AA or AAA galvanic cells connected in series. The current draw is 1 mA when the LEDs are not on and 2,5 mA when they are on because only one of them is on at any given time.

Download firmware for microcontroller

Author: A. Kirilyuk, Molodogvardeysk, Luhansk region, Ukraine

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