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"Talking alphabet" to Arduino

Among sold in online stores “speaking alphabets "a lot of defective. Most often, the inscriptions on the buttons do not match their letters reproduced. This leads to incorrect teaching children the alphabet. I want to introduce readers to the attention of their development - “speaking Russian alphabet” for on the basis of children… Continue Reading

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Voltage stabilizer for laboratory power supply

Proposed a simple stabilizer with adjustable within wide limits output voltage and current protection can be used as a single channel, and in the multi-channel laboratory power supplies. The output voltage can be controlled by the stabilizer 3 to 27 AT, The highest load current -… Continue Reading

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Use self-renewing fuses for the modernization of the power cord

When connecting various devices to a high-current voltage sources, eg the car battery, possible fatal damage to the load due to malfunction or human error, For example, with reverse polarity power supply voltage polarity. To reduce the possibility of similar troubles, It can be equipped with power cord, with the help of… Continue Reading