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A set of indicators for children's technical creativity (No. 4) has been produced since 1991. The set includes: Indicators IN-17 - 4 pcs. Indicators IN-14 - 4 pcs. D226 diodes - 2 pcs. Resistance 160 kOhm - 10 pcs. Chips KM55ID1 - 8pcs. Dot neon bulbs - 2 pcs. Diodes and resistances are required to connect vacuum digital indicators to the 220 V electrical grid. Dot neon indicators are used as a separating point. The kit allows you to collect two options indicators for electronic watches.