Indicator of Polarity
This it is a very simple circuit as much to realize as to use, in the same if the entrance tension is positive it will ignite LED 1 and if she is negative ignites LED 2. Leds can be of different color in order to avoid confusions and to have one better interpretation of the circuit. The power supply will have to be a symmetrical source and by means of the potentiometer we will be able to regulate the point in which, when lacking the entrance tension, both leds remains dull.
| List of components | |||
| Resistance: | Capacitores: | Semiconductors | Several |
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- R1 - 10 K ohms - R2 - 100 K ohms - R3 - 680 ohms - R4 - 68 ohms - P1 - Potentiometer 10 K ohms |
- IC1 - 741 - L1, L2 - Leds common |
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