An LED has two prospects: the anode (constructive) and also the cathode (detrimental). It is crucial to connect the LED the best way close to inside a circuit—LEDs are polarized factors, and reversing the polarity will prevent them from Doing work. de Asistencia Asequible, ley aprobada en 2010 para reformar https://www.uk-exhibitionstands.co.uk/price-vs-performance-decoding-the-exhibition-stall-cost-conundrum/