Micro Lover
Member level 2
hi
i m making digital clock using 89c51, in this clock the series of LED work on 9 volt, so i used lm324 to amplify the voltage with 5 volt signal, this output is stable across direct-ground, but the second end i used A683 (PNP) transistor, for ground (-) normal its show 9 volt across 10-volt direct power supply source, but when the LEDs glows, the ground (-) become non-stable so the voltage become almost 6 volt, so how can i stable this output
i m making digital clock using 89c51, in this clock the series of LED work on 9 volt, so i used lm324 to amplify the voltage with 5 volt signal, this output is stable across direct-ground, but the second end i used A683 (PNP) transistor, for ground (-) normal its show 9 volt across 10-volt direct power supply source, but when the LEDs glows, the ground (-) become non-stable so the voltage become almost 6 volt, so how can i stable this output