150pcs BC547+BC557 Each 75pcs BC547B BC557B NPN PNP Transistor TO-92 Power Triode Transistor Kit Bag | Alexnld.com
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.jpg "Turn On an LED During Day and Turn Off in Night Using LDR and BC547 « Funny Electronics")
Turn On an LED During Day and Turn Off in Night Using LDR and BC547 « Funny Electronics
LED Constant Current Circuit
Unusual LED Flasher – Mohan's electronics blog
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LED Constant Current Circuit
