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LED Torch Uses Blocking Oscillator(BC337)

2014-12-23 00:33  
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This article briefly describes the LED Torch Uses Blocking Oscillator (BC337). This principle is easy to understand, but also very practical. Depth understanding of circuit elements, can be more effective to grasp this principle. Do you know the circuit, for example, can understand and buy these components: BC337 , 1N4148, BC327.

This simpleLEDtorch is driven by a 2-transistor blocking oscillator which steps up the voltage from a 1.5V cell. It relies on the inherent current limiting of the 150μH choke to protect the whiteLEDfrom over-drive. With a 9V zener diode in place of the whiteLED, it could also provide a 9V supply provided the current drain is modest.

Figure:1 Circuit diagram

Figure 1 Circuit diagram

 

 


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