Tag Archives: BD140

Inverter Circuit For Soldering Iron

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Here is a simple but inexpensive inverter for using a small soldering iron (25W, 35W, etc) In the absence of mains supply. It uses eight transistors and a few resistors and capacitors. Transistors Q1 and Q2 (each BC547) form an astable multivibrator that produces 50Hz signal. The complementary outputs from… Read more »

The main amplifier 50 watt OCL by LF351-2N3055-MJ2955 with PCB

Schematic Diagrams      Comments Off on The main amplifier 50 watt OCL by LF351-2N3055-MJ2955 with PCB

This main amplifier 50 watt OCL circuit has high quality and economical. Because it is designed simple, It can be easily created in your friends, An electronics rookie. And cheap when compared to other speakers, the as same volume level. The main power amp. This circuit is designed in such… Read more »

The main amplifier 50 watt OCL by LF351-2N3055-MJ2955 with PCB

Schematic Diagrams      Comments Off on The main amplifier 50 watt OCL by LF351-2N3055-MJ2955 with PCB

This main amplifier 50 watt OCL circuit has high quality and economical. Because it is designed simple, It can be easily created in your friends, An electronics rookie. And cheap when compared to other speakers, the as same volume level. The main power amp. This circuit is designed in such… Read more »

The main amplifier 50 watt OCL by LF351-2N3055-MJ2955 with PCB

Schematic Diagrams      Comments Off on The main amplifier 50 watt OCL by LF351-2N3055-MJ2955 with PCB

This main amplifier 50 watt OCL circuit has high quality and economical. Because it is designed simple, It can be easily created in your friends, An electronics rookie. And cheap when compared to other speakers, the as same volume level. The main power amp. This circuit is designed in such… Read more »

The main amplifier 50 watt OCL by LF351-2N3055-MJ2955 with PCB

Schematic Diagrams      Comments Off on The main amplifier 50 watt OCL by LF351-2N3055-MJ2955 with PCB

This main amplifier 50 watt OCL circuit has high quality and economical. Because it is designed simple, It can be easily created in your friends, An electronics rookie. And cheap when compared to other speakers, the as same volume level. The main power amp. This circuit is designed in such… Read more »