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  • a mistake .set the Bc550.everything works

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    • hi friend
      hello
      original pcb also 2N3906 emitter 470R connected. schema bc850 emitter connected to the gnd line. Which is true.
      Click image for larger version

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      • Where is the 470r to original pcb?I thing schematic is true Emitter connected to the gnd line directly.

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        • hi friend
          hello
          original pcb also 2N3906 emitter 470R connected. schema bc850 emitter connected to the gnd line. Which is true.
          LP-5 schema wronk.jpgLP-5..jpg

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          • You'll see a good review of pcb. roshik

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            • According to the original pc ne555 7pin 2N3906 emitere (E) connected. According to the scheme, the emitter is connected to the gnd over 100k. which one can help you right. Click image for larger version

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              • Originally posted by kadir6141 View Post
                According to the original pc ne555 7pin 2N3906 emitere (E) connected. According to the scheme, the emitter is connected to the gnd over 100k. which one can help you right. [ATTACH]45925[/ATTACH] [ATTACH]45923[/ATTACH] [ATTACH]45924[/ATTACH]
                To pc E_B_C OF2N3906 is wrong.C_B_E is true.

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                • Mee60 , great work to figure out this project, you are very dedicated .

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                  • The device works surprisingly good (air tests). I made it 1 year ago and was impressed. The scale meter didn't work for me.
                    I used other circuit - not Mee60's but he did amazing job on recognizing the chips.

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                    • Originally posted by eclipse View Post
                      The device works surprisingly good (air tests). I made it 1 year ago and was impressed. The scale meter didn't work for me.
                      I used other circuit - not Mee60's but he did amazing job on recognizing the chips.

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                      • Hi eclipse,

                        what layout and digram you speak about, can you post something?

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                        • If you scroll back just 2 pages back you'll find my post. It's based on the original boards layout.

                          https://www.geotech1.com/forums/show...304#post241304

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                          • Hi
                            I need part list
                            Please help me

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                            • hello can i help you need circuit of this device [email protected]

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                              • Click image for larger version

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