hey everyone !
on his site lmnc said there was two types of transistors wich i don’t have ! does any body knows what types are okay to do that ?
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In both the stripboard layout and the PCB, both transistors are BC558. I’m assuming you don’t have these.
I think (though may be wrong) that the 2N3906, BC556, BC557, BC559, and 2N4403 are all suitable substitutes. Make sure that you check the pinouts though, as some transistors are different. You might find that you need to flip the transistor round on the PCB or stripboard layout to suit the new pinout.
A single BC558 will set you back $0.04 from Tayda if you can’t find a suitable substitute.
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I built mine with 2N3906s and it works fine. You just have to rotate them 180° vs the BC558s.
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can confirm the 2N3906s work great. same with yellow LEDs if you’re like me and happened to order every color except green 
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