449 easy transistor projects49 easy transistor projectsde Robert Michael BrownMateriasAmateurs' manualsElectronicsTransistor circuitsEdiciones (1)49 easy transistor projects (1968)H. W. Sams · inglésMás obras de Robert Michael Brown1101 easy audio projects101 easy audio projects449 easy transistor projects49 easy transistor projects104 easy transistor projects you can build