This interesting circuit was found in a Popular Electronics from July 1965. It uses a double tube with a 110 V filament that can be fed directly from the power grid.
Model railway electronic whistle (T511E)
- Details
- Written by: Newton C. Braga
This interesting circuit was found in a Popular Electronics from July 1965. It uses a double tube with a 110 V filament that can be fed directly from the power grid.
