| Once again, the battery of the battery operated tube headphone amplifier was empty because Elektor author James Glyn forgot to switch it off...
All items tagged with Amplifier and Timer (3)
| Having built a battery-powered valve headphone amplifier, I discovered that the battery was often fully drained due to forgetting to switch...
| The celebrated ‘555’ IC was originally developed as a timer device, but over the years this golden oldie has been used in all sorts of other...