This converter for WWV time reference station signals was found at Popular Electronics. The 15 MHz signals are now received on a medium wave radio at 1 MHz.
This other photodiode amplifier uses an operational amplifier in the non-inverting mode and in the...
This circuit was found in an English magazine from 1977. The critical component is the gas sensor....
This project makes use of a technology without many digital components and that can be easily...