This boost amplifier was found in a Popular Electroniics from the 90s. The circuit operates up to 20 MHz depending on the coils used.
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...