This amplified speaker is from a Radio Electronics from September 1988. The power integrated circuit is from that time and the other components are still common today.
This incandescent bulb stroboscope was found in the February 1974 issue of Radio Electronics...
We found this circuit in Mullard's 1960s transistor manual. The circuit oscillates at 800 Hz, the...
This amplifier uses an integrated circuit from the 70s, which is no longer common on the market. The...