This TTL circuit was found in an American documentation from the 80s. The components are common in the series and the supply must be made with a voltage of 5 V.
This digital clock has a traditional configuration with well-known CMOS integrated circuits. The...
Operational amplifiers used in this 80's circuit is not very common today, but the setting can be...
This 3-digit thermometer, suggested by Texas Instruments, uses 3 integrated plus the display, with...