Infrared modulated transmitter (CB7247E)

This simple Philips circuit from the 1960s can use any general-purpose transistor. The signal is modulated at 2.7 kHz.

Level Changer (CB6646E)
This circuit found in a 1964 US publication reverses the signal level by providing 9 to 0 V...
Transient free divider by 8 (CB6825E)
This circuit is from 1967 General Electric documentation. It uses SUS which are not very common...
XMC1400 Series of Industrial MCUs
August 2017 - MCUs of the new Infineon MC1400 series for industrial use can now be purchased from...