This low frequency divider uses unijunction transistors. The bipolar transistor can be a BC548 and the zener diode Z4XL can be a 12 V zener. The circuit was found in a 1967 publication.
This circuit uses a common diode as sensor. The output goes from 0 to 10 V with the temperature change in...
This circuit is more elaborate than the previous one. It was obtained from an 80s circuit manual. The...
This interface or shield circuit for instrumentation was obtained in a publication from the 90's....