This circuit triggers a relay when the set temperature is reached. The circuit is from an old documentation. The relay may be equivalent according to the transformer secondary voltage.
The circuit shown in Figure 3 is used to control voice coil micromotors, such as those used to...
This circuit used in signaling for boats, cars or barriers was found in a 1980s documentation. It still...
The integrated circuits of the ULN2001 / 2/3/4 series also known as MC1411 / 12/13/14 consist of...