We found this circuit in the Linear Applications Handbook of the 1994 National Semiconductor. The transistor must be a high voltage type and the LM3900 power supply must be symmetrical.
This circuit consists of a control panel for motorcycles and cars monitoring various functions such as...
Found in an American 80's documentation, this circuit can use common FETs like the BF245 and cover...
The integrated circuit used in this project is an old voltage comparator, since the configuration was...