This circuit was found in a 90's Electronic Design. The circuit can be adapted to use modern components. The power supply is made with 5 V which allows its use as a shield sensor.
Toshibas IC Brushless Motor Drivers Toshiba offers through Mouser Electronics a broad range of...
This circuit was found in an American magazine 73 for radio amateurs of the 80s. It is an...
This sophisticated repellent uses a double 555. We find it in an American documentation from the...