This high-sensitivity circuit was found in a 1980s documentation. The source can be a 9 V battery with a splitter to make it symmetrical. The shock can be 200 uH or more.
Found in old Philips documentation, this circuit uses components from the 60's. | Clique na imagem...
This physical line servo control uses components that are not currently common. The circuit is from...
This conventional power supply circuit with the LM317 was found in a 1987 publication and its...