This circuit can work with almost any JFET. The circuit is from an Electronics Now from April 1993. It is powered by a 12 V battery, but can also be powered by 9 V.
Microchip's EQCO62X20 6.25Gbps Asymmetric Coax Equalizer is a driver/equalizer chipset that forms...
When the sensor, an ordinary photo-transistor, receives light, the relay closes its contacts. The...
This input stage has unit gain but a high input impedance and low output impedance. The circuit is...