This circuit is from a 70s documentation. The maximum sampling rate is 800 Hz. The operational amplifier is a common type at the time.
This circuit is from a Linear Technology integrated circuit manual from the 1990s. The circuit...
The IC used in this project is not common these days, but if you have one you can build a high...
With this circuit, it is possible to excite a white LED or another type of high brightness with...