In this video, analog water level indicator is designed using a summing amplifier.

In an embedded system, different peripherals are interfaced to uController. Some times controller don't need these peripherals and we want that peripheral to be shut down to save the Power. In this video, we will see How to select a MOSFET for a 3.3v powered circuit. A 3.3v powered uController will use this MOSFET for switching ON and OFF the peripherals like any WiFi module. 5 different MOSETs are checked: 1) 2N7000-D Small Signal MOSFET__200 mA, 60 Volts 2) IRF510 Power MOSFET 3) BS170-D Small Signal MOSFET__500 mA, 60 Volts 4) BSS138-D N-Channel Logic Level Enhancement 5) Si2302DS N-Channel 1.25-W, 2.5-V MOSFET you will get all these MOSFET at following site: https://www.electronicscomp.com/si2302-n-channel-logic-level-mosfet-smd-sot-23-package?search=Si2302 For more details please visit the blog: https://mosfetselection.blogspot.com/2020/05/choosing-switching-mosfet-for-33v.html

In this video, a dual turbine windmill is built using some household material and some electronic components. A NiMH and Li-Po batteries are charged using this windmill.