Home     Contact     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS     Terms of services     Privacy policy  
 Home      Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science   

<< Back to INDEX

Auto-ranging Analog Voltmeter for a variable power supply [Project]
posted June 18 2014 4:24.19 by spic0m

w2aew demonstrates his automatically switching, dual-range analog voltmeter:

"This video describes and demonstrates a fun little circuit that is designed
to create a automatically switching, dual-range analog voltmeter which is intended to be built into a variable power supply.
By using two ranges, it permits accurately setting a low voltage such as 3.3 or 5V, as well as accurately setting a higher voltage like 24V. Setting a low voltage using a high voltage meter is not very precise, hence the reason I put this together.
The circuit is demonstrated, and the schematic is reviewed to describe the operation.

Of course, there are many ways this can be done - this is just one example.
It uses one of my favorite little analog ICs, the LM10 op amp and reference. The LM10 (designed by the legendary Bob Widlar) is used as a voltage reference and comparator with hysteresis.
A zener diode is used as a shunt regulator as an indicator LED to show when the meter is in the high range, and a 2N7000 enhancement mode n-channel MOSFET is used to change the resistors associated with the analog meter."

[Link: w2aew]

You might also like...

Arduino based Temperature and Humidity/Humidex meter with DHT22 sensor and color LCD [Project]

3D Jello printer [Project]

Make your own Contactless RPM Meter [Project]

DIY Small and Silent Air Compressor on the Cheap

7 Physics experiments that you can do in your kitchen [Physics]

The annoying thing [Project]

Nice video explains how to chose the proper band saw blade

Simple - Basic RF transmitter - receiver Circuit [Project]

<< Back to INDEX



  Email (shall not be published)


Notify me of new posts via email

Write your comments below:
BEFORE you post a comment:You are welcome to comment for corrections and suggestions on this page. But if you have questions please use the forum instead to post it. Thank you.


No comment yet...

Be the first to comment on this page!

 Contact     Forum     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS   

Site design: Giorgos Lazaridis
© Copyright 2008
Please read the Terms of services and the Privacy policy