Continue to Site

Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Good comparator IC for LDR light sensor circuit?

Status
Not open for further replies.

hoghunter

Member
I will be using this circuit for the light sensor portion of several projects. What IC would you recommended for this application.
Power supply will be 7.4v, 9v & 12v for various applications. Thanks.

upload_2017-8-15_18-54-49.png
 
I'd think any op amp would do. Without any feedback though I'd expect it to repeatedly switch when sat at the threshold.

I think VCC/Ground/Output area bit swapped around
 
hi hh,
The LM393 requires hysteresis, else the output could oscillate close to the switch over from day/nite.
Also how do you plan to set the lite/dark switch over for different environments/LDR's
The LM393 output is open collector, you need a pull up resistor to +v.
Add some decoupling caps across the power rails.

Wasting power with two 1k's across the supply, 10k's would be better.
I agree with 'ff',tidy up the polarity layout of the circuit
E
 
Status
Not open for further replies.

Latest threads

New Articles From Microcontroller Tips

Back
Top