Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

digital input circuit for 24V ac and dc

Status
Not open for further replies.
S

seyyah

Advanced Member level 2
Joined
Oct 7, 2001
Messages
646
Helped
8
Reputation
16
Reaction score
8
Trophy points
1,298
Activity points
6,233
i need a circuit suggestion that can detect ac and dc 24V input and produces a dc output. Can you suggest me anything? No optocoupler will be used.
 

You will also probably need a capacitor and discharge resistor. A single diode will suffice. If you need to interface to 5V you will also need some form of voltage limiting.

Keith
 

Ok, say i put a diode to the input what will be the peak voltage referenced to the circuit ground? Half of the 24Vac's peak?
 

A 24VAC signal normally means 24V RMS. That means you will get 34V peak so that is the voltage you will see, less a diode volts drop.

Keith
 

    S

    seyyah

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top