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.

Help with relay drive zero crossing

Status
Not open for further replies.

Nicholas

Member level 4
Joined
Feb 21, 2004
Messages
77
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
711
zero crossing relay

Can I use only one Input pin on MCU to implement zero crossing for relay drive?
I used this pin as mains frequency signal input for now , and do relay drive in a fixed delay time after detecting zero crossing . But cause relay response time varies from one to one , so , a fixed delay time can always work , so , any more good solution ? only one I/O left , no more.
Hope anyone help. thx.
 

Just use triac output driver, like MOC3082 and any suitable triac, for example BT139. You will need just one pin for output - the whole zero-crossing functionality will be provided by MOC.

Ace-X.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top