Re: Design of process control timer



Hi venkat,

Try using Cmos Counter CD4020 and a 555 timer as a clock. Hope you
can figure out how to drive the relay from cmos IC.

Thanks and Regards,

Bhaskar.
venkatsr wrote:
I need help on designing a sequential timer to switch on and off
atleast 3 relays in a particular sequence using timer ic.Thank You!

.

Relevant Pages

  • Re: Electric shutter circuit question - ready for timer?
    ... If the timer controls the 120V then the capacitor doesn't get fully charged and the shutter solenoid doesn't get a high voltage kick to slam it closed. ... You need to wire a relay where the switch is located - the coil of the relay goes to the timer and the relay contacts are wired across the switch. ... Indeed, you need that initial higher voltage to "kick" the solenoid, then hold it with a lower voltage. ...
    (rec.photo.darkroom)
  • Re: Thermostat + Timer
    ... I'm doing a hobby project to build a timer that can be used to turn ... a relay at a pre-determined time and then turn it off after a delay. ... but to use a thermostat to control the temperature during this ...
    (sci.electronics.design)
  • Re: Thermostat + Timer
    ... I'm doing a hobby project to build a timer that can be used to turn ... a relay at a pre-determined time and then turn it off after a delay. ... to use a thermostat to control the temperature during this period. ... we are talking about a water heater for domestic ...
    (sci.electronics.design)
  • Re: Thermostat + Timer
    ... I'm doing a hobby project to build a timer that can be used to turn ... a relay at a pre-determined time and then turn it off after a delay. ... to use a thermostat to control the temperature during this period. ...
    (sci.electronics.design)
  • Re: Thermostat + Timer
    ... I'm doing a hobby project to build a timer that can be used to turn on ... I also want to use a temperature sensor to override the relay but only ...
    (sci.electronics.design)