Help needed please!

[RichyG]

I have planned to do a circuit for a project at college which acts as a timer,

The circuit I wish to make has 6 LED's which light up sequintially after 10 seconds for each LED, when all 6 LED's have been activated I wish for them to reset and light 1 of a further 5 LED's which count minutes. (up to 5 minutes obviously) my tutors are terrible and are seriously no help whatsoever. any help on the matter would be really appreciated, I dont expect a full runthrew of how to complete this project but I definatly need some guidance. I will probably fit a piezo sounder after the 5 minutes are counted.

Sorry if this is quite vague I will elaborate if people have no idea what I am talking about!

Thanks alot,
Richard Golten.

 

[tunedwolf]

are you planning on using a microcontroller ? or a discreet logic design ?

 

[RichyG]

Discreet logic design chum, whats your feedback?

 

[tunedwolf]

I was thinking along the lines of a crystal oscillator feeding a couple of 4060's to give you a tick tock...and a few ripple counters to give you the required steps for the LED's.

Remember though that when counting using LED's, the sixth LED denoting the seconds, will only be lit for a 1sec period before the roll over...

For extra flashiness, you could add a few diodes, resistors and a couple of transistors built as a multivibrator that gets triggered by the count going past 5 mins, set the resistors to vary the frequency of the multivibrator using a couple of the ripple stages and feed it to a small speaker through a capacitor...then it plays a wee tune of sorts when it's done it's 5 mins

just a thought

I'll leave the ingenuity of how to construct it all, in your hands, as it's your college work and not mine