Hourly circuit

[gfts]

Newbieee - Hourly circuit

Dear Friends,

I am no electrical person. Just out of curiosity, i want to design a circuit for an alarm clock.

A day has 24 hrs, but i want the alarm to ring only 16 hrs. For the rest 8 hrs, i would want it to remain silent. Here is a simple qbasic program i wrote for myself but don't know how to implement it, and with what ic's. For you guys, it might be a very simple design

do
for i=1 to 24
if i > 16, alarm=0 else alarm=1
next i
loop

I would appreciate if you can help me. Thanks

 

[Grossel]

What you just did, was writing some general pseudo code.
Where is the wait routine?

What about just using a regular timer. Some of those should do the job.

 

[blueroomelectronics]

+1 what Grossel said, just buy a cheap wall AC timer.

 

[Reloadron]

Dear Friends,

I am no electrical person. Just out of curiosity, i want to design a circuit for an alarm clock.

A day has 24 hrs, but i want the alarm to ring only 16 hrs. For the rest 8 hrs, i would want it to remain silent. Here is a simple qbasic program i wrote for myself but don't know how to implement it, and with what ic's. For you guys, it might be a very simple design

do
for i=1 to 24
if i > 16, alarm=0 else alarm=1
next i
loop

I would appreciate if you can help me. Thanks

Before I forget you may want to give this a read. The link hits on timing functions using QBasic.

You really aren't providing much information as to your goal(s). For example turning an output of a device on for 16 hours and off for 8 hours is one thing. However, turning on that same device on at 8 am and off at 12am is another story. In the latter we are tying the start / stop times to actual time of day. The latter becomes more complicated.

<EDIT> Grossel and Blueroom beat me to it. </EDIT>

Yes, a simple store bought timer is a simple solution.

Ron

 

[gfts]

it doesnot have a clock integrated in it.
What i meant was, when the device receives a signal, probably 3volts, it goes high for 16 times, and goes low for the rest 8 times.
I need someone to help me design a circuit.

 

[blueroomelectronics]

Where's the signal come from? What's the device for?

 

[gfts]

I have an alarm clock with me, but it keeps ringing alarm every hour.
I was just thinking, i'd put a circuit inbetween so that i can stop the alarm for those lazy 8 hrs

 

[blueroomelectronics]

Get a new alarm clock. You still haven't said what the 3V signal is.

 

[gfts]

duh! i'll just slide this circuit inbetween those alarm speakers. the clock works on 3v

 

[blueroomelectronics]

What circuit is that?

What's the QBasic program all about? What does it have to do with a circuit?

 

[Grossel]

duh! i'll just slide this circuit inbetween those alarm speakers. the clock works on 3v

Duh, - Frankly speaking. Just get a new clock. They're cheap those days.