Showing posts with label clock. Show all posts
Showing posts with label clock. Show all posts
Friday, October 24, 2014
Alarm Digital Clock
The circuit diagram on behalf of the digital watch. 2x16 LCD is connected to the docks 2 of AT89C51. P1.0 of uC force provide the SCL (entertainment in installments clock) and P1.1 SDA (serial data) for I2C message.
Nearby are four switches connected to the uC, having the status of given away within the think. Function of the keys are same as unmistakable from their names.
at what time the power supply is switched on it willpower confer you the default appointment and schedule, but anon you can convert it to the desired appraise. taking into account setting as soon as, the backup battery will keep the timepiece ticking even after the power is not near.
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| Alarm Digital Clock Schematic |
A trivial a propos I2C:
There are basically four most important conditions wearing I2C protocol.
1) Start Condition
2)block Condition
3)Data Validity
4)Acknowledgement
1)Start Condition:
while SCL is sharp and SDA H->L, force take place taken since start condition meant for the exchange of ideas.
2)Stop Condition:
once SCL is high and SDA L->H, will generate a stop condition.
3)Data Validity:
after SCL is high at hand must be refusal chande voguish SDA line lone followed by the data is legally binding, the data loose change be supposed to be there made only as SCL is low.
4)Acknowledgement:
taking into account transfer of lone byte of data the reciever has to acknowledge the sender pro the winning reception. for this the sender add up to the SDA line soaring and reciever pulls down the SDA low, which tells the sender so as to data has reached safely.
Saturday, September 6, 2014
Digital Clock
This is digital clock schematic diagram. This schema is quite complex and quite difficult for a newbie because this schema uses IC with some a complicated connections. The voltages that supplied to the schema are divided in two lines.
The voltage +5VA supplies all IC except the IC9 until IC13 and is supplied with voltage in case of break of network voltage. On the other side, the voltage linr of +5VB only supplies the IC9 until IC13 and display and is interrupted in case of interruption of network voltage, it is to ensure the economy of battery.
You can find the complete explanation include the component part list on the original page.
Tuesday, August 19, 2014
VFD Talking Alarm Clock
Are you having a hard time waking your hubby from sleeping? And when you leave the house for work, are you in doubt that he has not gotten out of bed? One thing that will stop your worries is to use this clock that does not just tell time but also “swears”.
This is an All-in-one alarm clock. It shows an alphanumeric character, it has a calendar, temperature, and a light sensor to control its brightness. You can plug it on to your power source or use a battery. Although this is cool, It’s not ok being around kids. We don’t want young kids to learn to swear or say bad things, right?
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