Showing posts with label digital. Show all posts
Showing posts with label digital. Show all posts
Friday, April 12, 2013
Build a Digital Stopwatch 0 60sec
Now Build a Digital Stopwatch 0-60sec By using the same circuit of the Digital Stopwatch 0-99sec , we can add an AND gate, and transform the 0 – 99sec stopwatch to a 0 – 60sec stopwatch.We must find a way to control the RESET function of the BCD counter, which is responsible for the counting of the seconds. As we studied above, the circuit resets when we have 99 to 100, that is 1001 1001 à 0001 0000 0000. To make a transformation successfully we must force the pulse from 59 to 60 0011 1001 à 0100 0000 on the output of the BCD counter.
By placing the AND gate, with its inputs on the Q1 and Q2 of the BCD counter of the decades, we make sure that when the gate closes, the RST input of the BCD counter will be set to logical “1”, which on its turn, will force the circuit to start over. The transformed circuit appears in picture 2.
Tuesday, April 9, 2013
Digital tone control with MAX5406
The series will I make here is a series regulator of Volume, Bass, and Balance Trable Digital (Tone Control). The core of this circuit is an IC-type output from the Manufacturer Maxim MAX5406, while the IC is an audio processor that comes with the interface switch hit for Tone Control setting above. The circuit scheme is as follows:
The scheme above uses very little supporting components and this makes can be made with a mini size of a matchbox only even if using all SMD components can be reduced in size by half for this time I will only give a simple layout made, following picture:
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| layout components |
Monday, April 8, 2013
3 digits Digital Ammeter using Microcontroller
Digital Ammeter is needed to do any kind of electronics
circuit making. It is very much useful who is interested in electronics
projects. Now-a-days there are many kind of digital or analog ammeter
which are found in the market. But if you make such kind of digital
meter then you have no no bounds happy.
circuit making. It is very much useful who is interested in electronics
projects. Now-a-days there are many kind of digital or analog ammeter
which are found in the market. But if you make such kind of digital
meter then you have no no bounds happy.
The bellow circuit is digital Ammeter based on PIC16F684 and ACS712
current sensor. Here the measured ac/dc current will display on three
digit 7-segment with resolution 100mA. In this project current sensor
is ACS712ELCTR-30A-T . This circuit can measure the ac or dc current up
to 30mA with 66mV/A output sensitivity.
current sensor. Here the measured ac/dc current will display on three
digit 7-segment with resolution 100mA. In this project current sensor
is ACS712ELCTR-30A-T . This circuit can measure the ac or dc current up
to 30mA with 66mV/A output sensitivity.
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