Digital lighting circuit


Posted on Mar 28, 2007

After the SCM execution, Pl output port to bidirectional input 74LS245 driver chips, the same driver each phase of the digital control, according to the information Pl port out


Digital lighting circuit
Click here to download the full size of the above Circuit.

put in digital form characters, with a digital display to achieve the purpose of the character. Pl 74LS245 input port and is connected to its output terminal connected to the segments directly with digital control. Among them, 19 feet 74LS245 is called enabling control terminal, when the pin is low, 74LS245 only transmit data, so 19 feet and the ground phase. 1 foot is the transmission direction control terminal, when the pin is high, 2 to 9 feet for the input side, 18 ~ 11 feet for the corresponding output; when 1 pin is low, 18 to 11 feet as an input, 2 to 9 feet for the corresponding output. Example 1 of the present circuit pin to low, input and output is used in the latter. Digital tube common cathode terminal connected to earth, this connection is called static.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Phase detector with 10-bit accuracy
Thermocouple-preamplifier
Electric Guitar/Violin Preamplifier
Electromagnetic Field Probe with Meter Outputs
Comparator light sensor
555 Momentary Switch Circuit
The application circuit of TDA7088 FM integrated circuit
Notch Filter



Top