Decade Counter Circuit | Electronic Project Circuits

Posts Tagged ‘decade counter circuit’

Random number with led 1 digit

This is a circuit diagram showing the random nature of LED 7 segment. In the diagram circuit IC1 – LM555, R1, R2 and C2 on the circuit a sensitive multi-Stable Brett Foster (Astable. multivibrator circuit) function generator signal square (Square Wave) and send the pin 3 of IC1. It can change the frequency by VR1. and often to the leg 14 of IC2, it acts as a circuit of dozens, the output of IC2- SN7490 sent to the input pin of the IC3 – SN7447. The IC3 serves to decode (code BCD) to drive the 7-Segment a common anode, in order to display the numbers 0 through 9.
Work will take place, when a circuit switch S1 Stable multi-sensitive Brett Foster (Astable multivibrator circuit) rectangular waveform generator (Square Wave) resulted in a 7-Segment Display is a number 0-9. By are ordered from 0 to 9, starting at 0 new, which will render this indefinitely. The speed display is based on the frequency of Astable. multivibrator circuit. At the same time that capacitor C1 will be fully, when the switch S1 to C1 will be discharged out completely, to stop the display immediately. Leave fingerprints on the switch S1, to the 7-Segment Display is a little out 0-9.

Be the first to comment - What do you think? Posted by admin - January 7, 2011 at 9:52 am

Categories: Digital Tags: 7 segment LED counter, decade counter circuit, random number

4511 Binary to Decimal decoder

This isn’t a very useful or interesting circuit but it demonstrates the prinicple of a Binary to Decimal decoder IC such as the IC 4511.

Read More Source: http://www.geocities.com/electronics3456/4511.html
Thank you.

Be the first to comment - What do you think? Posted by admin - April 27, 2008 at 8:22 am

Categories: Digital Tags: 7 segment LED counter, cd4511, decade counter circuit, digital counter

Digital Step-Km Counter with IC 4026,4024

Max. range: 9,950 meters with two digits
Slip it in pants’ pocket for walking and jogging

This circuit measures the distance covered during a walk. Hardware is located in a small box slipped in pants’ pocket and the display is conceived in the following manner: the leftmost display D2 (the most significant digit) shows 0 to 9 Km. and its dot is always on to separate Km. from hm. The rightmost display D1 (the least significant digit) shows hundreds meters and its dot illuminates after every 50 meters of walking. A beeper (excludable), signals each count unit, occurring every two steps.
A normal step was calculated to span around 78 centimeters, thus the LED signaling 50 meters illuminates after 64 steps (or 32 operations of the mercury switch), the display indicates 100 meters after 128 steps and so on. For low battery consumption the display illuminates only on request, pushing on P2. Accidental reset of the counters is avoided because to reset the circuit both pushbuttons must be operated together.
Obviously, this is not a precision meter, but its approximation degree was found good for this kind of device. In any case, the most critical thing to do is the correct placement of the mercury switch inside of the box and the setting of its sloping degree.

Parts:
R1,R3____22K 1/4W Resistor
R2________2M2 1/4W Resistor
R4________1M 1/4W Resistor
R5,R7,R8__4K7 1/4W Resistor
R6_______47R 1/4W Resistor
R9________1K 1/4W Resistor
C1_______47nF 63V Polyester Capacitor
C2______100nF 63V Polyester Capacitor
C3_______10nF 63V Polyester Capacitor
C4_______10µF 25V Electrolytic Capacitor
D1_______Common-cathode 7-segment LED mini-display (Hundreds meters)
D2_______Common-cathode 7-segment LED mini-display (Kilometers)
IC1______4093 Quad 2 input Schmitt NAND Gate IC
IC2______4024 7 stage ripple counter IC
IC3,IC4__4026 Decade counter with decoded 7-segment display outputs IC
Q1,Q2___BC327 45V 800mA PNP Transistors
P1_______SPST Pushbutton (Reset)
P2_______SPST Pushbutton (Display)
SW1______SPST Mercury Switch, called also Tilt Switch
SW2______SPST Slider Switch (Sound on-off)
SW3______SPST Slider Switch (Power on-off)
BZ_______Piezo sounder
B1_______3V Battery (2 AA 1.5V Cells in series)