Let’s see some toy circuits. These are electronic dice circuits. Which looks like real dice. We use only the press switch being thrown. Although this is the high-tech toys. Such as Game PC, Tablet so expensive. But this projects an enchanting are: To start creating your own. Make family time together creatively. My son is always excited when creating these projects.
How electronic dice using ic 4017 works
For playing that when we turn on the power supply to the circuit. The LED will glow at either portion, from 1-6 LED, as a place of real dice. When we press the switch, all LED(7 LED) will flash jointly, with high-speed up.
But when we release switch, LEDs will stop flash, then either led glow. Maybe since 1-6 LEDs as a form of the dice.
In pressing switch each time, it will not glow in the same position always. It will light at any point with uncertainty. Therefore resembles much throw dice.
The principle of the circuit
Then, will be a normally open pushbutton to connects signal from the first sector to the second sector. By the frequency counter which is used as CD4017 is the counter.
Normally this IC number will be Decade counter with 10 decoded outputs IC.
But in at this, we joint pin 5 and 15 together.
Then, taking output at pin 7 to reset pin 15 as soon as pin 7 has an output in a fraction of a second. It will reset the IC, to move the output to pin 3 that is the first position.
Therefore, the output that we have really just 6 volts only. And every time that we press switch-SW1. Next, IC1 will change the output position to emit.
For in the third sector is a display of this circuit is set as the matrix diode. The matrix diode act as a divider output signal of IC to each place of LEDs from 1 to 6 LEDs.
But why use 7 LEDs, because of the position of the LED dice like that. Especially at 1, 3, 5 pts. If using LED just 6 LED only will cause LED is not the center does not look beautiful, so, so I added another one.
The components List
IC1: CD4017: Decade counter with 10 decoded outputs IC LED1-LED6: LED as you need to see text Q1,Q2: C1815, 45V 100mA NPN Transistor D1-D9: 1N4148, 75V 150mA Diodes C: 10uF 16V, Electrolytic capacitors C: 1uF 16V, Electrolytic capacitors 0.25w 5% Resistors R1: 2K, R2: 10K R3: 100K Others -PCB, 9-volts battery, wires, and others. Etc. Note: See Electronics Components Stores. You may get what great things.
This circuit used PCB copper foil track layout as Figure 2. on actual-size for Solder side. Then, assemble all components to PCB, as Figure 3 the component layout (top view). By small size before the same general projects. Figure 2 Printed circuit board copper foil track layout of this project. (actual-size) Figure 3 The components layout of the PCB. When finished assemble, then check the correctness all again.
Next, so insert IC1 into the socket IC. Then later, you apply the supply voltage to this circuit, will see the LED lit up maybe any LEDs.
Next, press switch, each time, LEDs will grow to switch the place continuously by unique. If try to do, then get results like this, so are correctly to use.
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This is an electronic dice circuit, normally will get the energy from a 9-volt rectangular battery. But can also use supply voltage between +3V to +15V, by still work normally. The resistors all in-circuit use the power size of ¼ Watts. The LED will be used as a green switch red or all red as you like it.
Note: This IC-No. CD4017, many company product sales. Which the letter begins may be different. But has a number- 4017 It can be used as well, such as CD 4017, HEF 4017, MC1 4017, HD 4017, since as the same number.
What is more? I have other ideas. If we have a 7 segment LED display we can get like this. See below!
Digital dice circuit using 7 segment display
This dice digital circuit would be a favorite of everyone, by using it to display the numbers. When you switch to a spin button or it like is tossing a dice. Looks like a random form normally. A heart of this circuit, an astable oscillator 1Khz with IC 555 and RC networks,it will be output to IC2 is Decade counter IC – 4017.
When I turn off the spin switch, it will be converted to a binary input with a diode matrix D1-D9 (1N4148 or number 1N914). And then changed to a 7 segment display with a decoder drive IC No. CD4511 (IC3).
The brightness of the numeric display may be customized by adjusting the value of R3.
Random counter circuit with 7 segment display using basic digital IC
I am going to show you a fun digital learning. Here is a random counter circuit with 7 segment display using basic digital IC.
Even though many people are interested in Arduino. Because we can use it in a variety of ways. But basic digital IC education, It’s interesting as well.
Sometimes we don’t need to use a lot of resources for small jobs. Imagine, how do you mow the lawn in the front yard? Scissors or large tractor.
So what? Basic simple circuit working.
They will show the random nature of the LED 7 segment. You will enjoy this project. It is suitable for digital counter learning.
When we press holding the switch. The numbers change rapidly from 0 to 9 all the time. Until the switch is released. Numbers will stop at either. Such as 5 etc.
It uses three TTL digital ICs as main components:
- SN74LS47: BCD-TO-SEVEN-SEGMENT DECODERS/DRIVERS
- SN74LS90 BCD Counter Circuit
- NE555 timer.
All Parts used in this circuit are easily available in most of the local stores.
If you still do not get ideas. Let’s continue to look at the circuit.
How this circuit works
Look at the circuit above. IC1(NE555), R1, R2, and C2 are an Astable. multivibrator circuit. To generates a Square Wave signal out of pin 3 of IC1.
Related: 2 Coin toss Game circuits diagram
Then, the signal comes to pin 14 of IC2(SN74LS90). It acts as a decade counter circuit.
Next, the output of IC2 sends to the input pin of IC3(SN74LS47). The IC3 serves as a BCD to 7−Segment Decoder/Driver. To drive a 7-Segment LED display in a common anode.
It can display the numbers 0 through 9.
Test the circuit
Working start with. When pressing S1. A stable Astable multivibrator circuit products a rectangular or square Waveform. It results in a 7-Segment LED Display is a number 0 to 9.
We will see it in order from 0 to 9. And starting at 0 new again. In which it will function continuously. The speed of the display depends on the frequency of the multivibrator circuit itself. We can change its frequency by VR1.
At the same time. When pressing S1. The current charge in C1 to full, too.
After that, we released S1. The C1 discharge is current to VR1, R1, R2, C1. It causes the oscillator to run in short. We see the counter runs 7 segment display in short, as well.
Parts you will need
0.25W Resistors, tolerance: 5%
- R1, R2: 3K
- R3: 5K
- R4-R10: 300Ω
VR1: 100K Trimmer Potentiometer
- C2: 0.082µF 50V
- C3: 0.01µF 50V
C1: 47µF 25V
Semiconductors and others
- IC1: NE555, Standard Timer Single 8-Pin Plastic Dip
- IC2: SN74LS90, Decade counter
- IC3: SN74LS47, BCD to 7−Segment Decoder/Driver
- 7-Segment LED, common anode
- S1: Normally OPEN Pushbutton switch
- 5V Power supply
Check out these related circuits, too:
- 2 Digit Simple digital counter circuit using CD4026
- A universal digital counter circuit using CD4510 & CD4543
- Digital dice circuit using 7 segment display
CR: photo by SenMod
Here are a few related circuits you may find helpful, too:
- 2 Digit Simple CD4026 Digital Counter circuit
- LED Chaser circuit using 4017 and 555
- Switched mode power supply schematic using TL497
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