DIY KIT 68- A digital dice using 74LS47, 74LS90 and seven segment display

This is a different type of digital dice. We have previously seen electronic dice with 7 LEDs. In this project, we have a seven-segment display, not LEDs.

When you press the tactile switch the numbers increase from 0 to 9, and when the switch is released it stops at a random number. Using the 2 jumpers, you can display the numbers from 0 to any number, for example, from 0 to 1 or 0 to 5 or 0 to 8 or 0 to 9. (more…)

DIY KIT 67- How to build Jaycar’s electronic dice DIY kit

This is yet another electronic dice project from Jaycar. When you press the RED button on the PCB, all 7 LEDs flash for a while and the LEDs that stay on will represent numbers between 1 and 6. This is a basic learning kit for electronic beginners. Basic soldering skill is enough to build the kit.

This kit is similar to an electronic dice kit from eBay. Check it out. 

Watch the video below to see all the assembly steps:

The video published below is documentation of good images. The images will help you assemble the kit easily.

You can see all the images below. All the images can be viewed on Flickr.

Download Jaycar’s Short Circuits Volume 1, 2 and 3:

Volume 1: https://www.buildcircuit.com/wp-content/uploads/2020/11/Short-Circuits-Volume-1.pdf

Volume 2: https://www.buildcircuit.com/wp-content/uploads/2020/11/Short-Circuits-Volume-2.pdf

Volume 3: https://www.buildcircuit.com/wp-content/uploads/2020/11/Short-Circuits-Volume-3.pdf

DIY KIT 66- Basic electronic dice with 7 LEDs

This is yet another CD4017 and NE555 based digital dice with 7 LEDs. When you press the tactile switch, the LEDs start flashing and stop with a pattern that represents a number between 1 to 6 like real dice. The display will always random.

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DIY KIT 65- NE555 based sound generator DIY kit with a photoresistor

This is yet another NE555 based DIY kit for electronics beginners. A long time ago, I had published this project on this page: https://www.buildcircuit.com/sound-generator/

The electronic kit presented in this article is exactly the same circuit that I had published previously.

The circuit is an astable mode timer. The output frequency of the NE555 varies with the change in resistance of the photoresistor. When you block the light falling on the photoresistor, its resistance drops and that contributes to the change in frequency of NE555. (more…)

DIY KIT 64- ClockIt digital clock DIY kit using Arduino

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This is a great kit to learn the basics of soldering. The Sparkfun ClockIt is a basic alarm clock with buzzer based on the ever-popular ATMega328. If you’re just learning how to solder, this kit should take you 15-20 minutes. If you’re a weathered pro at soldering, this is a great relaxing build that should take 5-10 minutes. (more…)

How to assemble Amarino Evaluation Shield

SEE ALL THE PHOTOS ON FLICKR This post shows you how to build the Amarino evaluation shield.

When you buy the shield package, you will get the following components.

Fully assembled kit is now available on buildcircuit.net.

The PCB:

PCB clearly shows the pin and component names, so, it should help you to get idea of connections of components to Arduino. If you just follow the names of components on the PCB, it is possible to assemble the whole kit without reading the rest of this post. However, I have shown all the important steps.

Step 1: Always start with the smallest component. So, start with resistors. Fix resistors 220R.

Step 2: Then fix 10k resistor.

Step 3: Then, fix LDR and 5mm white LED.

Step 4: Fix tactile switch

Step 5: Fix LM35.

Step 6: Fix RGB LED. It is common cathode type RGB LED.

Step 7: Solder all the female headers.

Step 8: Solder 10k variable resistor and 1 position DIP switch,

Step 9: Fix 16×2 LCD. While soldering the header the 16×2 LCD, the longer part of header should be on the upper side of PCB. Please see the picture below:

When you purchase the kit, you may get a slightly different LCD that needs to be fixed in the following way:

Step 10: Solder 4 pcs of male headers on the PCB to stack the shield over the Arduino.

Your shield is ready 🙂 .

Stacking adapter: You can stack either BlueSMiRF mate silver or general Bluetooth adapter over the shield. See the following pictures how they are stacked.

First Experiment: Test if the LCD is working- source code   Download source code  Watch the video to know how to change the contrast level of LCD. Move the 10k variable resistor screw in the clockwise direction to increase the contrast level. After you confirm that the LCD is working, modify the source to test RGB LED, LDR, LM35DZ and 5mm LED. Check the schematic and circuit layout.


Check out all the experiments with Amarino Evaluation shield


try this also

Fully assembled kit is now available on buildcircuit.net. Watch all the videos (Playlist):

try this also

DIY KIT 61- Digital clock DIY kit with thermistor and photoresistor

This is yet another digital clock DIY kit for electronics beginners. I have previously published several posts related to the digital clock. This kit is no different from those kits, it also displays time and the additional functions and temperature display and alarm. It also has a photoresistor which makes it sensitive to ambient light, the clock will automatically be brighter during the day than at night. The display is 0.8 inches big. With a transparent case, components can be well protected and the clock looks stylish. It is a perfect kit for electronic DIY enthusiasts, school training lessons, etc. (more…)

DIY KIT 60- Digital clock kit-II

This digital clock kit looks very much similar to this kit, the kit is actually slightly advanced than the previous kit. It has enough functionalities like any other regular clock. It is very accurate. It is an easy to build kit and perfect to start to develop your soldering skills. It uses the chip AT89C2051. (more…)

DIY KIT 57- LM317 adjustable power supply with seven segment display

This is yet another post related to LM317.  The LM317 device is an adjustable three-terminal positive-voltage regulator capable of supplying more than 1.5 A over an output-voltage range of 1.25 V to 37 V. It requires only two external resistors to set the output voltage. The device features a typical line regulation of 0.01% and typical load regulation of 0.1%. It includes current limiting, thermal overload protection, and safe operating area protection. Overload protection remains functional even if the ADJUST terminal is disconnected. (more…)

DIY KIT 55- TDA2282 based audio amplifier DIY kit

This is yet another audio amplifier project. It is based on TDA2282 chip. The TDA2822M is a monolithic integrated circuit in 8 lead Minidip package. It is intended for use as dual audio power amplifier in portable cassette players and radios. Datasheet of TDA2282

You can see all the assembly images below. You can see the images on Flickr also. 

 

DIY KIT 53- Frequency counter DIY electronic kit

The description has been copied from manufacturer’s website.

This is a PIC microcontroller-based frequency meter, subtraction frequency is set with crystal measurement functions and programmable, five digital display, easy and intuitive, all using in-line components, the circuit is simple and easy to make.

Measurable frequency range: 1 Hz -50 MHz;
Most commonly used to measure the oscillation frequency of the crystal;
Five Accuracy Resolution (eg 0.0050 kHz, 4.5765 MHz, 11.059 MHz);

Automatic range switching, without artificial switching.
Modified programmable frequency settings for the measurement of radio transceivers and other equipment;
Selectable power-saving mode within 15 seconds if there is no significant change in the frequency automatically turn off the display;
You can use a common USB interface as a power supply, can also use an external power supply or 9V battery. (more…)

DIY KIT 52- LM386 based audio amplifier

I have written several projects related to LM386 based audio amplifier. LM386 is a versatile and a widely popular audio amplifier chip. The LM386M-1 and LM386MX-1 are power amplifiers
designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200. The inputs are ground referenced while the output automatically biases to one-half the supply voltage. The quiescent power drain is only 24 mW when operating from a 6-V supply, making the LM386M-1 and LM386MX-1 ideal for battery operation. (more…)

DIY KIT 51- LM358 based heat and light sensor

This is yet another project based on LM358.  The LM158 series consists of two independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. (more…)

DIY KIT 50- LM358 breathing LED circuit

This is a basic electronic kit based on LM358.  The LM158 series consists of two independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. (more…)

DIY KIT 49- Dark sensor

This is yet another dark sensor DIY kit. It is slightly different from other dark sensor kits. It has a buzzer and a photodiode that makes it different from other kits. Along with the LED, the kit turns on the buzzer whenever it senses darkness.

See all the images below to get the idea for assembly. You can see all the images on Flickr also.

This is yet another dark sensor circuit

One more dark sensor project

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