Basic RC circuit
For the circuit to work as light operated musical bell, we need to connect the SW1- switch to N/C terminal of relay. LDR has to be kept in a dark case.
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TSIR04 – 4 Channel Outputs- 4 optically Isolated Inputs USB Relay Module
TSIR04 is a USB relay with optically isolated inputs and OLED display and temperature sensor port. It allows computer control switching of external devices by using the USB port of your computer. The communication medium also can be changed easily. Replace the USBBee module with a WiFiBee, it becomes a WIFI relay. It will be a Bluetooth relay when…
10 LED BAR-GRAPH DISPLAY WITH OP-AMP SHIELD FOR ARDUINO NANO
Arduino Nano Bar-Graph display with universal op-amp shield consists of 10 LEDs and single low voltage general purpose LMV321 op amp including few capacitors and resistors connected to op-amp pins. The op-amp proto area can be configured without any modifications to the board and all that is necessary is to select the correct resistors and…
Arduino Project 11- Temperature and Humidity sensor with DHT-11
In this tutorial, will learn to use our Arduino board to display the temperature and humidity on the 16×2 LCD display using a DHT-11 sensor. For this project, you need to download the DHT11 library. You can download the library from this page. A long time ago, we had published a similar article. Please check…
1.6W MONO AUDIO AMPLIFIER
1.6W Mono Audio Amplifier Project is based on TDA7231, which is class AB power amplifier with a wide range of supply. FEATURES Power supply: 5 To 12 VDC Output: 1.6 W, 4 Ω / 1 W, 8 Ω Low crossover distortion, soft clipping PR1 Preset for Volume Adjust Terminal pins for connecting power supply, input…
NeuroDreamer Sleep Mask
“Use your brainwaves to help you rest, guided by soothing music and fading lights.” – The NeuroDreamer Sleep Mask by Cornfield Electronics is a meditation device that flashes colored lights at your eyelids and plays brainwave beats for your ears to help you fall asleep, have lucid dreams, or for meditation. NeuroDreamer is open source…
Serial LCD do-it-yourself(DIY) kit
This is a simple serial lcd do-it-yourself (DIY) kit based on Arduino. I derived this kit from the open source eagle file available on sparkfun.com. Â The only difference is that I used low cost components to make it more affordable. It uses the libraries and examples published on the quickstart page of sparkfun.
AUDIO VU METER 9 LEDS
5 LED VU Meter kit is based on LB1409 IC from SANYO, which will indicates the volume level of the audio signal it senses SUPPLY 12V DC @ 50mA PR1 REF SET PR2 AUDIO LEVEL SET SCHEMATIC PARTS PCB DOWNLOADS Audio_VU_Meter.pdf
ELECTRONIC TOGGLE SWITCH
The Project works as electronic toggle switch. DESCRIPTION The circuit is based on CMOSÂ CD4013Â Flip Flop IC, The circuit has two stable states, ON and OFF. Once it is ON, it remains ON till you press the switch again. A short button press of a tactile switch SW1 latches the circuit ON and another toggles it…
Preamplifier for electret microphone with LM358 opamp
It’s a simple project to build a stereo preamplifier using electret microphones and the cheap operational amplifier LM358. In the past, we have made few projects comprising LM358, you can check them here. This project uses the dual-channel operational amplifier LM358. Each channel is used to increase the signal of one electret microphone and it…
DIY KIT 18- CH340G USB to TTL Kit
This is basically a module similar to FTDI/FT232RLbasic breakout board. CH340 is a series of USB bus adapters, that provides serial, parallel or IrDA interfaces over the USB bus (note: CH340G supports serial interface only). The CH340G integrate circuit provides common MODEM signals to allow adding a UART to a computer or converting existing UART devices to USB…
DIY KIT 17- DIY ZIF Arduino programmer
It is just another ‘build your own Arduino’ project. BuildCircuit has worked on similar projects before. The most popular project is a DIY Arduino kit. The DIY Arduino looks similar to the real Arduino boards and uses an FTDI basic programmer to program the chips. The kit that we are going to work on this…
2 x 50W Class D Bluetooth Audio Amplifier Board – TSA3118
TSA3118 is a 2x50W audio amplifier board with AudioB plus Bluetooth module. It has perfect class-D architecture (based on TPA3116D2) and each channel has 50W power output. Both channels are capable of outputting nominal power simultaneously and continuously. This board can be powered by any DC 10V-24V power supply. It can be used to drive any 4Ω or 8Ω…
TSA6012 – Bluetooth Audio Receiver Board
This Bluetooth music receiver connects to the Line-In or Aux input on your home audio system. You can then stream audio from your Bluetooth enabled cell phone or mp3 player to your home audio system. It comes with an AudioB plus Bluetooth module. Note：TSA6012 can auto-detect the Aux in/Line in Audio input. Bluetooth Audio source has higher priority….
DIY KIT 63- Multi-Functional Simple Electronic Password Lock Circuit
I found this small kit on Ebay. The kit is pretty easy to assemble. The following video shows the assembly steps. The kit actually turns on the LED when you press switches, 1, 4, 7, and 9. That’s it.
Amarino Evaluation Shield
After the success of BuildCircuit’s first Amarino Shield for Android-Arduino experiments, we are here with Amarino Evaluation Shield. I am grateful to all the customers and readers who purchased our first kit and gave us their wonderful comments. About Amarino Evaluation Shield: Amarino Evaluation Shield is for Amarino toolkit and most of the available Android…
Android- Arduino BTCOMM Shield Circuit Layout Using Fritzing
You can make this shield on breadboard also. The circuit layout is given below: The BlueSMiRF used in the layout is Bluetooth Mate Silver READ ABOUT THIS SHIELD SEE ALL THE PHOTOS OF THIS EXPERIMENT SEE ALL THE PHOTOS OF AMARINO SHIELD V.3.0 OTHER EXPERIMENTS WITH THIS SHIELDÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â CIRCUIT LAYOUT ON BREADBOARD
Cosmarino- A DIY kit for Android-Arduino communication
“Cosmarino is a kit for experimenting Android-Arduino communication via Bluetooth.” Features:Â Control RGB LED with Android phone Display photoresistor sensor data on a graph on Android phone Transmit LM35DZ temperature sensor data on Android phone Control 5V relay with Android phone Control 5V relay and LED with any infrared remote control This is Cosmarino- A…