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arduino Switch transistor with a low voltage and current – Circuit Schematic
arduino Switch transistor with a low voltage and current
Designing a circuit that will use a combination of switches and resistors to allow a microcontroller to identify which switch was pressed based on the voltage r...
servo creating a switch using arduinos digital outputs – Circuit Schematic
servo creating a switch using arduinos digital outputs
Charge a simple servo that only has + and - pins. Usually I would connect it`s - pin to the ground and + pin to the digital output from Arduino. This works, but...
communication Multiplex data and LED pin – Circuit Schematic
communication Multiplex data and LED pin
Performing a chip conversion for the Sparkfun LED RingCoder. The sample code provided with the product works well on an Arduino UNO, but it uses a pin for each ...
How should I wire up the circuit to connect a TSOP4838 (Radio Shack 276-64) infrared receiver to an Arduino – Circuit Schematic
How should I wire up the circuit to connect a TSOP4838 (Radio Shack 276-64) infrared receiver to an Arduino
All you need to do is supply a resistor (I used 200 Ohms, with a 3. 3V supply) to the power line, GND it, then connect the data line to one of your digital pins...
led Arduino multiplexing help needed – Circuit Schematic
led Arduino multiplexing help needed
If you want to build a 7 to 128 demux with 3-to-8 and 4-to-16 demuxes, then put the 3 high bits of your output address into the 3-to-8, and use the outputs of t...
arduino How can I display a scoreboard on stage for a play – Circuit Schematic
arduino How can I display a scoreboard on stage for a play
A scoreboard in the middle of the room, that one will control from backstage. The scoreboard will have two 3-digit numbers, controlled individually. Whenever th...
Can an Arduino use a 12 V relay – Circuit Schematic
Can an Arduino use a 12 V relay
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arduino Question about transmitter/reciever – Circuit Schematic
arduino Question about transmitter/reciever
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Arduino IR Transmitter & Receiver w/ LEDs Flickering Issue (Whats wrong with this circuit?) – Circuit Schematic
Arduino IR Transmitter & Receiver w/ LEDs Flickering Issue (Whats wrong with this circuit?)
An Arduino Uno connected to two IR transmitters and respective receivers. Basically, when one of the receivers detects a beam break, I have a strand of LEDs dis...
arduino Wiring an illuminated toggle switch – Circuit Schematic
arduino Wiring an illuminated toggle switch
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microcontroller Arduino 230v Light bulb dimming – Circuit Schematic
microcontroller Arduino 230v Light bulb dimming
Did you check if you actually see the zero crossings on your input pin You might want to write a sketch that toggles the pin13 LED every 50 or 60 or zerocrossin...
ultrasound How do I drive an ultrasonic transducer with an Arduino – Circuit Schematic
ultrasound How do I drive an ultrasonic transducer with an Arduino
A cat deterrent with an Arduino, something akin to this. I have figured out detection, and now realize that I need to use an ultrasonic transducer to produce th...
arduino Electret Microphone preamplification will it work for dynamic type microphone – Circuit Schematic
arduino Electret Microphone preamplification will it work for dynamic type microphone
The circuit is okay (not ideal for quality but it will work), but there`s one small issue if you want to feed the output to your Arduino. As shown, the output w...
Electric strike with Arduino circuitry – Circuit Schematic
Electric strike with Arduino circuitry
A fingerprint door lock, and the only thing that`s stopping me from purchasing the components is knowing if my setup is going to work or not. Is this an accepta...
arduino Circuit with switching MOSFET not working – Circuit Schematic
arduino Circuit with switching MOSFET not working
If I disconnect the ground of the Arduino from the negative terminal of the power supply, current flows through the MOSFET, even when the switch isn`t closed!...
Custom Arduino circuit not working – Circuit Schematic
Custom Arduino circuit not working
A circuit using a keypad, a servo and a few LED`s. This was connected to my Arduino Uno. Now I tried putting everything onto a single PCB and thus building my o...
arduino Selecting the right relay – Circuit Schematic
arduino Selecting the right relay
A 5v power supply to act just like a switch. I will be controlling it with an Arduino like described here: You won`t be able to drive it directly from the Ardui...
audio Using a microphone with an Arduino – Circuit Schematic
audio Using a microphone with an Arduino
This requires expensive hardware (microphone & amplifier) and some sophisticated audio analyizig on the microcontroller. Even a complete microphone with amplyfi...
breadboard How does current flow through this Arduino circuit – Circuit Schematic
breadboard How does current flow through this Arduino circuit
It seems to me like the wire connected to the 5v pin is connected to the + pins of the breadboard. which are connected to nothing. There`s nothing else on the +...
arduino How to make a clean amplified microphone analog to digital conversion – Circuit Schematic
arduino How to make a clean amplified microphone analog to digital conversion
Hooked up an electret mic into an opamp and gave output to my arduino microcontroller. The ADC on the microcontroller converts a range of 0 to 5 vV to a 10-bit ...