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Components

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Passive Buzzer - PCB Mount 12mm 2.048kHz
$0.50  
2255 pc(s)
This is a small 12mm round passive buzzer that operates around the audible 2kHz range. We drove it directly from a 3v to 5V Arduino or micro:bit to generate simple melody. Note : This passive buzzer requires a square wave (PWM) signal to make a sound or to play melodies. The frequency...
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Passive Piezo Buzzer w/Leads - 30mm
$2.50  
Out-of-stock
This is a small 30mm round passive buzzer that operates around the audible 2kHz range. We drove it directly from a 3v to 5V Arduino or micro:bit to generate simple melody. The buzzer comes with ~80mm leads terminated with male pin. Note : This passive buzzer requires a square wave...
Out-of-stock
Passive Piezo Buzzer w/Leads -13mm
$2.90  
30 pc(s)
This is a small 13mm round passive buzzer that operates around the audible 4kHz range. We drove it directly from a 3v to 5V Arduino or micro:bit to generate simple melody. The buzzer leads are terminated with male pin. Note : This passive buzzer requires a square wave (PWM) signal to...
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Potentiometer 10K with Knob
$1.30  
691 pc(s)
There are lots of potentiometer out there. Some are very large, some so small they require a screwdriver. This 10K potentiometer has a small knob built right in and it's breadboard friendly to boot! Perfect for your next LCD contrast adjuster, opamp setting, or volume level. This model # is...
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Potentiometer Knob
$0.50  
10 pc(s)
This is a great looking rubberized knob for the potentiometer. Slides onto the Single Turn Potentiometer and holds tightly with a strong friction fit.
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Reed Switch - Insulated
$2.95  
10 pc(s)
This is a small device called a  reed switch . When the device is exposed to a magnetic field, the two ferrous materials inside the switch pull together and the switch closes. When the magnetic field is removed, the reeds separate and the switch opens. This makes for a great non-contact...
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Relay SPDT Sealed - 3V
$1.20  
66 pc(s)
These are general purpose, Single Pole - Double Throw (SPDT) sealed relays. Use them to switch high voltage, and/or high current devices. This relay's coil has switch voltage of 3V at 120mA. The contacts are rated 10A at 120VAC, 10A at 30VDC. Features : 3V DC SPDT Relal Fully...
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Resistor 10K Ohm 1/4 Watt PTH (10 pcs)
$0.70  
40 pc(s)
1/6th Watt, +/- 5% tolerance PTH resistors. Commonly used in breadboards and perf boards, these 10K resistors make excellent pull-ups, pull-downs, and current limiters.
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Resistor 1K Ohm 1/4 Watt PTH (10 pcs)
$0.70  
58 pc(s)
1k Ohm, 1/6th Watt, +/- 5% tolerance PTH resistors. Commonly used in breadboards and perf boards.
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Resistor 330 Ohm 1/4 Watt PTH (10 pcs)
$0.70  
117 pc(s)
1/4 Watt, +/- 5% tolerance PTH resistors. Commonly used in breadboards and perf boards, these 330Ohm resistors make excellent LED current limiters and are great for general use.
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Resistor Kit - 1/4W 1% (600 total)
$7.95  
21 pc(s)
Don't you hate it when you're in the middle of a build and you don't have a certain value of resistor? Don't let it happen again with this resistor kit. This kit contains a resistor color code chart and 20 each of 30 standard value 1/4 Watts resistors with 1% tolerance. It's perfect for starting...
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Rotary Encoder
$7.80  
Out-of-stock
This is a 12-step rotary encoder with a nice 'clicking' feel. It's breadboard friendly, and has a pretty handy select switch (by pushing in on the knob). The encoder is different from a potentiometer in that an encoder has full rotation without limits. The unit outputs gray code so that...
Out-of-stock
Slide Pot - Medium (10k Linear Taper)
$3.50  
2 pc(s)
A simple slide potentiometer can go a long way. Rated at 10KOhm and 0.1W. Comes with solder tab connections. The pot has an overall travel of 30mm and has two mounting holes on top. Dimensions: 9.5mm x 45mm Documents: Datasheet (C3031N-1A2-B10K-GP)
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Slide Pot - Small (10k Linear Taper)
$2.50  
3 pc(s)
A simple slide potentiometer can go a long way. Rated at 10KOhm and 0.1W. Comes with solder tab connections. The pot has an overall travel of 20mm and has two mounting holes on top. Dimensions:  9.5mm x 35mm Documents: Datasheet  (C2031N-1A2-B10K-GP)
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Slip Ring - 12 Wire (2A)
$18.95  
3 pc(s)
This is a 12 wire slip ring, a remarkably simple electromechanical assembly that allows electronic signals to be passed through its rotating innards. Commonly, you'd find slip rings in wind turbines, radar antennae, or anything else that requires continuous 360° rotation while maintaining an...
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Slip Ring - 6 Wire (2A)
$18.95  
5 pc(s)
This is a 6 wire slip ring, a remarkably simple electromechanical assembly that allows electronic signals to be passed through its rotating innards. Commonly, you'd find slip rings in wind turbines, radar antennae, or anything else that requires continuous 360° rotation while maintaining an...
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Speaker - PCB Mount
$2.90  
1 pc(s)
This through-hole speaker is great for projects where you need something that sounds better than a piezo buzzer but don't have room for a full-blown speaker. This 30mm diameter speaker is encased in plastic and will handle about 100mW of power. Features: 8 ohm 0.1W (0.2W max)...
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Speaker 8-Ohm 1W
$1.50  
3 pc(s)
If you want to get some sound out of your project but have a tight space budget, this is a good way to do it. This 1W, 8Ohm speaker with plastic diaphragm and metal basket is only 28mm in diameter and just over 4.7mm thick, the same kind you might find in one of those "talking greeting...
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Split Ferrite Cable Core For RFI / EMI Noise Suppression
$1.80  
3 pc(s)
This easy-to-use split ferrite core provides a cost-effective means to reduce the electromagnetic interference from being induced in or radiated from data and power cables. The special designed plastic housing allows the ferrite sleeve to use with a variety of cable diameters from 3 to 5mm...
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Thermal Printer Paper
$0.90 $1.80  
59 pc(s)
This is compatible with the Mini Thermal Printer and can be used on NETS terminal.
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Thermally Conductive Adhesive
$1.50  
22 pc(s)
This thermally conductive adhesive is used widely for heat sinks without fixed fastener, such as on voltage regulator, MOSFET, high power LED and so on. It allows heat to be transferred from IC to the heat sinks, effectively protects IC from thermal impacts, Features : Heat conductivity:...
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Thermoelectric Cooler - 40x40mm
$3.90  
4 pc(s)
Thermoelectric coolers (TEC or Peltier) create a temperature differential on each side. One side gets hot and the other side gets cool. Therefore, they can be used to either warm something up or cool something down, depending on which side you use. The Thermal Tape listed below works very...
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Transistor - NPN, 60V 200mA (2N3904)
$0.50  
113 pc(s)
These are very common, high quality BJT NPN transistors made by ON Semiconductor. Documents : Datasheet
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Transistor - PNP, 60V 200mA (2N3906)
$0.50  
151 pc(s)
These are very common, high quality BJT NPN transistors made by Fairchild Semiconductor. Documents : Datasheet
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