• YB27A is a LED digital voltmeter with two-wire system and red display. Its measuring range is AC 60-300V.

• Features:
  - Adopting the capacitance step-down principle design, not suitable for high frequency occasion
  - Used to monitor the household voltmeter, also applied to other AC voltmeter measure

• YB27A is a LED digital voltmeter with two-wire system and red display. Its measuring range is AC 60-300V.

• Features:
  - Adopting the capacitance step-down principle design, not suitable for high frequency occasion
  - Used to monitor the household voltmeter, also applied to other AC voltmeter measure
  - Good stability and high measurement accuracy
  - With trimmer potentiometer
  - Easy to read, install and use
• Model: YB27A
• Display Color: Red
• Supply Voltage: No Need (two-wire system)
• Measuring Range: AC 60-300V
• Accuracy: 1V
• Color: Black
• Wire Length: 140mm
• Screen Size: 38mm x 19mm
• Product Size: 47mm x 28mm x 22mm
• Net Weight: 19g
•  

• 1 x Digital Voltmeter
•  

Datasheet link : https://www.omron.com/ecb/products/pdf/en-v.pdf

Size: 12 * 12 * 7.3MM

Description:

                    Four wheel drive smart car chassis kit. Very easy to construct, just add micro-controller (such as Arduino), and sensor modules to build a fully autonomous robot.

• Car comes with tachometer wheel for rotary encoder.
• Four separate motors with gearbox allows for good maneuverability.
• Large, sturdy chassis allows greats expandability.
• 100% Brand New Mechanical structure is simple.
• very easy to install.

Specification: 

• Size:25 x 15 cm
• carrying capacity: About 1Kg
• four-wheel drive
• chassis: organic glass
  Motor:
  Voltage:  DC 3V, DC 5V, DC 6V
  Current: 100 MA, 100MA, 120MA
  Reduction rate: 48:1
  RPM (With tire): 100, 190, 240
  Tire Diameter: 66mm
  Car Speed(M/minute): 20, 39, 48
  Motor Weight (g): 50
  Motor Size: 70mm*22mm*18mm
  Noise: <65dB

Note: Motor power supply is 3V~6V. All the parameters above are tested without load.

Package include:

• 1 x Car chassis 
• 4 x Gear Motor (1:48) 
• 4 x 65mm wheels
• 8 x Fasteners 
• 4 x 24mm cylinder
• Screws
•  

Material: PLA 
Temperature: 190C to 220C Degree
Heating Bed :0 to 60C degree

Color: yellow

Weight: 1Kg

Highly accurate, digital laser photo tachometer: measure rotational speed with a visible red light beam from a powerful LED. It's a great tool to measure the RPM of motors and machine parts, the speed of a lathe or milling machine for metal or wood working, or for HVAC applications to measure fan speed. To take the measurement, apply a reflective mark (included in package) onto the target object, aim the laser beam at the mark, the RPM displays on the LCD screen. Size : 180 x 72 x 37 mm (7.0 x 2.8 x 1.5").

Features
Snap-in construction for PCB mounting
Package height : 7mm
Plastic polycarbonate housing construction which prevents crosstalk
L = long leads
Current Tranfer Ratio (CTR) of typical 10%

Application
Psition sensor for shaft encoder
Detection of reflective material such as paper, IBM cards, magnetic tapes etc.
Limit switch for mechanical motions in VCR
General purpose - wherever the space is limited

This is high performance DC to DC Step Down Adjustable Power Supply Module. Based on LM2596 Switching Regulator

Specification:
Input voltage: 3.2-40V (Input voltage must be higher than output voltage 1.5V above)

Output voltage: 1.5-35V (Adjustable)

Output current:Rated current is 2A,maximum 3A(Additional heatsink is required)

If the output power greater than 15W, the proposed combined heat sink