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YB27A -AC60-300V RED Digital Voltmeter
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Main Features:
  • YB27A is a LED digital voltmeter with two-wire system and red display. Its measuring range is AC 60-300V.
Product Descriptions:
  • 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
Main Features:
  • YB27A is a LED digital voltmeter with two-wire system and red display. Its measuring range is AC 60-300V.
Product Descriptions:
  • 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
  •  
Package Including:
  • 1 x Digital Voltmeter
  •  

Limit / Endstop Switch SV-166-1C25
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Datasheet link : https://www.omron.com/ecb/products/pdf/en-v.pdf


Size: 12 * 12 * 7.3MM

4WD 4 wheel Smart Robotic Car Chassis
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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
  •  

1.75mm PLA Yellow 3D printer filament 1Kg (Economy )
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Material: PLA 
Temperature: 190C to 220C Degree
Heating Bed :0 to 60C degree

Color: yellow

Weight: 1Kg

RPM Meter / Digital Laser Photo Tachometer
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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").

TCRT5000 Reflective Optical Sensor IR
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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

LM2596 DC to DC (buck) 4.5v to 40v Adjustable step Down Power Supply Module
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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

Product Description

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.

Conversion efficiency: Up to 92% (output voltage higher, the higher the efficiency)

Switching Frequency:150KHz

Rectifier: Non-Synchronous Rectification

Module Properties: Non-isolated step-down module (buck)

Short circuit protection: current limiting, since the recovery

Operating temperature:Industrial grade (-40 Deg C to +85 Deg C) (output power 10W or less)

Full load temperature rise: 40 Deg C
Load regulation: ± 0.5%
Voltage regulation: ± 0.5%
Dynamic response speed: 5% 200uS
Size: about 50 (L) * 23 (W) * 13 (H) mm (with potentiometer)

Output ripple:
Input 12V Output 5V 3A 60mV (MAX)
Input 24V Output 12V 3A 120mV (MAX)

Notice: the step-down module, the input voltage must be higher than the output voltage.

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