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Item Tag: Blue

Mini Blue DC 0-30V LED Display Digital Voltage Voltmeter Panel

Free USPS First Class Shipping. May receive as quickly as in 3 days! Featured Item Description – 100% Brand New – Measuring Range: DC5.00 ~ 30.0V – The highest input DC30.0V – If the input voltage higher than 30V, it may be permanently damage the voltmeter – Allowable error ± 1%; greater than or equal to 10V, the error is ± 0.3V; less than 10V error ± 0.10 – Input impedance : > 100K ohms – Refresh speed: about 300mS time – Display mode: three “”0.56″” LED digital tube – Opening size: about 46 x 27 mm / 1.81 x 1.07 in – Net weight: about 18g – Operating temperature: -20 Degrees Cel. to 65 Degrees Cel. Included in this package – 1X Voltmeter – Please select your color. Shipped according to your selction Shipping & Payment Payment – We require Paypal payment only. – Your order will be cancelled if the payment is not received in one week. We offer USPS First Class Shipping / Not Ecomomy – There is a big difference between USPS First Class Shipping and Economy Shipping – Ecomomic delivery could take upto 5 days even to reach the seller’s local post office – Economy are collected in bulk by a third courier and shipped to post office to receive a discount – Our orders are shipped daily and sent to USPS post office directly – Please place an order with us. You will be pleasantly surprised by our service Shipping – Delivery area: We are only shipping within 48 continental United States. – Delivery method: USPS Priority & USPS First Class. Choose Priority for fast delivery. – Handling time: 1 business day after receiving payment. If USPS is open, we are open too. – All our items are shipped with the tracking number. – Buyers are responsible to provide us with the correct address. Please confirm your address. Handling And Return – We accept return within 14 days after delivery. – Defective items will be exchanged or fully refunded on buyers request. – 15% restocking fee will be charged on non defective items. – All items need to be returned in original package with all the supplies. – Shipping and handling fees are non-refundable under any circumstances. – Our goal is 100% customer satisfaction. – Got a problem? No Problem. Contact us by eBay message system. – We will reply promptly during business hours. Customer Support – Please do not open a case or leave us a bad feedback. This can only delay our service. – Mon~Fri: 9AM to 5PM | Sa:t 9AM to 12PM | Sun: Closed (Eastern Standard Time) – If you are happy with your purchase, please leave us a 5 star feedback. Thank you. Copyright 2018 Designed and Maintained by Ameribox an eBay Store

Bob’s Ring Tester for Inductors & Transformers, Comparable to Blue RingTester

Bob’s Basic Wide Range Ring Tester for Inductors & Transformers, Comparable to Blue RingTester, CMOS ICs Please note: The picture is just to show the measurement result. The package does not include any batteries. Overview of Bob’s Basic Wide Range Ring Tester For more information, please refer to the Youtube video. https://www.youtube.com/watch?v=BgkR4e1XfhU&t=40s https://www.youtube.com/watch?v=ZIQkxwHbHKs Design and Comparison: Bob designed a basic version of the “Blue2” microcontroller-based wide range ring tester called the basic wide range ring tester. Unlike the “Blue2,” this version utilizes 4000 series CMOS ICs and through-hole components, making it accessible for individuals with electronic skills to build. It is larger than “Blue2” and operates on a 9V alkaline battery with manual power control through a push-on/push-off button. It lacks automatic turn-off and low battery warning features. Operational Principle: The tester operates by discharging a low-loss polypropylene capacitor, which is charged to 2V, into an inductor approximately five times per second. A functioning inductor or transformer winding will form a resonant circuit that produces a ringing waveform. If short-circuited turns are present, they dampen the resonant circuit, reducing the ringing. Circuit Description: The device uses the same front-end circuit as the “Blue2,” where the waveform is fed into a high-impedance JFET buffer. The waveform is then processed by half of an LM393 dual comparator with hysteresis to generate square waves until the ringing voltage decays to about 30mV peak-to-peak. The resulting square waves are counted by a CD4518B dual decade counter. The counts are displayed using a pair of CD4511B latch/decoder/7-segment driver ICs. An additional feature prevents the counter from resetting incorrectly if it reaches 99. Theoretical Use: The tester is useful for diagnosing faults in inductive components such as transformers and chokes found in electronic equipment like switch mode power supplies, LCD backlight inverters, and older CRT transformers. These components are often expensive and hard to replace, making accurate diagnosis essential. Testing Methodology: The tester is capable of testing both high-frequency types with ferrite cores and low-frequency iron-cored transformers. It outputs a low voltage that usually allows inductive components to be tested in-circuit unless other circuit faults interfere. For definitive results, components should be tested individually. Interpreting Results: High-quality ferrite-cored transformers typically show readings between 50 and 99 rings. A reading below 10 usually indicates shorted turns. However, anomalies like a fully shorted secondary winding could misleadingly show higher readings, such as 37 rings. The effect of partial shorts in primary windings can be tested by inducing shorts in secondary windings, providing a comparative analysis between suspected and known good transformers. Low-frequency transformers typically show lower readings due to the nature of their operation and materials. Recommendations for Use: Bob encourages extensive use of the tester on various transformers and inductors to develop a practical understanding of typical readings, as these can vary widely across different types and models of inductive components.

Nikon NE-101 Digital Construction Theodolite – White/Blue

The Nikon NE-101 Digital Construction Theodolite is a high-quality surveying instrument designed for precise measurements in various construction projects. With its white and blue color scheme, it is easy to spot on the job site. The digital technology provides accurate results, making it a reliable tool for engineers and surveyors. Nikon’s reputation for producing durable and reliable equipment makes this theodolite a valuable asset for any construction site.

BLUE K7214+ ESR meter circuit same as K7254, EVB & Dick Smith MKII ESR Meter

NEW Blue K7214+ ESR Meter classic circuit same as Blue ESR Meter, EVB ESR Meter, Dick Smith MKII ESR and Low Ohms Meter with translucent blue case Please note: The picture is just to show the measurement result. The package does not include any batteries. This K7214+ ESR METER is based on the famous BLUE ESR METER classic circuit, using a new low-power MCU to replace the original ZILOG Z86E0412 microprocessor, a new design of firmware, in addition to the original BLUE ESR METER all the functions, you can test hook zeroing data saved to the microcontroller EEPROM, so you do not have to do zeroing operations every time you turn on the computer. You can set the automatic shutdown time of the meter, and the shutdown can indicate the battery voltage, the battery life is much higher than the model using ZILOG Z86E0412 microprocessor. Red ultra-high brightness LED display, measurement results can be displayed more clearly. Note:Blue ESR Meter has been popular since 2007. This is the latest Bob Parker design and successor to the famous Dick Smith MKII ESR and Low Ohms Meter. This handy and cost-effective meter, can measure capacitor equivalent series resistance (ESR) in the circuit. ESR is a very important quality and performance characteristic of capacitors greater than 1uF. This meter makes quality measurements which are usually not possible to check with capacitance meters. For more ESR meter knowledge, you can visit: bobparker.net.au/esr_meter/esrmeter.htm ESR Meter (Mark II) Features * Tests electrolytics in-circuit <100mV test voltage, & test leads are non-polarized * Auto-ranging to cover 0.01 – 99 ohms * Update speed: 4 readings/second * Single push button to easily control all functions * Test lead resistance zeroing compensation is stored in non-volatile memory, You don't have to zero the test leads after every turn on * Automatic power off time adjustable from 1 to 9 minutes (0: clear auto power off) * Low battery voltage warning ('b' flashes on right-hand digit),Displays battery voltage for a few moments before shutdown * Big, easy to read 0.5 inch (13mm) high brightness LED displays * Table of typical good capacitor ESR readings on the front panel

Gradient Lens Hawkeye Blue Rigid Borescope 4mm x 175mm 90° HBR 040 177 055

Gradient Lens Corporation Hawkeye Blue rigid borescope kit, model HBR 040 177 055. Features a 4.0 mm diameter, 175 mm working length, 90° direction of view, and 55° field of view. Pre-owned condition with normal cosmetic wear from storage and prior use. Includes the rigid borescope, hard carrying case, and accessories shown in the photos. The case shows exterior wear. The unit has not been fully tested, so I am selling it as is. Please review all photos carefully for the exact condition and included items. No additional accessories are included unless pictured.

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