February 2012
M T W T F S S
« Mar    
 12345
6789101112
13141516171819
20212223242526
272829  

Pcb Voltage

Pcb Voltage
Pcb Voltage
How to prevent circuitry with DC5&24V switch from damage when SW is 5V,but 24V being inputed?

There is a dc circuitry with a switch of 5V&24V. User can choose either to operate the circuitry. But some ppl accidently input 24V when switch is at 5V position. High current flow into series of resistor & LED circuitry. This results in pcb burnout and resistor burnout.
How to prevent this even when user input wrong voltage into?
Thank you

Your easiest method would be to install a fuse that can be accessed from the outside of the enclosure so when the wrong voltage is applied the fuse will pop instead of the circuitry. There are some push-button resettable type circuit breakers available for you to use as well.



HI40024W3I H PCB VOLTAGE INVERTER FOR SAMSUNG LCD TV
HI40024W3I H PCB VOLTAGE INVERTER FOR SAMSUNG LCD TV
Paypal   US $55.00
Powered by phpBay Pro
Kendal INDUSTRAL GRADE 160 WATTS 2.5 LITERS DIGITAL HEATED ULTRASONIC CLEANER Kendal INDUSTRAL GRADE 160 WATTS 2.5 LITERS DIGITAL HEATED ULTRASONIC CLEANER

List Price: $179.00

 

Description

This brand new Large Industrial Grade Digital Ultrasonic Cleaner has powerful transducer, heater and large tank capacity for superior cleaning results, making it great for professional cleaning. It is the first utilization of digital program in ultrasonic cleaner to control the unit, according to the quantity and condition of the items to be cleaned to choose a working cycle...

Features

  • Large & Lengthened tank -- Suitable for long dental equipment and tube. Tank Capacity: 5.29 pints (2500 ml). Tank Size: 10.40" (L) x 6.46" (W) x 3.15" (H). Strong plastic screen (material ABS 757) -- Better water-proof and drop-proof ability than metal
  • Strengthened transducer makes the ultrasonic more powerful (42 KHz and 160 Watts cleaning power) and provides remarkable cleaning results.
  • Heater -- Safety and reliable with temperature up to 65 degree in Celsius (149 degree Fahrenheit )and time (45 minutes) controller -- significantly enhance cleaning.Industry IC -- To be steady in unstable voltage condition.
  • Digital program, 5 working cycles; choose freely (90, 180, 280, 380, 480 seconds). It enhances cleaning efficiency and makes it easy to operate.Some Industrial spare parts being adopted, allows its working in long time frame, and in dampness environment.
  • Circuit protector --- Protect the circuit to lengthen unit life. Radiator Fan -- To protect every parts in good condition after working a long time.Wet-proof PCB --- Good to be used in lab.
ICM280 Goodman Furnace Control Circuit Board ICM280 Goodman Furnace Control Circuit Board

 

Description

ICM280 Goodman Furnace Control Circuit Board FEATURES Includes flash code diagnostics. Twinning. Includes mounting hole template. Fused to protect low voltage system transformers. Adjustable blower relay...

Features

  • Furnace circuit board control
  • Adjustable blower relay
  • Flash code diagnostics.
  • Includes connector, wiring and instructions
  • Fused to protect low voltage system transformers
ATC Superbright shiny Led 5m RGB5050 Strip 150pcs leds,12v 3A 6W with Free Adapter&IR Receiver,waterproof IP66 (Note:15 Colors Changed in Total) ATC Superbright shiny Led 5m RGB5050 Strip 150pcs leds,12v 3A 6W with Free Adapter&IR Receiver,waterproof IP66 (Note:15 Colors Changed in Total)

 

Description

Application: Building decoration lighting Backlighting advertising signs, and words, stage Indoor hotel or business premises, counter adornment, window Personal DIY home decoration Route instructions, outdoor lighting in outline Safety and emergency lighting Automobile and bicycle decoration Features: The light can be flexible, every 3 lamp can bend, flexible adapt different occasions Maintenance free, easy to install and accessories...

Features

  • 30LEDs/m waterproof IP66
  • Long life span 50,000+ hours
  • voltage:12v Current:3A Power:36W
  • LED Qty:150 Angle:120¡ã
  • Working temperature: - 10 ~ + 80 degree
Ultrafire Li-ion 18650 3000mah Battery Ultrafire Li-ion 18650 3000mah Battery

 

Description

Protected 18650 3000mAh rechargeable 3.6 volt battery - charge with the Ultrafire Multi-Battery charger. The advantage of this cell is that it features a button top making it particularly compatible with many flashlight applications...

Features

  • Unique and New! With integrated PCB Protection
  • Lithium Ion 18650 cylindrical rechargeable batteries
  • Unique PCB design and patent pending
  • Manufactured under ISO9001-2000 to assure quality
  • Lighting or other device needing 3.7V power
Tenergy 2-Channel 18650/14500 Li-ion Battery Charger and 2 Li-ion 18650 Cylindrical 3.7V 2600mAh Rechargeable Batteries (Button Top) with PCB Tenergy 2-Channel 18650/14500 Li-ion Battery Charger and 2 Li-ion 18650 Cylindrical 3.7V 2600mAh Rechargeable Batteries (Button Top) with PCB

 

Description

Specifications
* Worldwide voltage for 100-240V AC
* Input: DC 12V 1000mA
* Output: DC 4.2V 1000mA per channel
* Applicable battery type: 18650/14500 rechargeable Li-ion battery

Warning

* Don't disassemble the charger
* Don't charge other types of battery...

Features

  • Two independent charging channels for individual charging and detection
  • Constant current and constant voltage charging mode
  • Reverse polarity protection. It automatically terminates charging and the LED flashes red when the polarity is reversely connected
  • Li-Ion 18650 cylindrical rechargeable batteries with Internal Voltage protection PCB!
  • Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V.
UltraFire 14500 AA sized 3.6V Li-Ion Rechargeable Battery 900mAh CR 14500 Lithium Ion UltraFire 14500 AA sized 3.6V Li-Ion Rechargeable Battery 900mAh CR 14500 Lithium Ion

List Price: $16.00

 

Description

UltraFire Battery LC14500 3.6V Capacity: 900mAhRechargeable for 600-800 timesPeak Voltage: 4.2VNominal/Working Voltage: 3.6VTemparature: -40C~60CDimension: 14x50mmUnprotected Button Cell - use with appropriate cautions...

Features

  • 900mAh 14500 Li-ion Rechargeable Battery
  • Holds 85% of it's charge over 12month period
  • Can be charged over 500 times
  • Lighter than standard alkaline battery
MSI R6950 Twin Frozr III 1G/OC Radeon HD 6950 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card MSI R6950 Twin Frozr III 1G/OC Radeon HD 6950 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card

List Price: $283.86

 

Description

MSI R6950 TWIN FROZR III 1G/OC Radeon HD 6950 Graphic Card - 850 MHz Core - 1 GB GDDR5 SDRAM - PCI Express 2.1 x16 R6950 TWIN FROZR III 1G/OC Video Graphics Cards

Features

  • Chipset: Radeon HD6950
  • Engine Clock: 850 MHz
  • Video Memory: 1GB DDR5
  • Memory Clock: 5200 MHz
  • Memory Interface: 256-bit
  • Bus: PCI-Express 2.0 x16
  • MSI Exclusive P/S Switch Function Two fan speed profiles - Performance / Silence Performance Mode provides best cooling demand; Silent Mode balances noise and GPU Temperature
  • Military Class ll Component Hi-C CAP for GPU provides more precise voltage.SFC (Super Ferrite Choke) has higher current for better overclocking ability. All Solid CAPs have longer lifespan
  • Propeller Blade Technology MSI's exclusive innovation design.20% more airflow. Cool down more components on the PCB.11? cooler and 13.9dB quieter than reference HD 6950.
  • RAMDAC: 400 MHz
  • Thermal: Fansink
Tenergy Li-Ion 18650 Cylindrical 3.7V 2600mAh Flat Top Rechargeable Battery w/ PCB Tenergy Li-Ion 18650 Cylindrical 3.7V 2600mAh Flat Top Rechargeable Battery w/ PCB

 

Description

Applications

* Lighting or other device needing 3.7V power
* Building portable power device needing high energy density and low weight

Warning

* Use special caution when working with Li-ion cells, they are very sensitive to charging characteristics and may explode if mis-handled...

Features

  • Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V. UNIQUE INTERNAL PCB!
  • Dimensions:Diameter 18+/-0.2 mm Height 66+/- 0.2mm
  • Higher energy density and lower weight than other types rechargeable batteries
  • Building portable power device needing high energy density and low weight
  • Cycle Performance: 90% of initial capacity at 400 cycles, Cycle life: > 500 cycles

Leave a Reply

 

 

 

You can use these HTML tags

<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>