Happy Puppy Vintage Computers

The Corsair CMPSU-650TXV2 Enthusiast Series TX650 V2 Power Supply is designed for high-performance, multi-core, multi-graphics PCs. The Corsair CMPSU-650TXV2 Enthusiast Series TX650 V2 Power Supply features a 53A single +12V rail - essential for reliably powering multiple graphics cards. Extra-long cables support full tower chassis, and 80Plus Bronze certified efficiency guarantees cool, quiet operation with minimal wasted energy.

Supports the latest ATX12V v2.3 and EPS12V 2.91 standards and is backwards compatible with ATX12V 2.01 systems.Double forward switching circuitry design offers high efficiency, up to 90% under wide load range.Active Power Factor Correction with PF value=0.99 provides clean and reliable power to your system

The Corsair CMPSU-850TXV2 Enthusiast Series TX850 V2 Power Supply is designed for high-performance, multi-core, multi-graphics PCs. It features a 70A single +12V rail - essential for reliably powering multiple graphics cards. Extra-long cables support full tower chassis, and 80Plus Bronze certified efficiency guarantees cool, quiet operation with minimal wasted energy.

Boss Audio 10 FARAD CAPACITOR DIG VOLT DISP BLUE ILLUMnull

3.5 Farad Capacitor with Digital Voltage Display (Silver Finish)

Boss Slv 2Farad Capacito; 2 Farad Capacitor With Digital Voltage Display; Silver Finish; 2 farad capacitor digital voltage meter

The CMOS technology area has quickly grown, calling for a new text--and here it is, covering the analysis and design of CMOS integrated circuits that practicing engineers need to master to succeed. Filled with many examples and chapter-ending problems, the book not only describes the thought process behind each circuit topology, but also considers the rationale behind each modification. The analysis and design techniques focus on CMOS circuits but also apply to other IC technologies.

Metal-dielectric interfaces are ubiquitous in modern electronics. As advanced gigascale electronic devices continue to shrink, the stability of these interfaces is becoming an increasingly important issue that has a profound impact on the operational reliability of these devices. In this book, the authors present the basic science underlying  the thermal and electrical stability of metal-dielectric interfaces and its relationship to the operation of advanced interconnect systems in gigascale electronics. Interface phenomena, including chemical reactions between metals and dielectrics, metallic-atom diffusion, and ion drift, are discussed based on fundamental physical and chemical principles. Schematic diagrams are provided throughout the book to illustrate  interface phenomena and the principles that govern them. Metal-Dielectric Interfaces in Gigascale Electronics  provides a unifying approach to the diverse and sometimes contradictory test results that are reported in the literature on metal-dielectric interfaces. The goal is to provide readers with a clear account of the relationship between interface science and its applications in interconnect structures. The material presented here will also be of interest to those engaged in field-effect transistor and memristor device research, as well as university researchers and industrial scientists working in the areas of electronic materials processing, semiconductor manufacturing, memory chips, and IC design.

!!! Find Solution to Your Laptop Motherboard Problems !!! Component Level Motherboard Repair (Not Replacement)Problem:How do you diagnose motherboards on a component level. Solution: I find it is very hard to explain this. actually, it is very simple and can be described in two words: current and signal. read the current change during booting tells you where the machine stopped. check the signals on the different part of motherboard tells what is wrong or what may be missing.Problem: How do you diagnose the exact component failure?Obviously, a burn mark is a dead give away, but what if there are no visual signs? Do you poke around with a multi-meter?With what voltage settings and how do you know what to look for?Is it usually a bad capacitor?What about a bad connection?How do you perform the component level repair?Solution: [Answer to all your above questions]This is the hardest part in notebook repair. Basically, we measure voltages on motherboard and there are few power supply range from 1V to 12V on the motherboard. For example, north bridge needs 1.05V, 1.2V, 1.5V, 1.8V, 2.5V, depends on model of north bridge.We also measure all sort of signals, such as PCIRST, CPURST, CLK. We measure the resistances of each AD line from north bridge to CPU/RAM.We watch the current changing patterns to get rough idea where is the problem.There are some simple steps to follow when checking a notebook motherboard:1. make sure main system powers are ready, that is 3V and 5V.2. switching circuit is ok, which involves IO/Keyboard controller, south bridge3. power sequence is ok, which you can see the current jump up and down for few times.4. all the necessary signals are not missing.About Bad Cap:It happens but only about 10% in those motherboards need to repair, and it is the easiest fault to repair no matter if the cap was burnt or not.Loose connection:Mostly happen on VGA chips, south bridges and the places close to CPU. Hard to troubleshoot and need lot of experiences.Tools are: smd rework station, bga rework station, power supply with current meter.All the datasheets for the components, especially the schematic diagram, you will find it much difficult without it.Case Study"Machine: HP G6000Problem: Laptop will not power up, completely deadFinding The Fault:Check Max8724(the battery charging chip) first, because to make system has standby power this chip must work correctly. This is a 28 pin chip, we only need to test 1, 2, 4, 8, 10, 11 pin. They are VIN(main power for chip), LDO(provide 3.3V for chip itself in order to set REF voltage, also provide signal to drive 2 MOS to charge battery), REF(set reference voltage of the chip), SHDN#(enable/disable chip, a switch), ACIN(indicate the power supply has plugged in), ACOK#(power adapter ok with mainboard).Everything ok except 10 pin, ACIN is 0V. This is incorrect, mainboard doesn’t detect there is an adapter! Trace it backward and find it is very simple – mainboard use 2 resistors to pull the input voltage(19V, directly from dc socket) down to about 4V, so test the first resistor and find it opened. Change it and 3V/5V power come up and mainboard be able to switch on.Then the trouble start when I try to charge the battery. The charging current never go beyond 0.15A and after 10 seconds the charging light start to flashing. Also can’t switch on from battery. First, change Max8724, still same problem. Next check all the resistors around max8724 and change it if it has any sign of watering, still no good. Then change KB3926(EC/KBC, chip monitors the statue of battery), still same.Decide to check MBDATA and MBCLCK, 2 signals that send battery information from battery to KB3926 before I give up. I find the MBDATA is short!Finally, find there are 2 pins stick together on CN10,Fix it and it start to charge battery Switch on with power adapter, ok. Remove the power adapter once switch on, put the CMOS battery back and everything work perfectly.

!!! Find Solution to Your Laptop Motherboard Problems !!! Component Level Motherboard Repair (Not Replacement)Problem:How do you diagnose motherboards on a component level. Solution: I find it is very hard to explain this. actually, it is very simple and can be described in two words: current and signal. read the current change during booting tells you where the machine stopped. check the signals on the different part of motherboard tells what is wrong or what may be missing.Problem: How do you diagnose the exact component failure?Obviously, a burn mark is a dead give away, but what if there are no visual signs? Do you poke around with a multi-meter?With what voltage settings and how do you know what to look for?Is it usually a bad capacitor?What about a bad connection?How do you perform the component level repair?Solution: [Answer to all your above questions]This is the hardest part in notebook repair. Basically, we measure voltages on motherboard and there are few power supply range from 1V to 12V on the motherboard. For example, north bridge needs 1.05V, 1.2V, 1.5V, 1.8V, 2.5V, depends on model of north bridge.We also measure all sort of signals, such as PCIRST, CPURST, CLK. We measure the resistances of each AD line from north bridge to CPU/RAM.We watch the current changing patterns to get rough idea where is the problem.There are some simple steps to follow when checking a notebook motherboard:1. make sure main system powers are ready, that is 3V and 5V.2. switching circuit is ok, which involves IO/Keyboard controller, south bridge3. power sequence is ok, which you can see the current jump up and down for few times.4. all the necessary signals are not missing.About Bad Cap:It happens but only about 10% in those motherboards need to repair, and it is the easiest fault to repair no matter if the cap was burnt or not.Loose connection:Mostly happen on VGA chips, south bridges and the places close to CPU. Hard to troubleshoot and need lot of experiences.Tools are: smd rework station, bga rework station, power supply with current meter.All the datasheets for the components, especially the schematic diagram, you will find it much difficult without it.Case Study"Machine: HP G6000Problem: Laptop will not power up, completely deadFinding The Fault:Check Max8724(the battery charging chip) first, because to make system has standby power this chip must work correctly. This is a 28 pin chip, we only need to test 1, 2, 4, 8, 10, 11 pin. They are VIN(main power for chip), LDO(provide 3.3V for chip itself in order to set REF voltage, also provide signal to drive 2 MOS to charge battery), REF(set reference voltage of the chip), SHDN#(enable/disable chip, a switch), ACIN(indicate the power supply has plugged in), ACOK#(power adapter ok with mainboard).Everything ok except 10 pin, ACIN is 0V. This is incorrect, mainboard doesn't detect there is an adapter! Trace it backward and find it is very simple - mainboard use 2 resistors to pull the input voltage(19V, directly from dc socket) down to about 4V, so test the first resistor and find it opened. Change it and 3V/5V power come up and mainboard be able to switch on.Then the trouble start when I try to charge the battery. The charging current never go beyond 0.15A and after 10 seconds the charging light start to flashing. Also can't switch on from battery. First, change Max8724, still same problem. Next check all the resistors around max8724 and change it if it has any sign of watering, still no good. Then change KB3926(EC/KBC, chip monitors the statue of battery), still same.Decide to check MBDATA and MBCLCK, 2 signals that send battery information from battery to KB3926 before I give up.

The Tekpower TP4000ZC is a digital multimeter with a RS232 interface, via which you can connect your PC to monitor the real time measurement and also plot and save your data on your computer. This meter is auto/manual range selectable, you can use it to measure a wide range of parameters including AC/DC voltage and current, as well as resistance, capacitance, frequency and so on. This meter is brand new in its factory box with a one year manufacturer's warranty. Accessories include Test leads, 2 AA alkaline batteries, Thermo probe, RS232 cable , Software & User manual.

Part No. SPP6 Series PTC Capacitor Combination, Operating Voltage (VAC) 90 - 277, Recommended Range (hp) 1/2 to 10, Increase in torque (%) 500%

# Slim body and jaws fit into tight places # Measurements can be done with one hand # Improved low current measurement accuracy # Includes batteries, carrying case and instruction card

Spektrum Voltage Protector. #SPM1600 Features: For DSM system Prevents voltage drops to receiver Plugs into any open channel slot Notes: Spektrum's new Voltage Protector prevents a DSM™ receiver's voltage from dropping below the proper operating level in lower voltage applications such as 4-cell 1/12 carpet racers. Installation is as simple as plugging it into an open channel slot on the receiver unit. This Voltage Protector is not intended for Aircraft use.

50,000 Volts That's what you get with this tesla coil!! Brand new, commercial item, great for classroom demonstrations and experiments. The 50,000 volt capacity generator radiates high frequency energy through space... enough to light fluorescent tubes two feet away. It uses 115 VAC (60 Hz) with an electro-magnetically operated interrupter buzzer, high voltage capacitors, inductive coil transformer, and a monopolar high frequency transformer generator to do the trick. 11" high, with a 6" sq. x 2" high protective housing for the generator. Includes accessories and instruction booklet with 19 experiments. Pretty amazing. But please, this is not a toy and should be used only under adult supervision.

So you're not into accessory head instruments but still want a great meter design for HVAC/R, the SC67 is a great choice. It's a manual ranging clamp on meter that includes most of the electrical ranges you use for HVAC/R plus temperature, up to 1000 degrees Fahrenheit with a compatible k-type thermocouple, for a great price. It also has several safety features like a high-voltage LED and beeper, a continuity warning, push button non-contact voltage (NCV), a lead holder on the clamp, and MAX hold so you can concentrate on the test point, hook up, and see the results after you've disconnected. It also includes capacitance (MFD) for checking motor-start and motor-run capacitors and microamps DC for flame diode tests. Techs tell us It's a solid performer for everyday HVAC/R testing.