The First Job Fair for Suppliers in HQEW.net

On April 23, 2011, in order to help the suppliers, who are the members of HQEW.net, find some excellent sales to expand their foreign markets, IBD (International Division) of HQEW.net held the job fair for them. Although this fair was held by HQEW.net for the first time, it was really quite successful that both the sales and suppliers were very satisfied with it.

At present, quite an amount of companies directors reflect that it is very difficult for them to find some excellent sales, which would influence the development of their business and impede them to exploit oversea markets. However, the oversea markets are quite potential and any company, who intends to develop its company further, should pay enough attention to these markets. Nevertheless, although many companies realize the potential oversea markets, they could not find some great sales, which is really a big trouble for them to go forward. Therefore, in order to help suppliers in HQEW.net to handle this predicament, IBD of HQEW.net held its first job fair to try to recruit some capable sales for them.
On that day, on the one hand, many interviewees who are good at international business came to HQEW.net, F/r 7, 2# Building, Huaqiang Holdings Group. On the other hand, the representatives of some companies, such as, Shuangzhi (HK) Electronic Co., Limited, Shenzhen Honton Electronics Technology Co., Limited and so on, had paid a visit to our company as well. The interview of this fair mainly contains several parts, such as, group interview and one to one interview. In the group interview, the interviewees should display themselves to all interviewers. And then, the representatives of the suppliers would pick out their favorite interviewees to interview them separately. This fair held very successfully and after the rounds of interviews, both interviewers and interviewees showed their satisfaction to this fair as well as our company.
Keeping the faith, “customers first”, in mind, IBD of HQEW.net held this job fair to help suppliers in HQEW.net find the excellent sales and further promote the development of their international business. It is turned out that both interviewers and interviewees were quite satisfied with this movement and they hoped this movement would be held further in the future. Meanwhile, HQEW.net was so happy for the ending and expressed that the company would continue to concern for the customers and chair this kind of movement henceforward.
Details on: http://www.hqew.net/topics/1st-electronics-job-fair/

Driver Amplifier Troubleshooting With LM339

Enlarged part of the test drive transistor Q9 collector voltage of +18 V to the normal, measuring 10 feet LM339 comparator inverting input voltage of +4.6 V to normal. When the voltage is low, then change the value of resistance R31. Measuring 11 feet LM339 comparator inverting input voltage of +0.4 V to normal, when the voltage is low, the capacitor C15 leakage. LM339 comparator measuring 13 feet on the ground +0.02 V output voltage is normal, when the voltage is low, the capacitor C101 leakage, or the transistor Q8, the base B and emitter E breakdown damage, after the replacement of damaged components troubleshooting.

Also: When the diodes D17, D19, transistor Q8 parameters of failure, the capacitor C25 leakage, synchronous voltage comparator circuit, the driver amplifier is damaged, were caused by induction an “alarm does not heat” fault. This method is suitable for: United States cooker main circuit board repair circuit using monolithic LM339 reference, with 500 “list with three” test subject.

The Overview of LA8632 and LA8632M

The LA8632 and LA8632M are low-voltage, low-current compander Ics for battery-powerd, cordless telephone applications.

The LA8632 and LA8632M features a good signal-to-noise ratio and a high dynamic range at voicesignal frequencies. The output compression is given by V0 =0.5㏒ V1, and the expansion, by the inverse operation.

The LA8632 and LA8632M feature an FSK comparator for receiving FSK-modulated digital data, a microphone amplifier, selectable intercom or telephone operation expander outputs, and an putput mute control.

The LA8632 and LA8632M operate from a 2.4 to 6.0V supply and are available in 24-pin DIPs and 24-pin MFPs.

For more capacitor, please visit http://www.partsparty.com/index.php/category/capacitors/

The Features & Applications of 2SB1121 and 2SD1621

Electronic components – 2SB1121 and 2SD1621 are Planar Silicon Transistors, the following are their features and applications.
Features

• Adoption of FBET, MBIT processes.
• Low collector-to-emitter saturation voltage.
• Large current capacity and wide ASO.
• Fast switching speed.
• Ultrasmall size making it easy to provide highdensity, small-sized hybrid IC’s.

Applications

• Voltage regulators, relay drivers, lamp drivers, electrical equipment.

More: http://www.partsparty.com/index.php/the-features-applications-of-2sb1121-and-2sd1621/

How Many do You Know About LM386?

LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200.

The inputs are ground referenced while the output automatically biases to one-half the supply voltage. The quiescent power drain is only 24 milliwatts when operating from a 6 volt supply, making the LM386 ideal for battery operation.

For more information about LM386, please visit electronic world

Electronic Components Prices in 2011—Rise or Not?

Because of the increasing costs of labor and raw materials, it is expected that some electronic components will rise in their prices in some degrees. Based on the market survey, inductors and electrolytic capacitors belong to these electronic components as well.
Actually, manufacturers do not insist that the prices of all electronic components will go up in 2011, for example, OVP parts. Lots of manufacturers believe that the price of OVP parts will be stable and will not rise obviously in this year. By contrast, as for aluminum electrolytic capacitors market, some experts of IC components industry, for example, Liu Quanwang, aluminum electrolytic capacitors product marketing director of TDK-EPC group member, Greater China EPCOS, suggest that the price of aluminum electrolytic capacitors would develop in the rising trend. The reason for this phenomenon of electronic components market is the rising cost of some raw materials and energy costs. Moreover, it needs to point out that the raw materials above refer to aluminum and papers and so on; while, energy costs consist of the main production costs of anodic aluminum foil.
At the same time, the costs of labor in China rise rapidly as well and some specialists predict the increasing trend of the cost of Chinese labor will continue in the coming years. What’s more, tantalum electrolytic capacitors’ situation is similar to aluminum electrolytic capacitors’ which has been introduced above. According to the above analysis, some but not all electronic components will rise in their prices in 2011.

Pin Configuration of NE555

Pin 1 (GND) – ground, usually connected to the circuit common ground.

Pin 2 (Trigger) – This pin is the trigger to start it NE555 period of time. Trigger signal on the edge of the voltage must be greater than 2 / 3 VCC, the lower edge shall be less than 1 / 3 VCC.

Pin 3 (output) – When the time period began 555 output the output pins to move less than the supply voltage of 1.7 volts of high potential. End of a cycle back to O volts output of the low potential. High potential around the time of maximum output current of 200 mA.
Pin 4 (Reset) – sent to a low logic potential of this pin will reset the timer and when the output back to a low potential. It is often not receiving the positive supply or ignored.
Pin 5 (Control Voltage) – to allow the pin voltage changes by external trigger and gate threshold voltage. When the timer is operating in a stable or oscillating mode of operation, this input can be used to change or adjust the output frequency.
Pin 6 ( Threshold) – Pin 6 output was low and to reset the lock state. When the pin voltage from 1 / 3 VCC voltage of the following go to 2 / 3 VCC above start this action.

Pin 7 (Discharge) – The main output pins and pin have the same current output capacity, when the output is ON when LOW, a low impedance to ground, when the output is OFF HIGH, high impedance to ground.
Pin 8 (Vcc) – This is a 555 timer IC’s positive power supply voltage.

Source: http://www.partsparty.com/index.php/pin-configuration-of-ne555/