The triode output characteristic curve describes the relationship between UCE and lC under the condition that the base current IB is constant. Since the oscilloscope is a kind of voltage measuring instrument, the collector current can only be converted into voltage to be displayed by the oscilloscope. The CH2 channel measures the voltage drop across the sampling resistor as the oscilloscope's Y-axis input (IC), and the CH1 channel measures the collector voltage as the X-axis input (UCE). The oscilloscope operates in X-Y mode to measure the characteristic curve of the triode.
When the base current IB is a constant current (this design will achieve a stepping current source of: 25, 50, 75, 100, 125, 150, 175, 200 u A total of eight steps), at the collector By applying a synchronous sawtooth wave, the output characteristic curve of the transistor can be observed. Figure 1 is a system block diagram, which is mainly composed of a synchronization signal, a step current source circuit, a sawtooth wave circuit, etc.; FIG. 2 is a schematic diagram of an oscilloscope expanded into a transistor characteristic diagram.
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FUNCTION DESCRIPTION
Countdown socket has an AC outlet, the maximum can output 230 V16A of power, there are two control modes, that is, countdown off and countdown on. It is convenient to control the equipment which needs to switch off or turn on AC. improve the safety of the use of some equipment and save more energy.
SET TIMER
1,Countdown plug in the socket, all indicator lights red flash three times, at this time the socket has no output, for the normal state, into the countdown state. Click the button, the first red light up, the socket output after an hour off, and then short press the button can set the socket timing of 2 H.4H.6H.8H.10H.OFF.
2,Long press button 3s, all indicator lights green flash three times, at this time the socket has output, for the regular open state, into the countdown on state. Click on the button, the first green light on, the socket is closed an hour later, and then press the button to set the socket countdown 2 H.4H.6H.8H.10H.OFF.
3,Press button 3 longer S, all indicator lights red light flash 3 times again into countdown mode.
4,Select the required countdown time mode, the corresponding mode countdown lights up, start countdown until the end of the countdown time. The outlet that controls the output will start or stop the output.
5,After the countdown starts, the time indicator will change automatically from high to low until the countdown is over.
NOTE:
1,Check that the power connection is good.
2,Use only indoors and in dry places.
3,This product does not convert AC voltage.
4,Maximum load not exceeding 16A 3680W.
5,Grounding is required for safety.
6,Any questions, please contact the electrician.
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NINGBO COWELL ELECTRONICS & TECHNOLOGY CO., LTD , https://www.cowellsockets.com