As shown in Figure 10-3, IC1 and R1 ~ R3, RP1 ~ RP3 form overvoltage, undervoltage sampling and R-S trigger circuit, when the mains voltage is below 17...
Circuit stores transducer output while transducer is momentarily disconnected during pulse period by relay drive circuit that operates coincidentally w...
In the figure is the loudspeaker protection circuit. The circuit is designed to have the left and right channels and they work separately.Elements sele...
As the figure 15-8 shows, the protector is composed of the step-down rectifier circuit, the over-voltage under-voltage detection circuit and the delay ...
The pressure sensitive resistor is always connected with the input port of the protected electrical in the circuit, as the figure shows. From the figur...
The a,b,c,d are power supply protection circuits of TL431.The picture (a) is constant current circuit of TL431 and the constant current I。=UREF/R2.Pi...
The figure shows the overheat protection system circuit composed of MIC2951. The temperature threshold value of circuit is set by the adjustment R2....
View Full Size Image View Original Datasheet A high input impedance amplifier permits the use of large valued input resistors and retains signal accura...
That circuit protects the overdriven signals going into an amplifier. Instead of a zener diode we use a transistor. That way we ensure that the above t...
External boost transistor is used with National LM340T-15 regulator to boost output current capability to 5A without affecting such features as short-c...
Tachometers monitor belt slip and feed four-leg magnetic amplifier which controls conveyor drive relay K2. If tachometer outputs do not match because o...
This circuit uses an SCR and an RC circuit to delay application of power to a mobile radio or other equipment. This is to provide protection from start...
Here is to introduce an engine high temperature protector which can cut of the igniting power supply when the water in the tank is hotter than 90℃, s...
See as the circuit, the +24V is generated by stepping down the 110V power supply. When the touch spot JK of the magnetic sucker circuit is closed, the ...
Figure 3-27 shows the typical application circuits and pin configurations for the MAX202E,232E. Figure 3-28 shows the MAX211E, 213E, 241E. These ICs ar...
The preamplifier is protected from excessive input signals of either polarity by the 2N5909 junction field-effect transistor. A nulling circuit makes i...
The picture shows the dual track loudspeaker protection circuit. It is designed that the left and right tracks are working independently. In the pictur...
Work principle Circuit is shown as above.Mains voltage reduces voltage by C3,maintains voltage by DW,VD6,VD7,C2 rectifier filter output maintaining DC ...
The following is a circuit used toprotect the defult-phases of three-phase three-wire power sources. Without anyone of A,B or C, the electrical level (...
The circuit is protected from short circuit and input back. If the inductance value chosen will not be supersaturated, reducing voltage stabilizer LT34...
The original Crossing Diamond Protection circuit is used in several places on the London Model Railway Group's - O Scale layout. The first installation...
When it comes undervoltage or overvoltage state, D2 or D1 turns on, IC's 2 foot and 6 foot are high level(2/3 VDD), then 555 circuit is turned reset, 3...
The circuit is shown in the figure. It is used in power supply circuit. It can cut off the power when it is overvoltage or power-off phase. So that the...
The protector can cut off the power supply automatically and and issue intermittent alarm sound and lighting instructions when the main power protector...
If the RS flip-flop reset still in the over-current condition, the level of FF1's Q-side is always high. It continues to cut off the device power suppl...
When you switch on your amplifier, you can see your speaker pop up with high power, and it can be harmful to your speaker. To make your speakers life t...
The signal from the sampling circuit is amplified by voltage, whichmakes the collector potential of VTl, VT2 close to 0V, the ② pin of IC's is at the...
This is an electrical circuit protection device sound disappeared, when too much voltage 220V, and protection, when pressure is too low with Using the ...
MOSFET requires very careful handling particularly when out of circuit. In circuit a MOSFET is as rugged as any other solid-state device of similar con...
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