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The output current issensed across R8, This is delivered to the current-limit arrtplifier through R7, across which the foldback potential is developed by R6 with a threshold determined by D4. The values given limit the peak power below 20 W and shut off the....
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This display uses ten LED`s to display a voltage range from 10. 5 to 15 volts. Each LED represents a 0. 5-volt step in voltage. The heart of the circuit is the LM-3914 dot/bar display driver. Trimmer potentiometer R5 is adjusted so that 7. 5 volts is applied....
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The circuit shown earlier in figure 2-6 and the discussion in previous paragraphs were for illustrative purposes only. In reality, such a circuit would not be practical. However, the basic principle involved (the change in reactance of an oscillator circuit....
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The first option is of course a zener. I actually have a bunch of 2. 2V which would protect the capacitor fine. The problem is, of course, half the energy is going to be wasted across the diode short. Is there any way I can regulate the voltage below 2. 3V....
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The very small DC voltages at the output of the diode detector are difficult to amplify accurately. DC offsets introduced by any op-amp are the main culprit. Low frequency noise (1/f noise) is another. Chopping the DC with MOSfet switches is an excellent way....
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This current-limiting circuit, shown in this example as part of a small bench power supply, could in principle be used in conjunction with any dual-rail current source. The part of the circuit to the left of the diagram limits the current at the input to the....
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It functions like almost any 555 astable timer, except that the LED is inserted into the capacitor reset path so that when pin 7 discharges C1 to common, this relatively high current must pass through the LED. In this way, the average battery current is only....
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The input stage of this voltmeter circuit uses operational amplifier and diode feedback to form linearity peak value rectifier circuit. Through R2/R2 partial pressure isolation, it is sent to double multi-channel BCD output A/D converter CA3162E, it also can....
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The VNGBOX micro needs to produce a very accurate, high resolution and very noise-free DC control voltage to steer the reference oscillator phase accurately. Any noise on this signal will result in noise on the reference; any non-linearity, especially any....
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Buffering for the zener is provided by the impedance matching and current amplifying characteristics of the emitter follower and draw less current from it. To....
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Using the LTC4000 high voltage controller designed by Linear Technology, can be designed a very simple high current LiFePO4 battery charger that will provide a fixed output voltage of 12 volts at a maximum output current of 15 A. Features of the LTC4000`s....
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The ISL62386 controller generates supply voltages for battery-powered systems. The ISL62386 includes two pulse-width modulation (PWM) controllers, adjustable from 0. 6V to 5. 5V, and two linear regulators, LDO5 and LDO3, that generate a fixed 5V output and a....
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Frequency modulation (FM) can be used to transmit analog voltage level signal with good noise immunity. The transmission itself might employs different....
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The MOSFET`s could be in parallel pairs for even more power. Just give each its own 470 © gate resistor and a 22k © from each gate to source. The large 1000 µF capacitor and 47 © resistor used to clean up the voltage spikes coming from the transformer centre....
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Ring current generator The ring current generator can produce a ringing current voltage of 75-90V and 25Hz±5HZ. It is available to be used for vibrating ring in communication devices, for example, carrier, ultrahigh frequency, wire telephone. It can also be....
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This is the most simple and affordable solar battery charger that the hobbyist can make. It has a few drawbacks over other similar controls, but offers numerous advantages. It is intended for charging lead-acid batteries, but may also be used for charging....
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This V/I display module is eminently suitable for building into an existing DC power supply, where it gives a precise indication of the set voltage or the current consumption of the load. In the voltage range, the decimal point lights on LD3, and the....
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The photo above clearly illustrates phase angle control: output voltage controlled by the gate drive signal applied to a thyristor. What is phase angle control That is what I`m going to talk about in this article. Phase angle control is a method of PWM....
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This is a simple ceiling fan regulator circuit diagram. It is used to control the speed of a ceiling fan. In the other words it is an AC motor speed controller circuit, as because it`s control the speed of a AC motor(Ceiling Fan). This ceiling fan regulator....
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A very simple high efficiency switching power supply electronic circuit project can be designed using the LMZ13608 8A regulator. This 8A switching power supply regulator electronic project based on the LMZ13608 has an very high efficiency and require few....
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This circuit employs the popular and easy to find LM3914 IC. This kind of IC is quite very simple to drive, requires no voltage regulators (it features a built in voltage regulator) and can be powered from almost every resource. Once the test switch is....
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The advantages for a guitar amplifier are the very simple circuitry, even for comparatively high power outputs, and a certain built-in degree of loudspeaker protection, due to capacitor C8, preventing the voltage supply to be conveyed into loudspeakers in....
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Amplifier device that accepts a varying input signal and produces an output signal that varies in the same way as the input but has larger amplitude. The input signal may be a current, a voltage, a mechanical motion, or any other signal; the output signal is....
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The LM1036 is a DC controlled tone (bass/treble), volume and balance circuit which can be applied in car radio, TV and audio systems. Loudness compensation to....
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This web page is provided to offer assistance and information to anyone that is wanting to construct a Tesla coil. I encourage you to make use of the other resources we offer on this page. I live in the United States, and in this country the electrical line....
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This is a Logic probe circuit is one, That is suitable for checking the voltage levels in the TTL circuit. It receives from the circuit being tested. Shows how high or low logic level one. The circuit when the input voltage to the probe Tip is higher than 2.....
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Voltage regulator IC`s, with 3 pins, from LM7805 and LM7812 series are excellent for usage in voltage regulator circuits. If you need higher currents, up t....
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This is a modification of the circuit Simple Lamp Dimmer/Fan Regulator previously posted here. The working of the circuit is same as that of the previous, but in addition a snubber circuit consisting of resistor R4 and capacitor C3 is included to improve the....
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This last article on bipolar junction transistors (BJT) is a potpourri of circuits. Some are practical and some are not so practical, but they can be great for experiments. With these circuits you can amplify signals, filter high and low frequencies,....
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V1 and V2 are 12AX7 dual triodes. Each half of V1 is wired as a Class A voltage amplifier in a configuration known as Common Cathode. By comparison, both halves of V2 are wired together in the Cathode Follower configuration for current gain. Don ’t freak....
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The telephone ring generator shown below generates the needed high voltage from a simple switching mode power supply (SMPS) which employs a CMOS Schmitt Trigger square wave oscillator, 10 mH inductor, high voltage switching transistor (TIP47 or other high....