AC-DC & DC-DC Circuits
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As you can see in the circuit diagram this LM317 power supply electronic project require few external components. The input voltage required by this electronic project must be between 8 and 35 volt, and will provide a variable output voltage over a wide.... -
LM317HV adjustable regulator is capable of supplying in excess of 1. 5A over a 1. 2V to 57V output range. The design of these high current power supply is very easy, because the LM317HV require just few external resistors to set the output voltage. Further,.... -
This LM723 variable power supply circuit design is a very simple variable power supply that will provide an output voltage between 8 and 30 volt at a maximum output current of 3 ampere. This LM723 variable power supply circuit design project has a very low.... -
Using LM723 regulator can be designed a very simple variable power supply circuit which can provide a maximum current up to 2A and a variable voltage between 2 and 25 volts... -
This circuit is used IC number NE555 set up to stable multi vibrator. It produces a frequency rectangular patch of about 100 Hz. Out to pin 3 through C3 and C4. Before the rectifier power section. Both positive and negative DC 2 series. Positive power supply.... -
This circuit will double almost any DC input voltage as well as handling plenty of current. 12 to 24V is just an example. With a few changes, it can also supply any desired output voltage. There are many possible applications. One I can think of would be to.... -
The MAX1846 inverting circuit to implement a switch-mode power supply that provides a -15V at 0. 5A output from a 4. 5V to 12V input. This MAX1846 circuit also adds a few components to the minimum circuit implementation. C20 adds a pole to compensate for the.... -
Designing a power supply that meets the demands of Power over Ethernet (PoE) and Voice over Internet Protocol (VoIP) applications can be challenging. The low component-count power supply depicted in the figure meets these specifications without the need for.... -
Cable and xDSL modems are experiencing increasing popularity. For this reason, many designs are now required to interface with existing telephones at the subscriber`s location. The subscriber line interface circuit (SLIC) within the modem has the additional....
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Here`s how to build your own adjustable power supply based on LM317. The IC LM317 is so versatile that an almost unlimited number of different, small, high grade power supply circuits can be built using it. The configurations can be introduced for different.... -
A PB-12N23PW-05Q buzzer and I`m trying to use it with ATmega 162. I can`t connect it directly to pin, because from what I`ve read from 162`s datasheet, it can source at most 20 mA. The buzzer takes 50 (or around 25, if we take a look at the graph), so I.... -
The filter R1, R2 and C1 integrate the PWM waveform. But what is the point of the op-amp It looks like a non-inverting amplifier to me, with the gain set by R6 and R7 - if I`m not mistaken. But why does the integrated DC voltage need amplification Perhaps, I.... -
A suitable method to sense when some LEDs in my Garage Door Opener are on. A power source (perhaps the same as Vout below) runs to a 1. 5Kohm resistor which runs to 6 LEDs then a transistor of some sort. The transistor is attached to ground and pin 7 on a.... -
The ULN2003A and Zener from the driver board inside the same device. It`s a 5 wires motor, but the one in the schematic is 6 wires. I suppose the only difference is that the 5 wire version has the two center taps joined together so that`s what you see in my.... -
Although my circuit allows for different combinations of input voltages (Vin) and output voltages (Vout). The case I am debugging is with Vin=3. 6V and Vout=7. 2V. The Load was a 120 ohm resistor. I calculated the duty cycle D=0. 5 (i. e. 50%). This seems to.... -
BTW, I guess I should add another input cap for high frequency noise though that`s hardly relevant to this question (and the schematic is just a very rough test circuit anyhow). The goals are 0 - 12 V at up to 2 amps (1. 5 would probably be good enough,.... -
Rsense would cause Q2 to conduct if at a threshold (0. 65V assumably) and Rbias will determine how much it will be limited, however that is unclear to me, especially if Rsense will be somewhere highside and just turning on Q2 with my uC seems to not do.... -
Using an optocoupler ( MOC3021 ) to sense the On/Off state of an electrial appliance using a microcontroller ATmega16L. How do i go about doing this My mains supply specs are 230V, 50Hz. How do I design the surrounding circuit and select component values,.... -
A reverse polarity protection circuit, similar to that in Figure 2 of SLVA139: Reverse Current/Battery Protection Circuits. Here is my circuit: My case is slightly more complex due to the possible input voltage ranging from 5-40V. Most MOSFETs seem to have a.... -
When VOUT is very low during start-up or a short-circuit fault on the output, the switching regulator must operate at low duty cycles to maintain the power switch current within the current limit range, since the inductor current decay rate is very low.... -
Make a circuit that will allow me to switch on a relay that will turn on an LED. However, the relay is rated for 12 V, and I only have an input of 5 V, so I`m using an NPN transistor. to switch the power to the relay on and off. Here`s the schematic: If my.... -
Using an inductor inline and a decoupling capacitor it`s creating essentially a series LC circuit. Now one of the properties of LC circuits is they have a resonant frequency. I modeled a LC circuit with an attached purely resistive load to simulate what the.... -
The supply voltage is 5V and I am seeking to increase it to 12V with a load current of 1A, or an output power of 12W. I selected a switching frequency of 20kHz. By my math, I need a duty cycle of 0. 583 to do this, so the on time should be 29. 15 µs..... -
The device exhibits 24V at no load on pins +4, 5 and -7, 8. According to Wikipedia, this is called a passive power injector. I tried drawing 1A from the device and failed (some protection drops the voltage to 0V). @W5VO, thank you for your care of the.... -
An old Nokia phone charger with 5. 6 V output, so I tried to adjust it to 12 V. By changing the Zener diode though I manged to do that, but I can`t understand its circuit (I replaced the 9v1 with 16v Zener). I would really appreciate any help to understand.... -
The emitter is always going to be a few hundred milli volts behind the base voltage (in this type of configuration) and as the base voltage is 5V, depending on how much current is taken by the "switched" circuit" on the emitter, it is more likely to be 4. 5V.... -
The leads from the transformer to the circuit are quite long (>5m). Apparently the 110V side of the transformer was switched off somewhat frequently lately which likely caused a spike on the secondary (24V) side. The input pin of the LTC3631 has a visible.... -
Simple low voltage/current power supply that can accept wide range of input voltages, up to the hundreds. Let`s say, the input is 20 to 160V DC and output has to be 10V with 20ma maximum current. Since it has to be simple, I decided that it should be some....
New Circuits
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This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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