LM317T Voltage Regulator with Pass Transistor

Voltage Regulator, Voltage Regulator Circuit, Working of Zener Diode Voltage Regulator ...



http://www.youtube.com/watch?v=TDPQ2bo0IpQ&hl=en

Nice little dimmer / SMALL AC motor speed control circuit for 120VAC. 4A MAXIMUM. I made this to be used as a temperature control for my 40W soldering iron. ...



http://www.youtube.com/watch?v=StZ_rLsidjA&hl=en

Regulating a constant current on led of 320ma ,capacitors can be stuck on in and output if you like which I'll do myself when I put a series string of leds t...



http://www.youtube.com/watch?v=_5CL0SRfGrk&hl=en

This is a description of a simple opamp circuit that will translate the variable resistance of a Flexi-Force sensor into an analog voltage and maintain linearity across the sensor's measurement range. www.tekscan.com www.national.com Your feedback and topic suggestions for future tutorials are welcome.



http://www.youtube.com/watch?v=VtxFtzWlTgg&hl=en

This shows the circuit diagram for the tiny motor/generator that I made and showed in the video on 8-25-11. I don't recommend this circuit because there are easier ways to accomplish the same thing. The setup for the motor was made using parts on hand. Instead of using four separate coils, just two coils wound properly could probably give the same results.



http://www.youtube.com/watch?v=t7XKXX3dPUk&hl=en

Really simple and effective DC voltage regulator circuit for an input of less than 40 VDC, and a desired output of 1.2 to 37 VDC. Current is 1 - 1.5A Max!



http://www.youtube.com/watch?v=srrQyn5fzJ0&hl=en

An explanation of how the circuit works for the dummy load and some tweaks to increase the constant current. --------------------- Click "Show more" ------------------------------- My website and forum:- www.mjlorton.com Donations and contributions www.mjlorton.com My techie channel MJLorton - Solar Power and Electronic Measurement Equipment - http My Techie Amazon Store: astore.amazon.com My other channel VBlogMag - For almost any topic under the sun! - www.youtube.com My VBlogMag Amazon Store: astore.amazon.com ----------------------------------------------------------------------- Link to Kibi's "Dave Jones' dummy load with added features" : mjlorton.com Dave Jones / EEVblog video: www.youtube.com WHAT IS AN OP-AMP?: talkingelectronics.com My components: * Infineon MOSFET N-channel 200V 13.5A TO-220 - BUZ31L H * Vishay 534 Series Pot with 6.34mm shaft, 50K * 2 x 10 k Ohm resistors * Arcol HS50 Al house wirewound high power resistor,1R (1 ohm) 50W - HS50 1R J * National Semiconductor Quad op amp,LM324N 1MHz DIP14 * How does an N Channel logic level MOSFET work - gate voltage, variable resistance, heat dissipation. * How does a LM324N Op Amp work - voltage follower, comparator, rail to rail, head room, feedback loop.



http://www.youtube.com/watch?v=hgrvJ2b2xfg&hl=en

DC Current PWM-Controller. Circuit Engineering. Pulse-width modulation is a method of voltage control that today is used quite extensively. PWM-signals are for the most part used to control motors and pulse power supply units. This purpose is served by a number of control circuits: transistors, special microcircuitry, digital signal processors. As a rule, a transistor, often a FET, is used to control the generated PWM-signal. Widely popular are the width-pulse circuits that control powerful field-effect transistors - MOSFETs. These transistors are capable of switching high current of up to 100A and above at the gate voltage of 12-15V. The on-state transistor resistance is very low, which decreases the dissipated power. Control circuits are supposed to provide for at least 12V-15V difference between the gate and the source. In some cases, PWM-controllers employ microchips with output voltage build-up of up to 25-30V at 8-14V supply voltage, which facilitates connection of the transistor in the circuit with the common drain. For the majority of loads with current consumption of below 10A the circuits do not have an additional voltage build-up unit. Let's look at an example of PWM-controller using a simple circuit based on the logical CMOS microchip inverters. The device is a square-wave generator based on two logical components, where the diodes separately change the electric charge time constant and the electric discharge time constant of the capacitor that sets the ...



http://www.youtube.com/watch?v=DWZYS4-09wo&hl=en

This video demonstrates PIR motion detector with a pir circuitry. This circuit is a home made. The circuit uses pir sensor which detects motion and amplifies the signal. relay is switched on when motion is detected,and switched off when no motion is detected. The voltage regulator used here are,7805 and 7812 ic . i had assembled this inside a switch board, and connected to the mains 250 volts. as you can see when the relay is on, and off, light is on, and off. When a motion is detected the relay is switched on. This circuit is always on when continous motion is detected. It waits for a while before switching off. again when it detects a motion it is switched on. this project was designed and developed entirely by Titoo . they consist entirely of content that titoo created himself.. completed in 5 days.



http://www.youtube.com/watch?v=k0g64fo5HP0&hl=en

Lecture Series on Electronics For Analog Signal Processing I by Prof.K.Radhakrishna Rao, Department of Electrical Engineering,IIT Madras. For more details on NPTEL visit nptel.iitm.ac.in



http://www.youtube.com/watch?v=nIF55Mu4v4M&hl=en

Test for the AC Time Delay circuit using Triacs electroschematics.com The C1 capacitor will charge up gradually through the R1 resistor until the voltage across the capacitor reaches the threshold voltage of the thyristor (Vc1=0.7V). The voltage across the capacitor, Vc1 at any instant in time during the charging period is given as: Vc1 = Vs[1 -- e^(-t/RC) ] Vs= the peak supply voltage If we use 230 Vac, the peak voltage is therefore 230* 1.41, which is about 325 V. Do the math and obtain 70ms time delay. Later the triac turn on for Vc2 = Vgt +Igt*R3 ~ 4V Second time delay ~ 270 ms In theory the total time delay = 70+270= 340ms In practice tested using BT139, TIC206M, TIC216M, TIC226M, BTA16. No succes for TIC226M, BTA16. Time delay for : BT139 ~ 3-4 s TIC206M ~0.3 s TIC216M ~ 0.5-0.6s We have measured the illumination on a work table for the 100W light bulb. Ambient illumination =70 lux, typical illumination for light bulb power supply direct connection =1100 lux. Using BT139 ~300 lux TIC206 ~ 1100 lux TIC216M ~450 lux



http://www.youtube.com/watch?v=mXZs3UsmQ6Q&hl=en

www.FreedomUniversity.TV. The video shows how to analyze an operational (op amp) circuit configured as a buffer or voltage follower. The buffer is used to prevent loading between circuits. In other words, when connecting circuits together, you do not want to change the operational function for each circuit. If you have questions, please contact Professor John Santiago at john@e-liteworks.com or visit the above website.



http://www.youtube.com/watch?v=vsko8-LXnSo&hl=en

This is a video detailing one of the processes I use to design, create, and etch circuit boards (PCBs)



http://www.youtube.com/watch?v=NAi_yFMqc10&hl=en

www.docstoc.com here is stan meyers circuit for making HHO.... basic circuit.....he used this as his display. electrical resonance needs to be between the inductor and the cell.....voltage will go up.... just like meyer said. FREE ..................... SAVE OUR PLANET........ NOW........... i could not resist posting this. others want to hide it...... others have no idea how to read it....... others think you will give them money , just because they have it...... the multi billion dollar secret.............FREE now the world has it.............what will you do with it?



http://www.youtube.com/watch?v=X5-WO5s0J98&hl=en

This is one of the first circuits in the EE223 Introduction to Digital and Analogue electronics module at Dublin City University. This circuit is required for most of the following experiments. This video is continued to a mains powered version at: www.youtube.com The associated materials for this module are at: www.eeng.dcu.ie



http://www.youtube.com/watch?v=howQ05z4v7Q&hl=en

www.FreedomUniversity.TV Here, the basic laws of circuit analysis is discussed in terms of connection constraints to find the unknown voltages and currents in a circuit. For more videos on this topic or others, please contact Professor Santiago at john@e-liteworks.com or visit the above URL.



http://www.youtube.com/watch?v=m4Iji5QRngE&hl=en

Read Here: I have several previous videos that lead up to this video about simple and cheap laser communication. The system up to this point shown in the video works great for transmitting audio/sound/music via a laser beam. Give your friends a reciever to put in their window and you can transmit some audio to them, as long as they are within range, line of sight and/or mirrors can "bend" the laser beam. Unlike other methods of communication, no transmission wires, license or other hassles come with this method. Disclaimer: There is no need to look into the direct laser beam since it can damage your eyes or someone elses. Still, if complete sound input isolation is needed from the laser communicator circuit, you can try a 1 to 1 transformer, or two 8 to 1000 ohm ones connected together to where the primary is 8 ohms and the final secondary is 8 ohms. If you cant find or contruct a 50K fixed resistor, you can just use a more common 47K resistor. I think it's better to have some adjustability to Rb for various reasons. So then, perhaps a 50K variable in series with say 33K (to prevent your pot from getting dammaged, etc) or something. The next step is to transmit and successfully receive digital computer data with the laser communicator system. I will try the KCS (Kansas City Standard) scheme, but there are others, and I'm not sure what would work the best, assuming at least one method will work though. The clothespin attached to the laser is to apply pressure like a clamp ...



http://www.youtube.com/watch?v=9QKgSeiBwdU&hl=en

This video continues from a previous video on setting up a simple battery power supply on a breadboard. This video uses a mains transformer 9V Power Supply Unit (PSU) that allows us to power circuits without the need of a battery. However, the supply is noisy and could lead to difficulties. A diode is added to protect the circuit from reverse connections. A switch is added to simplify usage. A PTC (Positive Temperature Coefficient) Transducer is added to protect the circuit from short connections and Capacitors are added to smooth the supply. We use the oscilloscope to examine the quality of the output supply.



http://www.youtube.com/watch?v=FVMrA8C-GM0&hl=en

Here's my DC output voltage reading from my bridge rectifier circuit.



http://www.youtube.com/watch?v=oGRKW-qHQ5M&hl=en

Cadsoft Eagle PCB Tutorial 5 volt 100ma regulator circuit diagram layout.



http://www.youtube.com/watch?v=oAcyNbJOxwM&hl=en