Thursday, September 30, 2010

Charging Bike

Our project is a pedal-powered charger for portable electronic devices. The torque applied by a rider to the pedals is used to turn an electric generator. The generator is attached to a voltage regulator circuit that provides a 12-volt car cigarette lighter adapter and a 5-volt USB interface to connect your portable electronics. A series of capacitors are used to temporarily store the excess energy generated by the cyclist for later recharging.



http://www.youtube.com/watch?v=qV9Zy8-Uy1Y&hl=en

Wednesday, September 29, 2010

This is a 5x5x5 led cube with blue diffuse leds. It currently has 14 different led patterns which are all selectable with a switch on the back of the cube. When pressing for 2 seconds, the led cube is in random mode. It will show a new random led pattern each 30 seconds. The led cube can be connect with an adapter with minimum 9V and 500mA. The led cube has an internal voltage regulator providing 5V. There is also an 6-pins header which can be used to In-System Program the ATmega32. Important components: ATmega32 125 diffuse leds 25 BC547 transistors 5 BC337 transistors LM7805 voltage regulator resistors capacitors



http://www.youtube.com/watch?v=EDOnH13_94Y&hl=en

Tuesday, September 28, 2010

Lecture Series on Electronics For Analog Signal Processing part-II 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=fD7Nsybiur0&hl=en

Monday, September 27, 2010

The Storm Patrol is building a UAV this is one of many videos that document the build. In this video i show you the voltage regulator circuit for the 2.4GHz wireless video camera. This is based on the LM317 regulator 2 resistors and 2 capacitors. Check out www.thestormpatrol.com for updates.



http://www.youtube.com/watch?v=3n3JV8hTZ4c&hl=en

Saturday, September 25, 2010

4 leds, light up one after another, from left to right, one at a time. Components used: external power supply connected to 5V voltage regulator IC "7805", "555" timer IC, stadart logic IC's -- "74253" (8 D-type flip-flops), "7408" (AND gate) and "7404" (NOT gate), 5 leds (one is connected directly to the timers output, to make the clock signal visible), a few resistors and capacitors.



http://www.youtube.com/watch?v=-pS0JrSZ1JI&hl=en

Friday, September 24, 2010

Here Erik van Lent is testing the voltage regulator of my new VFR800 (which was broken)



http://www.youtube.com/watch?v=-L-_QNLJU0I&hl=en

Thursday, September 23, 2010

*** PLEASE READ: This is another way to measure the value of a capacitor. I have a beter method in another video, but this is one often mentioned due to that a signal generator (ie sine wave frequency) is not needed. For safety, discharge any capacitor before working with it. Use some resistance (lower than the resistance of air) value across its terminals. Some capacitors are "polarized" and can only be charged with the positive voltage connected to the (+) terminal, and the negative voltage connected to the (-) terminal, otherwise it will probably explode. This method here will work good for higher value capacitors, say 500uF up and up. Choose a resistor so that the capacitor can discharge reasonably slow, for greater accuracy in the results, hence a larger resistor, perhaps 1K to 10K. The smaller the capacitor being measured, the greater the resistance needed so that you can visually see the voltage levels and for accuracy since a small capacitor discharges very rapidly. The problem then will be that that the internal resistance of the meter starts to have greater effect on the overall (ie parallel) resistance in the test circuit. Here is a stopwatch timer on this webpage: www.online-stopwatch.com A good capacitor will hold its voltage for quite a time. A bad one has "leakage" (or current flow) through the dielectric material seperating the plates of the capacitor. It is possible to refurbish a capacitor a bit using a "voltage treatment"... bring the voltage up across ...



http://www.youtube.com/watch?v=s2iHsOldkbc&hl=en

Wednesday, September 22, 2010

Lecture Series on Analog ICs by Prof. K.Radhakrishna Rao , Department of Electrical Engineering,IITMadras. For more details on NPTEL visit nptel.iitm.ac.in



http://www.youtube.com/watch?v=mB5nI_phvlQ&hl=en

Tuesday, September 21, 2010

60 cub loboy startup after electrical tweaks, thanks WisconsinCubman and BigDog!



http://www.youtube.com/watch?v=KOLY4hyKCxI&hl=en

Monday, September 20, 2010

Part 1 of video 1 to our multi video tutorial on LCD TV repair. Our LCD TV Repair Guide can be found here, preher-tech.com .Visit our website www.preher-tech.com for electronics repair information. Email john@preher-tech.com with any electronics questions or comments you have.



http://www.youtube.com/watch?v=wMlF_P7zV3U&hl=en

Sunday, September 19, 2010

RED HIGH POWER LASER MODULE PRESENTATION CZERWONY LASER WYSOKIEJ MOCY - PREZENTACJA MODUŁU 658nm +/- 5nm LM317T - CHEAP DRIVER (220mA) LASER DO KUPIENIA NA ALLEGRO :) cena jaka mnie interesuje to 70zł razem z driverem i regulowanym kolimatorem przystosowanym do dużych mocy a nie tak jak reszta sprzedaje z soczewką która jest z pointera 5mW :)



http://www.youtube.com/watch?v=VCT7YWFyaO0&hl=en

Saturday, September 18, 2010

PWM Brightness Adjustment

This is a PWM (pulse width modulation) circuit board I made for a friend's CB 750 LED tail light retrofit. It uses a 555 timer and a Sharp 12V regulator. It will be used to power 40 Lumileds Superflux LEDs.



http://www.youtube.com/watch?v=6WilxvrVJMc&hl=en

Friday, September 17, 2010

Basic Voltage Regulator.

Beware. Do NOT short the output or load the output transistor too hard. It will blow up. Use a good heat sink. Transistors like MJE182 or MJE340 with gain over 50, are suitable.



http://www.youtube.com/watch?v=W19dXf3qsLU&hl=en

Thursday, September 16, 2010

Second video. This is a microcontroller driven led mod with low voltage alarm, for silverlit xtwin (super light rc airplanes). It is a work in progress. The item shown is crude lab prototype on a breadboard. probably only interesting to those who knows what it is. The ic to the left is a voltage regulator to drive the circuit. The ic to the right is a microcontroller, programmed to blink a white, red and green led in a certain pattern. The microcontroller also monitors the battery voltage and changes the blinking pattern if the voltage drops below a certain threshold. This way the pilot can be alerted in time and land safely before the battery dies. The state of this project is ready. The finished prototype can be seen below the breadboard, the small pcb with three wires coming from it.



http://www.youtube.com/watch?v=V2aCIBus02M&hl=en

Wednesday, September 15, 2010

THIS IS A TRANSISTOR VOLTAGE REGULATOR TEST WHICH SHOWS HOW A REGULATOR LIMITS THE VOLTAGE TO THE BATTERY BY CONTROLLING THE ROTOR OUTPUT.



http://www.youtube.com/watch?v=Go5zYIAxATk&hl=en

Tuesday, September 14, 2010

Testing my V-MATE 640x480 recorder. Took my foam Radio Controlled plane (Super Lightning), put a camera on board, and ran it through an Eagle Tree OSD with real time GPS! The flight is very quick as it was only to test the San Disk V-MATE record quality. I am powering it via a 11.4v steped down to 6v using a cheap ebay voltage regulator.



http://www.youtube.com/watch?v=r_qV1t0TBss&hl=en

Sunday, September 12, 2010

Micro-controller interfacing circuit contains power supply, 16F877A PIC, voltage regulator 7805, 10KΩ resistors for the input ports, 330Ω resistors for the output ports. Two transistors C5476 BJT NPN type were added -as a switch- to the drive circuit for the two drive systems to let the PIC activate the relay coil. PIC used for main drive system to control direction and position of the car automaticaly. For main drive system, PIC was programmed to have seven input ports and two out ports. The seven input ports were connected to four magnetic switches and three pushbuttons. The two output ports connected to the Bases of two BJTs in the drive circuit, one to move the car upward and the other to move the car downward. Before connecting the interfacing circuit to the input switches and the main motor, it had been tested on a laboratory breadboard and connected to a DC Wiper motor. The input switches were seven normally open switches connected on the breadboard. Hashemite Uni. - Mechatronics Dept. - Panorama Electrical Elevator Graduation Project 2008/2009. Done by: Ashraf Samir Al-Bitar: aushrufcouzin@hotmail.com Ahmad Sufain Abu-Asfar: ahmadaboasfar@yahoo.com Hazem Jamil Al-Hawajreh: hazemja@hotmail.com Supervised by Dr. Asma Al-Tamimi



http://www.youtube.com/watch?v=Nn2v14eEQ3s&hl=en

Saturday, September 11, 2010

Eagle Tutorial Lesson 3

Lesson 3 in my EagleCAD tutorial series. In this lesson we will start a schematic for a real working circuit. In this case, a voltage regulator, filter caps and an LED. We will cover some new tools, point out some quirks of Eagle and pitfalls to avoid.



http://www.youtube.com/watch?v=G0bMfV3IbMo&hl=en

Friday, September 10, 2010

This is a how to DIY video that will teach you to make a 5 volt flashlight Mod for the Joye 510 electronic cigarette. The mod I teach you how to make I call the "Detonator" iut is a consistant 5 volts. Every time you vape the 2 cr123a batteries give you exactly 5 volt because of the inline voltage regulator. Other e-cigarette mods deliver 6 volt or more then slowly drop off as you use the PV, every hit the batteries become weaker and weaker slowly giving a lesser satisfying hit during use. The Detonator operates consistantly at 5 volt for the entire life of the rechargable protected cr123a batteries. This Detonator in the video has a red LED lit when the power is On and a blinking green LED when the attomizer is being powered. I take you through the process of making a 5 volt Detonator step by step, so that you can make your own. For those that don't want to make there own I will make one for you- just contact me for details.



http://www.youtube.com/watch?v=iCwL0q8dknA&hl=en

Thursday, September 9, 2010

Wednesday, September 8, 2010

In the 3rd vid we show you how to prepare a mainboard for cooling and how to install a voltage regulater water block.



http://www.youtube.com/watch?v=3Mva1J_1WZA&hl=en

Tuesday, September 7, 2010

voltage regulator

Monday, September 6, 2010

So i made this 9v to 5 v regulator board, this is realy easy to build so you can probably do this at home! Parts used: 5V Voltage regulator, resistor(330ohm), red LED, usb female, some wire and a circuit board!



http://www.youtube.com/watch?v=oY3Tus3JviA&hl=en

Sunday, September 5, 2010

Hummer H2, 3 18" Mayhems 12000 watts, 4 BATCAP 4000, dual alternator set up with Missing link voltage regulator. Defiant Audio 1-302-335-5808 or 1-866-628-4087



http://www.youtube.com/watch?v=CBzAD4pdDIU&hl=en

Saturday, September 4, 2010

Friday, September 3, 2010

GPS-4303 Power Supply

Power supply units are intended to generate the output DC voltage and current with a wide correction range when using them in laboratory and industrial environment. They ensure operation in the mode of voltage stabilization or current stabilization with automatic switching after the load properties change.



http://www.youtube.com/watch?v=8dNEoQN9Rcg&hl=en

Thursday, September 2, 2010

This is the VVR Demo in a Gabriel Voxer 33. Just showing how it works. The clip is using just a video camera mic. The VVR lets the amp be able to be played at low volume to anywhere in between to full up.



http://www.youtube.com/watch?v=0Mta_unZSCo&hl=en