LM317T Voltage Regulator with Pass Transistor

http://www.youtube.com/watch?v=KmWObZX0mzE&hl=en

The pin that would normally connect to the 3.3v output of the FTDI chip on the official Arduino boards actually connects to 5v on the 5v Sparkfun board! While this is more of a Sparkfun issue, theres another side effect, if theres a voltage difference between the FTDI chip and the regulator, it's quite possible for the regulator to cause harm to the FTDI, this, in my and my dads opinion really isn't a brilliant idea In the video you can see I cut the track between the 3.3v regulator and the 3v3 pin, this allows the system to run perfectly.



http://www.youtube.com/watch?v=AiBU8N4byLE&hl=en

progettazione realizzazione costruzione e collaudo di un alimentatore stabilizzato ceazione PECAFE



http://www.youtube.com/watch?v=6nNhT4G3-8I&hl=en

Tutorial 12: Corriente Alterna www.youtube.com Primero que nada disculparme por mi velocidad al hablar pero es que el límite de los 10 minutos de youtube no es fácil de cumplir. Por favor puntúen el vídeo y suscríbete si te gustan! Se me olvido mencionar que también se puede hacer sin un adaptador usando un transformador que tenga 20 Voltios de salida y soporte por lo menos 1,5 Amperios. Aquí les dejo el datasheet del LM317T de ST Microelectronics www.datasheetcatalog.org En este enlace tiene la misma fuente que les mostré que varía en pequeñas cosas pero esencialmente iguales: www.unicrom.com www.unicrom.com



http://www.youtube.com/watch?v=rSeS8WiQU1k&hl=en

This is the introduction of the "Trinity Screw Cell". Important Disclaimer!! This is a work in progress. I am still identifying issues and working out solutions. This is NOT the 'hey, I finally found the cure to all HHO problems' solution. ===== This is 3 Screw Cell cartridges wired in series. 12.5 VDC applied to entire assembly. Voltage drop of about 4.166 VDC across each cell. Total amps is currently about 7.5 after the cell pack had been warmed up for about 15 minutes. I am looking to increase the amperage to about 20 amps total draw. The intent of wiring 3 cells in series is an attempt to manage heat distribution more effectively without the use of a PWM or other current/voltage controller. Please note that I may go back to a parallel arrangement of these three or more cells once I have acquired some sort of Pulse Width Modulated (PWM) controller or other device to manage the current flowing within this circuit. This current configuration is set up for unrestricted brute force using only 12VDC automotive system as the voltage and current regulators without a PWM.



http://www.youtube.com/watch?v=1nbggHgm5Q8&hl=en

Red Laser Module from DX(it seems to be identical with aixiz module) - camparisson with the 5mw laser pointer diode. Asus DRW-2014l1t's 650nm - red diode open can type LM317T/DDL current regulating circuit driver - no capacitor, 3Ω(Ohms) regulating resistance.. 9V from 220V socket.. Max current of the circuit 390-395ma(miliamperes), voltage with max current 3.11V Optical power about 300-350mw(miliwatts) The diode is capable of about 600ma and up to 500mw Lits match instantly--



http://www.youtube.com/watch?v=aIBGqzM56CQ&hl=en

Ecco un laser da 300mw creato riciclando un masterizzatore DVD non funzionante, e l'ottica di una vecchia fotocamera da 35mm. Il driver usato è lm317t anch'esso recuperato da un vecchio gruppo di continuità ed assemblato su una nuova scheda. L'assorbimento è di 400ma. Here is a burning red LOC laser that was assembled entirely from recycled materials and a bit of ingenuity. The laser is from a now defunct DVD burner (LG 22x). The driver used is based on the LM317 IC. The lenses are from an old 35mm camera (non digital). The electronic parts were recycled from an old ups unit. The output is roughly 300mw with this glass lenses and the current is 380-400ma.



http://www.youtube.com/watch?v=8UQ1mPiZcjY&hl=en