My Light Diagram

LEDs IN SERIES LEDs can be placed in series providing some features are taken into account. The main item to include is a current-limiting resistor. A LED and resistor is called a string. A string can have 1, 2, 3 or more LEDs. Three things must be observed: 1. MAXIMUM CURRENT through each string = 25mA. 2. The CHARACTERISTIC VOLTAGE-DROP must be known so the correct number of LEDs are used in any string. 3. A DROPPER RESISTOR must be included for each string. The following diagrams show examples of 1-string, 2-strings and 3-strings: LEDs IN PARALLEL LEDs CANNOT be placed in parallel - until you read this: LEDs "generate" or "possess" or "create" a voltage across them called the CHARACTERISTIC VOLTAGE-DROP  (when they are correctly placed in a circuit). This voltage is generated by the type of crystal and is different for each colour as well as the "quality" of the LED (such as high-bright, ultra high-bright etc). This characteris...

 Nmos400 A power amplifier module capable of up to 400 watts into a 4 ohm load depending on power supply and the output mosfets used.  The layout makes use of older style TO3 mosfets. Nmos400-TO3 Schematic Nmos400-TO3 Layout Nmos350 Mk2 This revised version yet to be built improves a few perfomance areas. I considered more complex ideas but this increased the component count and original idea of the amp would have been lost; that is a powerful high quality amplifier that used commonly available and cheap components. A LED as the voltage reference for the first stage constant current source tracks changes in temperature slightly better that than the old double diode setup. A cascode second stage makes it faster and more linear. Better clipping attributes The fuse has been shifted out of the voltage drive loop between the driver and output stages. Nmos350 Mk2 Schematic