Mutchus

This is a dual-output switch mode power supply reference design based on the MAX17116. The part and reference circuit can provide both negative and positive supplies to AMOLED displays. [via]   The MAX17116 includes two current-mode 1.4MHz switch mode power-supply (SMPS) regulators for active-matrix organic light-emitting diode (AMOLED) displays. The positive supply is provided by a step-up regulator with a synchronous rectifier. The negative supply is provided by an inverting regulator with a synchronous rectifier.[ ]

This is a simple 10 Output LED Sequencer Circuit Diagram.This is a 10 output LED sequencer . After the last LED is illuminated, the circuit is reset. This circuit is build around readily available, low cost 10 Output LED Sequencer Circuit Diagram   Component a 555 and decade counter CD4O1 7. The timer IC NE555 is wired as an astable multivibrator that produces 6Hz clock at its output pin 3. The 4017 is a CMOS decade counter with 10 outputs. Inputs include a CLOCK (Pin 1 4), a RESET (Pin 15), and a CLOCK INHIBIT (Pin 13). The clock input connects to a Schmitt trigger for pulse shaping and allows slow clock rise and fall times (not needed in our case).  The counter advances one output at the rising edge of the clock signal if the CLOCK INHIBIT line is low. A high RESET signal resets the counter to the zero output. The circuit may be configured for counts less than 10 by connecting RESET to an output pin (one after the desired count). Thus, a five stage sequencer can be made by ...

This ia a Power Electronics Inverter Complementary Output Variable Frequency Project. This project is under:, power supplies, Inverters , complementary output variable frequency inverter . In this circuit U1 is a 4060 12-stage binary ripple counter that is used as a free-running oscillator; its frequency of oscillation is: 1/2.2 CIR2.   Complementary Output Variable Frequency inverter Circuit Diagram  The output of U1 is applied to U2, a 14-stage binary ripple counter that provides square-wave outputs of lfz, 1/4, `is, and `lls of the clock frequency. These signals are combined in U3 and U4 to provide a complementary drive for Q1 and Q2. Outputs from U3 and U4 are ac-coupled to Q1 and Q2 via C2 and C4, respectively. R3 and R4 adjust tbe gate drive to Q1 and Q2. Q1 and Q2 alternately draw current through opposing sides of the primary to synthesize an ac input voltage at a given frequency.  Only one side of the primary of T2 is driven at one time, so maximum power ou...

This is the Simple Relay Output Proximity Sensor Circuit Diagram. In This Circuit Ql is used as an oscillator around 300 kHz. R9 is set so that the oscillator just begins to run. An object ne ar the antenna will load the circuit down, and stop the oscillations. This is detected by buffer Q2, diodes Dl and D2, and this activates relay driver Q4, which operates the relay.   Simple Relay Output Proximity Sensor Circuit Diagram Sourced By: Circuitsstream

The circuit above get from -20 volt DC the rectifier diode which is fed to the collector of the Darling pn pass transistor , a TIP105 . The diode use IN4007. The base drive to the TIP105 is supplied through resistor R5. The base of the TIP105 is driven from Vz terminal at pin 9 , which is the anode of a 6.2 -V zener diode that connects to the emitter of the uA723 output control transistor. The method of providing the positive feedback required for foldback action is shown. This technique introduces positive feedback by increased current flow through resistor R1 and R2 under short circuit conditions. This forward biases the base emitter junction of the 2N2907 sensing transistor , which reduces base drive to the TIP105.

Improve Solar PV Panel Efficiency and Output Power There are a number of means available to increase solar panel output and efficiency — some of which may be utilized by the serious experimenter. These are listed as follows: Solar Cell Technology There are a number of technologies being researched and there are continual advancements. Experimental technologies and highest efficiencies include: Multi-cell gallium arsenide – 44% Single cell gallium arsenide – 29% Crystalline silicon - 25% Thin film copper-indium-gallium-selenide – 20% Emerging PV technologies (dye-sensitive cells etc.) – 11% (low efficiency, but very inexpensive) Check out this link for an informative solar cell research chart: http://upload.wikimedia.org/wikipedia/commons/7/71/PVeff%28rev121211%29.jpg Unfortunately, we live in the real world and the highest efficiency technologies are either unaffordable or have not been put into production. As a result, the experimenter is generally stuck with crystalline silicon techn...