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PORTLAND, Ore. — Scientists have demonstrated a doubling of the number of electrons produced by carbon-based photovoltaic polymer potentially doubling the efficiency of any solar cell. The process called “singlet fission” produces “identical twin” electrons from a single photon, instead of the normal one, dramatically boosting the theoretical maximum output of solar cells. Instead of loosing energy to heat, an extra electron is produced by the process of applying a polymer solution to an existing solar cell. “One of the challenges in improving the efficiency of solar cells is that a portion of the absorbed light energy is lost as heat,” lead scientist at Brookhaven National Labs, Matt Sfeir, told EE Times. “In singlet fission, one absorbed unit of light results in two units of electricity via a multiplication process rather than resulting in one unit of electricity and heat as would occur in a conventional cell.” [ ]

This is simple and Low-cost Electronic Circuit Project of Multiple Output DC Converter Circuit Diagram . A DC converter circuit taking one single DC input and converting to parallel multiple DC outputs. Simple But Multiple Output DC Converter Circuit Diagram: Circuit Project Notes : This circuit uses a single DC input (nominally 12 Volt) and converts to four simultaneous output voltages of 9, 6, 5 and 1.5 Volts. The output voltages are controlled by common 78xx series regulators, offering 9, 6 and 5 Volt DC outputs. The 1.5 Volt supply is derived using an LM317 regulator. To reduce power and heat the LM317 is fed from the 5 Volt regulator output. The LM317 output is calculated from: Vo = 1.25 (1 + R1/R2) With R1 200 ohms (use 180 plus 22 ohm in series) this works out to be 1.5 Volt. F2,3,4,5 are the output fuses and are set at 500 mA (0.5 A). If the full 500mA is taken from each output then the DC input supply must be capable of sourcing at least 2 Amp. LED 1 illuminates to show the ci...

This is the Simple Rf Output Indicator Circuit Diagram. In this electronic circuit A simple RF detector circuit using a visual indicator can be useful for an RF output indicator, etc. This circuit was used for a transmitter ON indicator. Simple Rf Output Indicator Circuit Diagram 

This amplifier circuit uses the output transformer as an additional amplifier in the output. You can use the transformer output transformer-old has not used but still in good condition, you can use it in this series. For this amplifier IC used is M51503L, this ic has a voltage limit of up to 7 volts only and a minimum of the incoming voltage about 2 volts. Actual output issued from the IC is 0.2 Watts, but once applied to the circuit maximum output of about 5.3 Watts. Part List : Resistor R1 = 75R R2 = 330R Capacitor C1 = 1uF C2 = 47uF C3 = 100uF C4 = 0.33uF C5 = 0.47uF Transformer T1 = Transformer Output OT240 IC IC1 = M51503L

There are some applications, such as double-ended sensors and audio amplifiers that require a negative voltage for operation. With limited space on today’s system boards, creating a dedicated negative supply rail would add to the cost and space of the PCB. Hence, it makes sense to generate the required negative voltage from existing positive supply rails in the system. One such solution using a traditional synchronous step-down regulator is provided by Texas Instruments in an application note entitled “Creating an Inverting Power Supply Using a Synchronous Step-Down Regulator”1. It shows you how to generate a negative voltage from a positive input voltage to the synchronous buck regulator.