EPC2LC20 Configuration Device

The EPC2LC20 is a Configuration Device which is designed for SRAM-Based LUT Devices.

EPC2LC20 absolute maximum ratings: (1)Supply voltage: -0.2 to 7.0 V With respect to ground; (2)DC input voltage: -0.2 to 7.0 V With respect to ground; (3)DC VCC or ground current: 50 mA; (4)DC output current, per pin: -25 to 25 mA; (5)Power dissipation: 250 mW; (6)Storage temperature: -65 to 150℃; (7)Ambient temperature: -65 to 135℃; (8)Junction temperature: 135℃.

EPC2LC20 features: (1)Serial device family for configuring APEXTM II, APEX 20K (including APEX 20K, APEX 20KC, and APEX 20KE), MercuryTM, ACEXR 1K, and FLEXR (FLEX 6000, FLEX 10KE, and FLEX 10KA) devices; (2)Easy-to-use 4-pin interface to APEX II, APEX 20K, Mercury, ACEX, and FLEX devices; (3)Low current during configuration and near-zero standby current; (4)5.0-V and 3.3-V operation; (5)Software design support with the AlteraR QuartusR II and; (6)MAX+PLUSR II development systems for Windows-based PCs as well as Sun SPARCstation, and HP 9000 Series 700/800.

Simple Switch Step Down Regulator Circuit LM2596

The LM2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 3A load with excellent line and load regulation.
These devices are available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation†, and a fixed-frequency oscillator.

The LM2596 series operates at a switching frequency of 150 kHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Available in a standard 5-lead TO-220 package with several different lead bend options, and a 5-lead TO-263 surface mount package.

A standard series of inductors are available from several different manufacturers optimized for use with the LM2596 series. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a guaranteed ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 80 µA standby current. Self protection features include a two stage frequency reducing current limit for the output switch and an over temperature shutdown for complete protection under fault conditions.

PC817 High Density Mounting Type Photocoupler

An optical isolator is known as a device which enables transmission of an electric signal by making use of the signals induced by light. The theory behind this is that coupling needs to be done between the insulation of input and output of a circuit board or a single wire which makes use of these principles. The basic purpose of any kind of optical isolator or a photo coupler is to make sure that any high changing voltages do not damage the components. This is done via carefully designed and manufactured photo couplers which are sold by a couple of different electronics manufacturers out there. Most known manufacturer of photo couplers is Sharp. If you’re interested in upgrading your circuitry with a device like this, you will need to do some proper researching first. Since this is a component which is intended to protect your devices, it’s important to know exact specifications of the photo coupler you’re looking for. Fortunately, this is no problem since there are plenty of datasheets specific to PC817 photo couplers which you can get for free online and get all the information you need. For starters, you can visit HQEW.net ’s official website where you might find some decent information on how can you order their products, but it’s more important for you to test your circuits first to know what numbers need to be matched and to what extent. Tolerances are very important here and this research will help you save cost on future purchases.

What is an FM transmitter?

An Fm transmitter is a circuit/device to transmit audio signals to an fm radio receiver through air (wirelessly). The input (audio)to an fm transmitter can be fed using a microphone or the output of your music player to be transmitted, and the signal which you transmit can be received using an FM radio, the advantages of FM TRANSMITTERS ARE many:

1.You may transmit audio to another room/floor of your house without using any wires!

2.You may transmit your own voice if you used an electret microphone in the circuit

3.You don’t need to build a receiver to receive the ransmitting audio as any standard fm radio can be used to receive your voice/audio and many..!

building the circuit
this circuit can transmit audio to a distance of around 50 meters if you used 2n3904 transistor and boost the supply voltage to 6V, and 1Km(1 kilometer) if used S8050 transistor with 9V supply!

Possible To Achieve 1kw With UC3842 ?

Is that possible to achieve 1kw with UC3842 ?

The answer is "Yes",  you could get 1KW out of this circuit with the following conditions met:
1) The switching FET needs to be a pretty big device (like an IRFP460) with very good heatsinking
2) The switching transformer needs to be pretty serious (like an ETD49), well designed, and close to the PCB
3) You need to add an R-C filter that includes a steering diode (see other flyback SMPS's for an idea how to implement)
4) The 300V supply needs to be quite robust (are you going to use PFC?)
5) Make sure the switching frequency is not too high to have copper losses impact the power level (like maybe 25 to 50KHz)

The small transformer you have a question-mark over looks to be a feedback and Vsupply source. During normal operation, the power FET's switching is coupled through the 22nF/250VAC cap and the transformer generates two voltages - one to supply Vcc, pin 7, of the 3842 IC and the other voltage as feedback to pin 2. It looks like the current sense is set to about 4.5A (1V/0.22ohm Source resistor), so with 300V in, you're at about 1.3KW - on target with your goal.

This looks like a great project to experiment with!