Mutchus

This is a high quality power supply with a continuously variable stabilised output adjustable at any value between 0 and 30VDC. The circuit also incorporates an electronic output current limiter that effectively controls the output current from a few milliamperes (2 mA) to the maximum output of three amperes that the circuit can deliver. This feature makes this power supply indispensable in the experimenters laboratory as it is possible to limit the current to the typical maximum that a circuit under test may require, and power it up then, without any fear that it may be damaged if something goes wrong. There is also a visual indication that the current limiter is in operation so that you can see at a glance that your circuit is exceeding or not its preset limits.    Technical Specifications - Characteristics Input Voltage: ................ 24 VAC Input Current: ................ 3 A (max) Output Voltage: ............. 0-30 V adjustable Output Current: ............. 2 mA...

3 Tone Siren project produces Gun Sound, Police Siren and Ambulance Siren effects from a speaker. This project is built around UM3561 IC driving an LM386 audio amplifier to give that extra punch. [ ]

This amplifier circuit using ic BA534 as a main amplifier, manufactured by ROHM ic, and packaged in SIP1-8. This amplifier circuit has a maximum output of 2.3 Watts with 4 Ohm impedance. Frequency response is between 30Hz to 18KHz. For the voltage needed at least 9 Volt and 13 Volt maximum. For a list of components can be seen below. Part List : R1 = 50K trim R2 = 33K R3 = 68R C1 = 2.2uF C2 = 220uF C3 = 100uF C4 = 47uF C5 = 470uF C6 = 100uF C7 = 47uF C8 = 100n U1 = BA534

Before we explain the last part, we want to warn you that it’s obligatory to put on a mask and a pair of gloves to work with acids. We’ll use 110 volumes oxygenated concentrated water and hydrochloric acid solution.  First one can be found in pharmacies and the second one in the shops of cleaning products. We also need a test tube to make an exact measurement, and a plastic container where we’ll put a glass fiber immersed in acid. The mixture will be: one part of the 110 volume oxygenized water, one part of a hydrochloric acid solution and a one part and a half of tap water. To help you imagine the quantity, for this board (20x6 cm9 we have used 50 cc of oxygenated water, 50 cc of hydrochloric acid solution and 75 cc of tap water. Once we make a mixture, we continue to immerse our board in acid. Carefully, you should always wear a mask and do this in a ventilated room, or even outside. The vapour that comes out is very toxic. We rock gently the recipient (left and right) s...

This Dc power converter circuit is designed LTC3601 from Linear Technology and is capable to up to 1.5A output current at a 3.3V. The LTC3601 operating supply voltage range is from 4V to 15V making it suitable for a wide range of power supply applications. The operating frequency of the LTC3601 buck regulator is programmable from 800kHz to 4MHz with an external resistor enabling the use of small surface mount inductors. Using LTC3601 3.3V DC Power Converter  Circuit Diagram The LTC3601 buck regulator can operate in two modes: Burst Mode operation and forced continuous mode to allow the user to optimize output voltage ripple, noise, and light load efficiency for a given application.

This constant current circuit is designed to drive two 3-watt Luxeon LEDs. The LEDs require 1,000mA (1Amp) and have a characteristic voltage-drop across them of about 3.8v. Approximately 4v is dropped across the LM317T regulator and 1.25v across the current-limiting resistors, so the input voltage (supply) has to be 12.85v. A 12v battery generally delivers 12.6v. The LM 317T 3-terminal regulator will need to be heatsinked. This circuit is designed for the LM series of regulator as they have a voltage differential of 1.25v between "adj" and "out" terminals.