Mutchus

The PIC32MX250F128B has a myriad of peripheral features that makes this cheap little 28-pin 32-bit microcontroller extremely powerful. However, it does lack a digital-to-analog converter (DAC). A simple approach to digital-to-analog conversion is to use one of the PWM channels and then to use an RC low-pass filter at the output. However, there is another neat little feature of the device that can be exploited or rather utilized to obtain a rather crude DAC – the analog comparator module. Rather, the analog comparator reference module. The PIC32MX250F128B contains an internal voltage reference module that was created to be used as a reference voltage for the internal analog comparator module. However, it does allow you to output this reference voltage to an output pin. Analog voltage output with digital control? Sounds like a DAC. The voltage reference module is built off of a 16-tap resistor ladder network with two selectable ranges – from 0 to 0.67 CVREF or from 0.25 to 0.75 CVREF. CV...

Well hello everyone. Today we’re going to talk about cigar box guitars (CBGs). For a while now, I’ve been noticing more and more references to CBGs creeping into popular websites, including one of my favourites, boing-boing.net. Here are a couple of recent articles from there: http://boingboing.net/2012/04/13/cigar-box-guitars-book-photo-g.html http://boingboing.net/2012/02/14/grand-re-opening-of-the-cigar.html It was my birthday last month and my friend Mike bought me a copy of “Cigar Box Guitars” by David Sutton. It’s a great book that explains not only how to make four different cigar box guitars, step by step, but also interviews some very interesting characters involved in the cigar box guitar scene. I decided to have a go at making one of the CBGs described in the book, and that’s what this post is about. Firstly I got my hands on a Cigar box, graciously donated by another very good friend of mine (thanks, Kevin). I searched around for a while for suitable scrap wood for the n...

Chinese "master leaks"OnLeaks today released new photos and informal information about the upcoming Android-smartphone Samsung Galaxy S6 Edge Plus. According to the source, the future new South Korean manufacturer will have a screen diagonal of 5.5 inches with the dimensions of 154.45? 75.80? 6.85 mm. Earlier, there were rumors that the Galaxy S6 Edge Plus get hooked screen with a resolution of 1440x2560 pixels, 64-bit 6-core Snapdragon 808 processor series from Qualcomm Adreno 418 graphics, 3GB of RAM and 32GB ROM, port USB Type C and two cameras - front and 5MP primary 16Mp. Preview Galaxy S6 Plus along with Galaxy Note 5 can be held in September at the exhibition IFA 2015.

How to Build a Thermo-Fan To Keep Your Amp Cool Circuit Diagram In many areas of the world, keeping an amplifier cool is no big deal, because of generally low average temperatures.  Thermo-Fan To Keep Your Amp Cool Circuit Diagram

A 4-Digit Keypad Controller Switch Circuit This is a universal version of the Four-Digit Alarm Keypad . I have modified the design to free up the relay contacts. This allows the circuit to operate as a general-purpose switch. It also means that it can be used to control all of my Alarm Circuits. I've used a SPCO/SPDT relay - but you can use a multi-pole relay if you wish. The relay is energized by pressing a single key. Choose the key you want to use - and connect it to terminal "E". Choose the four keys you want to use to de-energize the relay - and connect them to "A B C & D". Wire the common to R1 and all the remaining keys to "F". The Circuit is easy to use. When you press "E" - current through D2 & R9 turns Q6 on - and energizes the relay. The two transistors - Q5 & Q6 - form a "Complementary Latch". So - when you release the key - the relay will remain energized. To de-energize the relay - you need to press keys ...

This circuit LED reproduces the first LED sequence at this time used by FISA on behalf of Formula single racing. It may perhaps be alive used with slot car sets (such for example HO shin up AFX/Life Like/Tyco sets) or else means of communication controlled cars. IC1, a 555 timer IC, is used as a watch pulse generator. Its output is fed via NAND gates IC2a and IC2c to IC3, a 4024 binary counter. IC2b inverts the O4 output of 4024 binary counter IC3. originally, IC3 is reset and all its outputs are low, together with O4, which causes IC2b to present-day a rational climax to the pin 8 input of IC2c which after that passes pulses from the 555 timer circuit to the clock input of the 4024. IC3 then begins together with. LED Circuit with Timer 555 Circuit Diagram Following the count has reached binary 1111, the subsequently pulse sends the O4 output of IC3 high, which disables IC2c and IC3 stops with. The four used outputs of IC3 are connected to a resistor ‘ladder’ which acts to the same deg...

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 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...

Using electronic diagram below can be made a voltage converter that allows laps positive voltage of existing power sources, or convert it into a negative voltage. New supply is electrically isolated from the source through the ferrite transformer wound on a torus G2-3FT12. Primary winding consists of 30 turns. Number of turns in the secondary, n, is calculated using the equation: n = 30 Uo / Ui, where Uo is the desired voltage and Ui is the input voltage. Add to compensate pieriderior 20.05.10 turns. If the output voltage is higher, it can always reduce Pi. Both coil windings can be enamelled copper wire with a diameter of 0.3 mm.  Low Power Variable Voltage Converter Circuit Diagram: The transformer is controlled by a gate CMOS Schmitt trigger and Do with transformed into a rectangular signal generator R1 and C1. Additional current to charge C1 is provided by R2 and Pi, which controls the duty cycle of the rectangular signal. The signal frequency is about 220 kHz and fill factor o...

In most cases where you want to control an AC load, a triac or SCRs will be used. However, it is not easy to drive a triac or SCR. The drive requirement for the triac or SCR makes it sometimes difficult to control it as we want. One thing is that we can not turn the triac or SCR on or off as we desire, because once we turn it on, it latches and stays on until the next zero crossing or until current stops flowing through it. Also, driving a triac with reference to MT1 (or A1) is not as straightforward as we would want. However, a MOSFET can be controlled as we want. Set the gate high (with a sufficient voltage) and current can flow from drain to source. Set the gate low and current can no longer flow. Convenient! However, a MOSFET can only be used to control DC loads since it is a unidirectional switch - current flow can be controlled when it is flowing from drain to source, but can not be controlled from source to drain. So, certainly it can not be used to control AC loads. Right? Well...

Build a Simple Digital Electronic Lock Circuit Diagram . This is a Build a Simple Digital Electronic Lock Circuit Diagram . The digital lock shown below uses 4 common logic ICs to allow controlling a relay by entering a 4 digit number on a keypad. The first 4 outputs from the CD4017 decade counter (pins 3,2,4,7) are gated together with 4 digits from a keypad so that as the keys are depressed in the correct order, the counter will advance. Simple Digital Electronic Lock Circuit Diagram As each correct key is pressed, a low level appears at the output of the dual NAND gate producing a high level at the output of the 8 input NAND at pin 13. The momentary high level from pin 13 activates a one shot circuit which applies an approximate 80 millisecond positive going pulse to the clock line (pin 14) of the decade counter which advances it one count on the rising edge. A second monostable, one shot circuit is used to generate an approximate 40 millisecond positive going pulse which is applied...

Single Ended Valve Triode Amplifier has not same tone with Push Psu Amplifier. Over 90% of Amplifiers are push pull, and push pull amplifier does not 2nd harmonic and off course does not get 2nd 4th, 6th harmonic vs SE has 2nd, 4th, 6th harmonic. Push pull has minor distortion than SE Amplifier.2nd harmonic is make good tone for Music.not too much and not less than.feel good sound get from Single Ended Amplifiers with high efficiency speakers from 88dB/m to 100dB/m. I means Single Ended Amplifier is almost Single Ended Triode Amplifier.or Penthode but wired Triode. Tone is Different.good for Jazz and small room Classic.   KT88 Tube Power Amplifier Class A Circuit

This is the simple 10 to 14W Class A Audio Amplifier Circuit Diagram. I have built this amplifier and it does sound good. It requires a preamp as it hasn't got much gain. It requires big heat sinks and a large transformer and a great power supply and careful wiring, but in the end it is xtremely simple and it sounds very good. The zener diode rejects any ripple coming from the power supply, But you still only want a ripple of 10mV max. The ripple reaching the input is amplified, so the zener diode gets rid of that, but whatever ripple there is will still reach the power stage.  10 to 14W Class A Audio Amplifier Circuit Diagram

Japanese company Toshiba introduced the drive Canvio AeroCast, which is a line of wireless devices for data storage, while keeping an impressive capacity of 1TB and supports up to six devices simultaneously. The technology, according to the manufacturer, is able to work on a single battery charge up to 5 hours of active streaming content. For convenience, copy photos from your mobile device or camera novelty is equipped with a socket for SD memory card Wireless drive Canvio AeroCast debut in Russia in 2015 at an estimated cost 7050 rubles. Canvio AeroCast supports a Wi-Fi network and creates its own network WLAN, allowing remote access to files stored on the drive from mobile devices and perform backups without wires or connect to the Internet. Content with Canvio AeroCast also be broadcast on the TV screen: it is necessary to install an application that is compatible with Google Cast. Specifications Toshiba Canvio AeroCast: Capacity: 1 TB Interface: USB 3.0 Tuxera NTFS driver for Mac ...

If you have an application in which a MOSFET is already used to switch a load, it is relatively easy to add short-circuit or overload protection. Here we make use of the internal resistance R DS(ON), which produces a voltage drop that depends on the amount of current flowing through the MOSFET. The voltage across the internal resistance can be sensed using simple comparator or even a transistor, which switches on at a voltage of around 0.5 V. You can thus avoid the use of a sense resistor (shunt), which usually produces an undesirable extra voltage drop. Short-Circuit Protection Circuit Diagram The comparator can be monitored by a microcontroller. In case of an overload, the software can initiate suitable countermeasures (PWM regulation, alarm, emergency stop etc.). It is also conceivable to connect the comparator out-put directly to the gate of the MOSFET, in order to immediately cut off the transistor in case of a short circuit.

Single Ended Class A power Amplifier with Resistor load The below fig shows a simple series-fed class A amplifier with resistive load R C . The transistor used here is under fixed biasing condition. As the input signal is applied, the transistor operates in active-region and hence the amplified power output appears across the load resistor. The static output characteristics along with input, output waveforms are shown in the below Pic 2.                                                                    Pic 1  Series Fed Class A Amplifier                                                     Pic 2 Input and Output Characteristics of a Series Fed Amplifier For the purpose of analysis, we as...