In the CD4094 data are synchronized on the rising edge and the LCD display will take on the falling edge shows us that this signal can be shared.

Well, then at the rising edge CD4094 transfers the data of the new byte out and fall on the side of the LCD display reads. Keep in mind that this method can not read LCD information display.

Now comes the hard part: How to separate text commands. LCD has a pin for this: RS pin. When this command for 0 accepted, as accepted in a text (ASCII characters). How do you solve this?

Before sending a character to initialize a timer on CD4094 500uSec. The resistor R1 will load capacitor C5. Then send the character to the CD4094 as quickly as possible. Thus, the capacitor simply does not have enough time to discharge. The LCD display will accept it as text. In order to command is the same, only in reverse. The capacitor has to be discharge.

Emitter follower T1 formed to protect the network R / C. The reason for this is that the LCD RS input is a TTL input signal and we put it to work quite well.

Program C Language

#include <hidef.h>
#include "derivative.h"

#define LINE1    0x80
#define LINE2    0xC0

#define DTASHT   0x01     // PTA0
#define CLKSHT   0x02     // PTA1
#define STBSHT   0x04     // PTA2

#define CTRL     1
#define DATA     0

void Shift(char, char);
void Delay(int);
void Write(char, char*);
void Init_Dsp(void);

void main(void) {

CONFIG1 = 0x01;
CONFIG2 = 0x00;

DDRA    = 0x07;
PTA     = 0x00;

Init_Dsp();

for(;;) {
Init_Dsp();
Write(LINE1,"  Hola Mundo    ");
}
}

//=====================================

void Init_Dsp(void) {
PTA |= CLKSHT;
Shift(CTRL,0x06);
Shift(CTRL,0x0E);
Shift(CTRL,0x38);
Shift(CTRL,0x80);
Shift(CTRL,0x0C);     // Cursor off
Shift(CTRL,0x01);     // Clear Display
}

void Write(char pos, char *text) {
Shift(CTRL,pos);
while(*text) Shift(DATA,*text++);
}

void Shift(char donde, char dato) {
int i;

for(i=0; i<8; i++){
if(dato & 0x80) PTA |=  DTASHT;
else            PTA &= ~DTASHT;

if(donde) {
PTA &= ~CLKSHT;
Delay(200);
PTA |=  CLKSHT;
}
else {
PTA &= ~CLKSHT;
PTA |=  CLKSHT;
}
dato <<= 1;
}
PTA |=  STBSHT;
PTA &= ~STBSHT;
if(donde) Delay(2000);
}

void Delay(int time) {
for(; time>0; time--);
}

Do you want to connect a traditional PC monitor on the VGA output of the MAC (Apple)? Yes you can. It is not the same connector, but this can be done with simple adaptation. No need to add the electronic components to this MAC VGA adapter. It’s just changing the connection between the cable and connectors.

The two connectors are D-Sub 15 points, but the next type of monitor is high density, with three rows of five points instead of two rows of eight and seven points for South-D 15 classic. Note that the vertical sync terminal is not used VertSync side monitor, only the horizontal sync HorzSync terminal is used. The latter receives the composite sync C. Sync from the MAC. The rest of the wiring does nothing special: the three terminals of the component video RGB (Red-Green-Blue, RGB for Red-Green-Blue) are in direct correspondence with their respective mass. Don’t know what the limits are Idx.

• The device is connected to the mains (230V in general) power button allows oscilloscope to turn on, which makes the lights on. (4).
• After a while, there are the spot of light on the display device (sufficient time to emitting cathode heated to a certain temperature and that there is emission of electrons).
• If after a few seconds, the point is still not visible, use horizontal alignment and vertical alignment as shown. (10, 11)
• Using the concentration (or focus) (acting on the anode concentration) brightness (which works on the accelerator anode) controls the sharpness of the spot. (5 and 6)
• The point should not stay too long concentrated at one point: this will end the damage to phosphor screen, with the knob adjust the time base (or sweep time) (9) (which works on the horizontal deflection plates), printed on-site more or less rapidly: at low speeds, we see a spot to move on the screen, if the scanning speed increases, we can see the solid line called the traces.

Viewing the voltage

• Select an entry (called channels) or B (1 and 2)
• Choose direct coupling (coupling ( switch position)
• Set the sensitivity in V / cm or mV / cm on the selected channel, depending on the voltage display. (7 and
• Set the circuit by connecting the instrument ground.
•  Set the time base so that it appears on the screen, the number of periods desired. (9)
• If the curve is not stable, adjust the time by working on the Level “button trigger.
• Perform the setting horizontal alignment and vertical alignment.

Featuring two voltages

The units have a two probe input channel YA and YB: they allow you to see the two voltages.

• Select the two-way “A and B”
• Select the sensitivity (7) and (8) in accordance with the voltage to display.
• Make connections to the oscilloscope.
• The mass is common in cases where it is located between the two terminals which have dipoles will see the voltages, it is necessary to reverse the voltage YB acting on the button “B +”.

Based on the book “Gather yourself” no. 2, 2004.

Synthesizer assembly
Before assembling the board review the recommendations that are given at the beginning of this book. To avoid failure, try to observe generally accepted rules of assembly. List of components within the set of NM5101, presented below :

Parts List of NM5101 set

In accordance with Fig. 3 install and weld components on the board. DA1 chip is installed in accordance with Fig. 4 ( Synthesizer lighting effects part 3 ).
After installation check the quality of the ration and proper installation elements. Recheck charge for lack of short-circuits and breaks tracks.

This device would be interesting for students: introduction to the basics of electronics, allowing you to experience the assembly and adjustment of modern electronic devices. Synthesizer will be used for fan of light effects as a festive illumination, or a tutorial on microprocessor technology and programming.
This device requires a voltage 9-25V and current around 50mA.

Description of this Synthesizer

Fig. 1 and Fig. 2 on the Synthesizer lighting effects part 2 shows the assembly of synthesizer boards and electric circuit.

Synthesizer is based on a microcontroller from Atmel (DD1). Power supply of the microcontroller obtained from the IC regulator DA1.
Elements of CI, C2, ZQ1 set the operating frequency of the internal oscillator of the microcontroller. Resistors R1 … R6, R8 – used for current limiting. SW1 button is a consistent choice of animated images. The basic version of the proposed microcontroller 12 stitched images.

DC to DC converter circuit is an electronic circuit which can be used either to transform one voltage to different level/value; or to provide an isolation barrier for a voltage bus. DC to DC converters are typically being used in power distribution system to provide a local voltage conversion, point of load voltage regulation or power bus isolation.

Download the document of: Theory of Operation for DC/DC converter
» Download Link

My own specifications for my prototype are X= 36cm, Y= 5.5cm. This imparted a quite high pitch tone but I prefer it.

The X and Y dimensions should be played with to generate the exact tone your seeking, also I chose a telephone speaker along with a crystal mic so I got the funkiest tone I could think of. A dynamic mic would limit the treble somewhat most likely make it sound less harsh. I’d be thinking about any mods made to this design (ie. stories, suggestions, etc.) so really feel free to e mail me.

The amps could be any old common op-amp construction that could drive a speaker or take a microphone input.I just made use of some surplus material I’d lying around to build mine. The finished object had all the circuitry inside the tube and the power supply on the outside, with one control for the gain of the speaker (microphone was at fixed gain).

Note, if you locate this in front of the amplifier and turn every thing up, without adding any dampening towards the pipe, it is going to feedback just like you won’t imagine! You’ll most likely wish to avoid this because it tends to hurt your ears. I put a bit of foam rubber in one end of the pipe and an old sock in the other to dampen feedback. I like to leave my alternatives open though, so I also didn’t make this a permanent addition. My prototype is essentially a fuzz, as my guitar will overload the speaker quite easily and the tube just adds a bit of strange overtone and what I swear will be the smallest hint of reverb. Sounds wonderful though! Clean tones by way of a related set up would sound good too, but I haven’t constructed one of those yet. Perhaps a larger speaker (4-5″) and an old carpet pipe would probably add better characteristics for clean tones. Try altering the tube material also for a different tone, I almost used a little bit of gutter piping when I first made this, right now I wonder what it would’ve sounded like.

Download the Pipe Bomb Microphone construction in PDF file:
» Download Link

• Voltmeters measure voltage.
• Voltage is measured in volts, V.
• Voltmeters are connected in parallel across components.
• Voltmeters possess a extremely higher resistance.

Connecting a voltmeter in parallel

Measuring voltage at a stage
When testing circuits you often have to find the voltages at numerous factors, for instance the voltage at pin 2 of a 555 timer chip. This can seem complicated – where should you connect the second voltmeter lead?

• Connect the black ( damaging -) voltmeter lead to 0V, normally the negative terminal of the battery or power provide.
• Connect the red ( constructive +) voltmeter lead to the point you exactly where you need to measure the voltage.
• The black lead can be left completely connected to 0V whilst you use the red lead as a probe to measure voltages at numerous factors.
• You may wish to make use of a crocodile clip around the black lead to maintain it in location.

Voltage at a stage truly means the voltage difference in between that stage and 0V (zero volts) that is normally the damaging terminal of the battery or energy provide. Generally 0V will probably be labelled on the circuit diagram as being a reminder.

Analogue meters get a little energy from your circuit under check to run their pointer. This might upset the circuit and give an incorrect studying. To prevent this voltmeters should possess a resistance of at least 10 occasions the circuit resistance ( get this to become the highest resistor worth near exactly where the meter is linked).

Most analogue voltmeters utilized in school science are not appropriate for electronics simply because their resistance is too very low, usually a couple of k. 100k or even more is required for most electronics circuits.

Wiring diagram:

You should look is the color of wires on the wiring diagram, if reversed in the installation of the cable then there will be a short circuit.

Picture above is the wiring diagram for single pole light switch. For the installation of one light that can be controlled from multiple locations, please visit this page.