Wiring circuit

In the articles devoted to the remote GSM modules, we have repeatedly mentioned that the programming of the numbers in the list of those qualified to command the devices and the configuration of all operating parameters could be done avoiding the long and expensive procedure through SMS; in fact we made reference to an application software that could take advantage of the USB interface to connect with our modules and check the current settings or to add new configurations. Well, now is time to talk about this program, created to facilitate the task of those who must install our TDGs. This program is really useful for the gate opener where a lot of time could be spent entering from a mobile phone, via SMS, the many numbers a phone can contain and that would cost quite a lot (unless you have a special free SMS formula with your service provider).
The software runs on Windows and needs relatively limited resources, in fact, the system requirements basically are:
- 30 MB of free space on your Hard Disk;
- a free USB port;
- XP/2000/Vista/7 OS Microsoft Windows – 32-bit or 64 bit.
This software allows you to set the settings for Remote Control, just connect the device via USB and the computer will immediately recognize the device since among other functions, our program automatically recognizes the remote that is connected. In practice, according to the connected device the program adapts its user interface, showing in the main dialog box only the tabs that relate to its configuration, excluding the rest.
Let’s now we see how to use the program and what are the functions therein.
Boxes Com Port  and Baud Rate summarize the information about the virtual open COM for the USB connection.
First of all, in the Information tab we find a summary of all the characteristics of the remote control during the configuration phase, i.e. model (TDG133. .. TDG140), firmware version and IMEI of the cell module installed.
The bottom section contains log information about the events registered by  the remote.
In the menu bar there are two commands:
Exit which allows you to leave the program and Database  which opens the window Phonebook, this window displays the stored phone numbers; in this window the buttons Clear List and  Update List  allow you to remove the directory or to update it. In the latter case, the program sends the new phonebook to the remote. Clicking on the question mark, instead, you get information about the program, i.e. release and more.
It should be noted that in the lower section of the main window, there is the indication “pending call from Master Number” in case you connect a remote control that has not stored at least one number, or in which the Easy Setup has not been performed.
In the same section, by clicking on Enable Extended LOG you access the dialog box shown on the left, in Figure 4, which contains all data received on the “COM” port of the computer you are using.
The Master Numbers section summarizes the numbers in the list (8 maximum) authorized to carry out the configuration and issue commands via SMS.
Let’s see the main program window when you connect a remote DTMF (TDG140): it shows the storage of a number of those qualified to command, note that you can define (using the Position box) the position where to store the number as well as the name of the person who owns the phone you are storing.
The Phone Numbers  tab can be seen connecting any remote control version to the computer. Let’s now see the main window, specific for the TDG133 gate opener and the TDG134: note, in the right section, the tab Gate Opener Numbers, next to tab Master Numbers. By clicking on that tab, you access the window that summarizes the list of numbers related to the gate open control.
The main window of the program, in addition, offers the tab Telephone Numbers, which is different from the one seen before: in fact here there are two sections that are used to store and display both the master numbers (Master Numbers) as well as the names of the phones that can simply operate the remote control relay (Gate Open Numbers). Only for master numbers there is the possibility to specify the position where to save them.
Well, let’s now take a look at the Notices window that we can find in the remote control with two inputs, in the DTMF remote control and in the GSM thermostat.
There, you can specify, for each phone number included in the list of master numbers, that in case of failure it has to receive the alert via SMS, with a simple phone call, or by means of both methods. The selection is made by putting a tick in the boxes, on the understanding that it is not mandatory for the numbers to receive the notifications: the remote control also works without activating the function.
For the GSM remote control 2 IN – 2 OUT, and the DTMF remote there is, in the main window, a tab used to set the alarm logic and the timing for the detection of the input alarms. Specifically, the tab allows to check (by querying the remote control) or to change the alarm conditions recognized at the inputs, namely the activation logic (i.e. if the input must be considered in alarm when power is supplied or in absence of power or just when there is a change in the status) the inhibition time between a level determining an alarm and the next one, as well as the observation period, that is the time range for which the alarm condition must persist in order to be considered as such.
When checking the option box Request Set Times  and by clicking on Run on the Timing  section, you can request the state of the intervals set for the recognition of the input alarms, the program responds with the notice box shown here.

The following is a circuit of amplifiers are equipped with the suitable regulatory tone in use to strengthen the electric guitar, employing a single-rail supply of regarding 60V and capacitor-coupling for the speaker . the benefits for a guitar amplifier are the terribly simple circuitry, even for comparatively high power outputs, and an explicit built-in degree of loudspeaker protection, owing to capacitor C8, preventing the voltage supply to be conveyed into loudspeakers in case of output transistors failure.

In all cases where Darlington transistors are used because the output devices it is essential that the sensing transistor (Q2) should be in as close thermal contact with the output transistors as potential. thus a TO126-case transistor sort was chosen for straightforward bolting on the heatsink, terribly near the output combine

R30 must be cut so as to live regarding half the voltage supply across the positive lead of C7 and ground. an improved setting is done using an oscilloscope, so as to get a symmetrical clipping of the output wave type at most output power

P1,P2______________10K Potentiometers
P3_________________10K Potentiometer

D1,D2____________BAT46 100V 150mA Schottky-barrier Diodes
D3_________________LED

Q1,Q3____________BC546 NPN Transistors
Q2_______________BC556 PNP Transistor
Q4,Q5____________BD139 80V 1.5A NPN Transistors
Q6_____________MJ11016 120V 30A NPN Darlington Transistor
Q7_____________MJ11015 120V 30A PNP Darlington Transistor

J1,J2___________6.3mm. Mono Jack sockets
SW1,SW2___________SPST Switches
SPKR______________speakers 8 or 4 Ohm with Minimum power 75W

Author: Raj K. Gorkhali Copyright: Elektor Electronics 2007

• Wide supply voltage range, 9V to 16V
• Large volume control range, 75 dB typical
• Tone control, ±15 dB typical
• Channel separation, 75 dB typical
• Low distortion, 0.06% typical for an input level of 0.3 Vrms
• High signal to noise, 80 dB typical for an input level of 0.3 Vrms
• Few external components required

Note:
Vcc can be anything between 9V to 16V and the output capacitors are
10uF/25V electrolytic.

Tone control or pre-amplifier is an amplifier circuit supporters. Sometimes some of us do not know where a good amplifier, a raft alone and the results are not much different or even the same. Therefore we must know the character of the advantages and disadvantages of each amplifier equipment.

Tone control low noise here does not mean without noise, but noise compared with the lowest tone control on the market, for example Ronica transistor 4, TL-084, TC-2 LM833 etc.

Jump toexplanation of each component ...

Potensio 1 serves to regulate the intensity / level of the incoming signal is assisted potensio 2 as balance / counterbalance. Potensio 2 is still installed and is usually an optional component. 1-2uF/250V capacitor R1 is actually a brand name,but I prefer to replace it with a 1K resistor / 5% normal for reasons to avoid hum and interference sensitive. R2 R3 while minimizing interruption to adjust the impedance OP-amp 1. R4 and R5 serves to increase the gain of 1.3 times. Pre amplifiers typically use a strengthening standards by 2 times, but by most of us think it has a noise. So I chose the value of 1.3 times, but the most minimal noise signal from the volume is enough to make the lamp light peak.

For low noise ...Cause of noise in op amp 1, apex audio even eliminate this stage. CanThis step is also used as a buffer (jumper R5), the strengthening of a time. Lower values ​​increase the value of R5 or R4 with consequent gains to be less, but remains at a value above 1 times due to input non-inverting path to take, so that the signal and noise can be reduced. R4 can also be replaced with a 10K trimpot and middle leg into the bass range adjuster (bass resonance).

C1 and C6 as a filter to reduce the treble / high frequency of excessive or often called oscillation prevention. R6 is actually an optional component of the impedance a little help customize the system. Ideally the same as the R8 R7 to facilitategive the sign of the gain on potensio panel tone control. C2 and C3 form a series circuit treble filter (high pass filter), its value is greater then the sound that passed the mid. C4 and C5 assisted by R9 and R10 form the low pass filter (filter bass), the greater the value of C is a bass sound that will be missedthe soft / low (maximum of 47nF), the smaller the value of c is the bass signal that is passed will further dip (dig-dig, c4 = c5 = 22nF). This value is suitable for 27-33nF, 47nF instead (depending on taste). Pot 3 & 4 pot set treble and bass levels, the greater the greater the value of this potensio gains (bass & treble including potensio volume). R11 adjusts the output impedance, while the R12 and the red LED indicator that shows if the amplifier Peak has been given a full signal.

15V maximum supply. TL074 IC can, but in designing the PCB, IC can bereplaced with 2x TL072/NE5532/4558.

3 Band Tone Control circuit uses an op-amp as an amplifier end. Tone Control circuit is a regulator of tone bass, midrange and treble or 3 band called because it can set the three tones. Filter circuit is applied to the series of "Tone Control 3 band" This type baxandal like the title of this article.