Rangkaian delay speaker amplifier-Audio amplifier output relay delay

you can get the advantage by using this circuit it that: if there is a relationship fuse x speakers with amplifier circuit will be disconnected immediately, so that the speaker is safe from disaster.waktu waiting or delay time is approximately 5 seconds, and can be altered by changing capacitor C2 elco with more value small. The time needed to re-open relay if the current cut off about 0.5 secondscomponent tobuilt this : C1 100 uF 40V electrolytic C2 100 uF 40V electrolytic D1 1N4007 D2 1N4148 Q1 BC547 R1 33 kohm 0.25W R2 2.2 kohm 0.25W RELAY 24V DC relay, coil resistance >300 ohm

Ground Plane Antenna schema Circuit

This Ground Plane Antenna schema Circuit antenna skesta buffer should use non-metal materials / is not electrically conductive. and the best option is to pipe 49 mhz frequency usage PVC.Untuk length of the vertical element is 57 inches and is 59 inchi.antena gruondnya element has a weakness that is not strong enough to accept or reflected signals, because of its omnidirectional or all directions, for directional antennas YAGI antenna should be used, and we will review at a later time

Ground Plane Antenna schema Circuit

Rangkaian Antenna Panjang

For this antenna skesta lights should be installed on a wire hook that was at home. This is used to avoid tertabaraknya wire at night, so if you can pull the wire pairs rather forcefully tinggi.Usahan wire antenna sehigga terayn not swinging by the wind.

Rangkaian Sketsa pengusir serangga-insect repellant

This skesta insect repellent should be installed inside or outside the house / for the speakers. Combination of this circuit adl oscilator PLL circuit / phase looked loop by using the CMOS 4047 with a frequency of 22 khz.gunakan external power supply, so the results are better.

PCB Parametric Audio Equalizer

This project is based on the parametric equalizer proposed by Elektor in the late 80s or early 90s and later published in the book "Creations electroniques" in 1993 (Publisher: Publitronic). Their design involved three stereo potentiometers per channel, which means a lot of cables from the front panel to the circuit board. It's quite tiedous to build and IMHO prone to noise from within the enclosure. To solve these problems and make the unit more compact I have put everything on a single board, potentiometers included. No more cables!

A graphic equaliser has only one control per band: the gain. A parametric equaliser has 3 controls: gain, frequency and width. While a graphic equalizer requires a lot of bands to correct the sound, a parametric equaliser is more acurate and usually only one to three filters are used in series.

Several modifications were made to allow these improvements. First, it's an all-SMD board: easier and cheaper to build. This is necessary because clearance is limited with the front pannel. More importantly, it is important to realize that several PCBs will be stacked next to each other for the different filtering stages (usually 3, as Elektor says) and therefor we have no space to extend the PCB without spacing the potentiometers too. The only other option would be to use DIL circuits and several stacked PCBs: not very practical or cost effective.

skema Parametik Equalizers

Brought to you from the man who invented the term “Parametric Equalization”, the 8200 has been an industry standard for over twenty years, and can be found on virtually every major recording studio’s stereo bus. Each of the five broadly-overlapping bands offers 15dB of Boost or Cut and adjustable bandwidth (or “Q”) from 0.4 to 4. The lowest and highest bands also can be switched to Shelf mode. Quite simply, the 8200 is the archetype Stereo Parametric Equalizer. Its extraordinary resolution, benchmark transparency, generous headroom, and surgical precision have been the reference for many other equalizers, but exceeded by no other. The 2U 8200 uses one 8355 PSU. .

skema Parametik Equalizers

Skema Parametric Equalizers

The great advantage of a parametric equalizer is that it allows the user to change the frequency and Q. However, this is offset by the fact that this very ability complicates the inexperienced user's efficacious use the system. Adjustments can be so complex that the needed change might be difficult to determine.

A parametric equalizer uses knobs for its control functions, which makes it more difficult to visualize the set-up of the equalizer. Even so, it admirably performs the main functions of an equalizer which is to control the loss and gain in a frequency within a sound system.

Parametric equalizers usually have 3 to 6 bands. Some have overlapping frequency ranges. Others have broadband control which allows it to be used over the complete frequency range. Most parametric equalizers have a switchable range switch that allows operation in a x1 or x10 mode, allowing the frequency to be equalized on an even finer scale.

Found in almost every venue, the parametric equalizer certainly has its advocates, but it has by no means replaced the graphic equalizer as the preferred device for sound technicians.