Schematic Diagram: Project

Showing posts with label Project. Show all posts

Sunday, October 5, 2014

Solar IPod Charger Project and Schematic

Solar iPod Charger Schematic

The Solar Panel

To accomplish our iPod solar charger we acclimated a 250mA 6 Volt Solar Console (available in the REUK Shop). Alike in the brightest sunshine the voltage is not badly aloft that of the iPod battery, and the accepted is affluence abundant to allegation the array in a few hours in ablaze altitude (even in the UK!).

A blocking diode should be acclimated (in the absolute solar console lead) to anticipate the iPod array from boring clarification at night if it is still affiliated to the panel. Unforunately this after-effects in up to 0.7 Volts actuality absent as calefaction in the diode, so it can be larboard out if you adopt to accept a faster charger which will allegation the array in lower ablaze conditions.

Note that abounding solar panels are supplied with a branch adapted blocking diode.

In adjustment to adapt the voltage from our 6 Volt solar console we acclimated an LM317T dent (available from the REUK Shop) in the afterward cool simple circuit:

Voltage

Voltage Regulator

...where R1 is a 270 Ohm resistor, and R2 is theresistor used to set the output voltage according to the following equation:

R2 = R1 * ( (VOUT/1.25) -1 )

Since our desired charging voltage is 5 Volts, we see that ideally R2 would be 270 * ((5/1.25) -1) = 810 Ohms. This is not a standard resistor size, however we had an 820 Ohm resistor which should result in an output voltage of 5.05 Volts.

Wiring up the aloft ambit on a prototyping breadboard with a 270 Ohm R1 resistor, and 820 Ohm R2 resistor we can affirm that the achievement voltage is 5.06 Volts - absolute for our iPod charger. It is capital to analysis that the achievement voltage is about 5 Volts application a acceptable multimeter afore attempting to allegation your iPod or the array and/or iPod itself could be damaged.

iPod Solar Charger Prototyping

Connecting the Charger to the iPod

The iPod is supplied with a USB cable. One end is acquainted into the iPod and the added end has a macho USB-A plug.

It can generally be cheaper to buy a cable with a adapted changeable USB-A adapter and cut it off to use in this project. Simply affix the red USB cable wire to the 5V absolute achievement from the LM317T, and the atramentous USB cable wire to the arena (negative).

According the blueprint beneath the 5 Volt achievement from the LM317T should be affiliated to pin 1, and the arena (negative) affiliated to pin 4.

with TDA7294 Project of circuit potent audio amplifier

Super Amplifier with tda7294 of the St microeletronics, is possible to get potency of up to 100W in an only chip, for an unit stereo to use two same to that. That circuit is based on the datasheet of the ready to work with sources of strong signs, in case it is necessary it uses a pré-amplifier in the form of an opamp. That circuit type with integrated circuit is ideal for systems of involving sound. Because he is quite compact could use an independent amplifier for each one of the high speakers. In that way it can be to share the source dimensioned it is clear to support all the connected amplifiers.

dmos

schematic - diagram circuit for assembly power amplifier tda7294

lists of components: for tda7294

C1 1µF
C2 47µF
C3 10µF
C4 10µF
C5 22µF
C6 4700µF/50V
C7 100N
C8 4700µF/50V
C9 100N
D1 1N4148
R1 22K
R2 680R
R3 22K
R4 22K
R5 30K
R6 10K
SL1 key de Mute
SL2 signal input (Line In)
U1 TDA7294V
X2 Connector AK300/3
X3 Connector AK300/2
several: Printed circuit board, power source +35 -35V / 6A, etc

Sunday, September 21, 2014

Project of circuit potent audio amplifier with TDA7294

to work with sources of strong signs, in case it is necessary it uses a pré-amplifier in the form of an opamp. That circuit type with integrated circuit is ideal for systems of involving sound. Because he is quite compact could use an independent amplifier for each one of the high speakers. In that way it can be to share the source dimensioned it is clear to support all the connected amplifiers. Oh you can remove a wave with that neighbor that bought a " home theater " of 1000W PMPO, and fear in saying that is an enormous potency, when in reality it will verify the real potency of the equipment it doesnt arrive nor to 10W RMS for channel. It already imagined a system of high active speakers with 80W. If it will pass for the marketing department, that where defines the potency PMPO, your system would give... it lets me to see... comparing with the example oh of top... about " 3000 W PMPO ". Game that you have been doing with the potency of the equipments. For you to do your sound system will only need the sign source. Because the amplifier can be perfectly that of here. The necessary subwoofer of a little more of potency then in the datasheet you will find an assembly example in bridge to increase the potency. Below we have the schematic, the Printed circuit board and details of the assembly.

Good luck.

dmos

schematic - diagram circuit for assembly power amplifier tda7294

Suggestion of Printed circuit board to assembly the power amplifier with tda7294

Side of the components to assembly potent amplifier with TDA7294