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Easy add value capacitance

Some circuit we need to use very high value for the capacitance value of capacitors.For example filter circuit etc.
This circuit add capacitance, can use instanced of an difficult which is expensive or very high value.
This circuit was analyzed from the quality of impedance only.
then there is discharged power as same as real capacitors.
You can use the op-amp IC-TL071,NE5534 and LF351 instead of the op-amp IC TL084 for using in circuit.

Be the first to comment - What do you think? Posted by admin - March 29, 2011 at 6:32 am

Categories: Converter Circuit Tags: capacitance circuit, Converter Circuit

USB to Serial Adapter RS-232

USB to Serial Adapter RS-232 Serial Port to USB The USB to Serial adapter (converter) lets you use a serial PDA, GPS, cell, etc. with a standard USB port. This adapter is the easiest way to add a serial port to your computer. Many PDAs, digital cameras, GPS units, barcode scanners, and other equipment require a serial connection, and many newer computers don’t have serial ports.

Source: http://electronics-diy.com/electronic_schematic.php?id=565
Thank you.

Be the first to comment - What do you think? Posted by admin - May 8, 2008 at 1:44 pm

Categories: Circuit com, Converter Circuit, Digital Tags: Circuit com, Converter Circuit, USB RS232 converter

12V input, 12V battery charger by 555,7815

The charger consists of two stages: The first is a capacitive voltage doubler, which uses a 555 timer IC driving a pair of transistors
connected as emitter followers, which in turn drive the voltage doubler proper. The doubler has power resistors built in, which limit the charging current.

BUY Lead Acid Battery Charger Electronic Module

The second stage is a voltage regulator, using a 7815 regulator IC. Its output is applied to the battery via a diode, which prevents reverse current and also lowers the voltage a bit. The resulting charge voltage is about 14.4V, which is fine for charging a gelled or AGM battery to full charge, but is too high as a trickle charger, so don’t leave this charger permanently connected to a battery. If you would like to do just that, then add a second diode in series with D3!

There is a LED connected as a charge indicator. It will light when the charge current is higher than about 150mA. The maximum charge current will be roughly 400mA.

Source:http://ludens.cl/Electron/12Vcharger/12Vcharger.html
Thank you.