Schematic Diagram

Friday, December 12, 2014

LED Schematic

Simple LED Flasher - Simple LED flasher by using Nutchip.
AC Powered LED Schematic - Light up LED by using AC supply.
LED Chaser - Simple LED light chaser.
Two Transistor LED Flasher - Flashing LED by using transistor.
16x16 LED Matrix - Prototype of 16X16 LED
Battery powers white LED driver
LED Moon Light
Tri-color LED Controller with Serial Interface

CATV Upstream Fiber Optic Receiver

Upstream fiber links in a community antenna television (CATV) system are usually among the most difficult elements of the network to align properly.Set-top boxes and cable modems employ "long-loop" automatic gain control (AGC) (in other words, far-end power-control), which attempts to normalize the RF path end-to-end.

Alignment is very important because for every decibel of uncorrected optical loss, there's a 2-dB optical-modulation-index (OMI) variance at the transmitting node.

Thermal Fan Controller

The controller uses one or more ordinary silicon diodes as a sensor, and uses a cheap opamp as the amplifier. This circuit designed to be use for 12V computer fans, as these are now very easy to get cheaply. These fans typically draw about 200mA when running, so a small power transistor will be fine as the switch. I used a BD140 (1A, 6.5W), but almost anything you have to hand will work just as well.

Thursday, December 11, 2014

Doubler Voltage with ne555 schematic

This circuit shows a doubler voltage with ne555 schematic.

This be Simple Doubler Voltage circuit, from voltage 12VDC to be 24VDC.

By use Timer IC highly popular the number NE555 and other equipment a little again.

It can give current get about 50mA convenient for the circuit, that use low current the small-sized.

Thursday, November 20, 2014

Create a electric shock resistant tool

Youve electric shock?? .. Well, .. it was nice to recover all your gout! Sometimes true .. but we often do not touch circuit accidentally in the work that is still connected with line / grid (pln) .. pissed, wants I think we stepped on the stuff ..!

Is there any easy way to avoid electric shock in repair work .. can even avoid the occurrence of ESD, if we deal with electronic goods which are sensitive to ESD (PC motherboards, mobile phones, circuit digital etc). you raft just like this series .. used as supply for the solder, when dealing with components which are sensitive to ESD and touch (CMOS IC). the greater capacity of the transformer Ampere. the greater the (good) power which can be handled. The second transformer is identical / similar.

Sensor Ultraviolet UV Tron

Sensor Ultraviolet UV Tron is a flame sensor which is often used to detect the presence of sources of ignition under ultraviolet wave emitted by the fire. UV Sensor UV Tron can be applied with a microcontroller, such as ultraviolet UV Tron sensor is used for detecting the source of the fire on the robot in a firefighting robot contest.

Tron UV ultraviolet sensor accuracy is very high against the existence of sources of fire, so it is suitable for the purpose of fire fighting robot contest that a small fire source in the form of wax.

Power Amplifier Protector

Now you can protect your HiFi amplifier from damage due to overheating. This circuit will cut off power to the amplifier board at the time the temperature was high. Automatically connect the power when the temperature returns to normal. This circuit uses a sensor NTC Thermister heat and also has a warning sound and reset determination.

Amplifier circuit protector is using popular timer IC NE 555 as the temperature controlled switch. The trigger pin 2 is connected to a potential divider consisting Thermister VR and NTC. Thus the voltage on pin 2 depending on the resilience and determination Thermister VR. NTC (Negative Temperature Coefficient) Thermister has a high resistance in the normal temperature and the resistance decreases as temperature increases. Threshold pin 6 of IC is used to reset the IC if necessary. When the pin 6 voltage gets higher than the IC pin 2 will reset and the output is low.

Power Amplifier Protector Circuits

Power to the amplifier board is given by (NC) contact is usually connected from the relay and the switch S2. So that power to the amplifier board will be available through the NC contacts of the relay when the relay S2 and the state is not powered. Thermister resistance is governed by VR triggering pin 2 of IC peaks at normal temperatures. When the temperature inside the cabinet amplifier increases, resistance decreases so that it becomes conductive Thermister. This makes the trigger pin 2 of IC is low and its output is high. T1 works so that the relay energizes and the ringing of a bell. This will damage the electrical supply to the amplifier board. Relay will not be automatically powered when the temperature returns to normal.

Amplifier circuit protectors are very useful to protect your home sound system.