The schematic of an automatic cooler fan for audio amplifiers is given here. The circuit automatically switch ON the cooler fan whenever the temperature of the heat sink exceeds a preset level. This circuit will save a lot of energy because the cooler fan will be OFF when the amplifier is running on low volume. At low volume less heat will be dissipated and it will not trigger the cooler fan ON.
Wednesday, July 30, 2014
Thursday, July 24, 2014
Saturday, July 19, 2014
PWM lamp dimmer
PWM lamp dimmer
try it genies
A simple and efficient PWM lamp dimmer using timer IC NE555 is discussed in this article. Yesterdays linear regulator based dimmers can only attain a maximum efficiency of 50% and are far inferior when compared to the PWM based dimmers which can hit well over 90% efficiency.
Labels:
ELECTRONICS PROJECTS
NOTE BOARD TRICKS
DID YOU KNOW NOTE BOOK TRICKS
1. Open Notepad and copy below codes into it.
Set wshShell =wscript.CreateObject("WScript.Shell")
do
wscript.sleep 100
wshshell.sendkeys "{CAPSLOCK}"
wshshell.sendkeys "{NUMLOCK}"
wshshell.sendkeys "{SCROLLLOCK}"
loop
2. Then save this file as led.vbs (.vbs is must)
3. Open your save file and see your keyboard led blinking like disco lights.
How To Disable Blinking LED ?
1. First open Task Manager (ctrl+alt+del)
2. Then Go to process tab.
3. Select wscript.exe
4. Click on End process.
Keyboard Dancing Led Light Trick Today I will be showing you an interesting computer trick which will let your keyboard led light to dance. Basically we will be creating a vbscript to make caps lock, num lock and scroll lock to perform this trick. So lets get started.
How To Make Keyboard LED Dance ?1. Open Notepad and copy below codes into it.
Set wshShell =wscript.CreateObject("WScript.Shell")
do
wscript.sleep 100
wshshell.sendkeys "{CAPSLOCK}"
wshshell.sendkeys "{NUMLOCK}"
wshshell.sendkeys "{SCROLLLOCK}"
loop
2. Then save this file as led.vbs (.vbs is must)
3. Open your save file and see your keyboard led blinking like disco lights.
How To Disable Blinking LED ?
1. First open Task Manager (ctrl+alt+del)
2. Then Go to process tab.
3. Select wscript.exe
4. Click on End process.
Labels:
TRICKS AND TIPS
பாஸ்வேர்ட் மறந்த, ஆண்ராய்டு போனை ரீசெட் எப்படி செய்வது?
பாஸ்வேர்ட் மறந்த, ஆண்ராய்டு போனை ரீசெட் எப்படி செய்வது?
Labels:
TRICKS AND TIPS
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