August, 2011

Bounceless Switch circuit

Monday, August 29th, 2011

Bounceless Switch Apr 11, 2010  This be simple bounceless switch circuit, In the character electronic switch a kind is one. That be of good quality tall and low noise convenient 

Simple bounceless switch using CD4049 This be simple bounceless switch circuit, In the character electronic switch a kind is one. That be of good quality tall and low noise convenient for the digital. If switch usual apply to digital circuit like to to get into trouble promise disturb easy. It make the circuit works can make a mistake. This circuit [...]

Simple Bounceless Switch by 4011 My friend want circuit Bounceless Switch,in testing digtal circuit. This is Simple Bounceless Switch by 4011 ( hot IC) The bounceless output have logic digital,it control by S1. Detail more, Please read in this image circuit.

Drive SCR thyristor by IC 555 This circuit gives a burst of pulses to fire 2 SCRs, when pin 4 is taken to 12V the SCR is turned on, to use this circuit you need 12V short pulses phase shifted with respect to AC sine wave on bridge. This way you can control the bridge from near 0% to near 100% [...]

Electronic (foot)switch by IC Digital This is a simple circuit for an electronic switch – I’d designed this for an external footswitch module but also with a duplicate button panel mounted. There are enough gates spare to easily make a dual version. Output – 0v to +V Gate (switchable Mom or Tog), plus trigger signal (c. 1ms pulse) each time [...]

Touch Switch By IC 4001 & 4020 Circuit Touch Switch By IC CD4001, CD4020 This be touch switch be simple again the circuit. It use integrated digital circuit is important equipment, and use volt power supply low just 9V. By use single metal, it works in the character turn ON and turn OFF. By when touch for the first time turn ON [...]

Transformerless Power Supply

Wednesday, August 24th, 2011

Power supply no-transformer
Transformerless Power Supply


Transformerless Power Supply
I have received a few emails asking for a transformerless power supply. Here is such a supply. This supply uses no heavy step down transformer and has an extremely low parts count. The circuit can be built very small and can supply small currents for small projects. The major downfall of this supply is that [...]

Power Supply 9VDC no transformer This is circuiut power supply 9VDC no transformer,It easy circuit and small size. Volt output = Volt Zenerdiode. Output Current 100mA (min). It easy circuit and small size. Power Supply 9VDC no transformer You may know the reason that make power supply circuit have large-sized as a result , because transformer. Way this out be [...]


120 and 240Vac LED Voltage Indicator
Useful for power lines control Simple, transformerless circuitry This circuit, designed on request, has proven to be useful to indicate when the voltage in a power supply line is changing from 120V to 240Vac. It can be used in different circumstances and circuits, mainly when an increase in ac or dc supply voltage needs to [...]


12V Transformerless Power Supply
This circuit will supply up to about 20ma at 12 volts. It uses capacitive reactance instead of resistance; and it doesn’t generate very much heat.The circuit draws about 30ma AC. Always use a fuse and/or a fusible resistor to be on the safe side. The values given are only a guide. There should be more [...]

DC Regulator supply 15V non transformer Friends at don’t like large-sized of a transformer. I begs for to advise 15VDC regulator power supply can give the trend current get low about 80mA not exceed. But enough will usable small-sized circuit has comfortablely. Think I uses Zener Diode be formed help maintain one’s position volt be stable , and use Transistor help [...]


Negative Volage Regulator 6V not use Transformer
If friends with look for Mini power supply 6V sizes. That give negative voltage. I begs for to advise this circuit. It has prominent small-sized point and light weight. Because do not use Transformer. But still can use current get 0.07Amp not exceed and when see the circuit. Think use Zener diode control voltage be [...]