The Simple long duration timer circuit using OP-AMP, If build the RC timer only that long time delay we need too many resistors and capacitors may be error
This dynamic compressor circuit that The reduction rate of signal up to 20 dB at input between 100 mV to 10 volts. This circuit does not use external power
This power outage alarm circuit can be used to prevent a power failure. Example: Microcomputer systems. This circuit will send logic pulse "1" shortly
Here is a digital to analog converter circuit for control DC motor speed. We control easily a motor to stop and rotate. If need to control it on linear.
This is the high quality 12V-24V PWM Motor controller circuit, at current up to 20A,using TL494-IRF1405 for working with soft start, adjust pulse frequency
The most code switch will be a key number 1 to 10 is good. But when I press a number key often until has track, making it possible to guess the code. This circuit use the normal door bell switch is the code enter. The code include pulse short and …
This is the 3,000 watts Dimmer for inductor load example: the Electric Fan, AC motor,Electric drill etc. But most general dimmers is used for resistors load only such as lamp, soldering iron, heating coil,etc. Why our project can do? The normal dimmer cannot use for inductor load, because the phase …