Friday, March 27, 2015
This is the circuit diagram of rain detector alarm. When the sensor is wetted with the water, then the alarm will be activated. This circuit can be used for other purposes.
A 555 astable multivibrator is used here which gives a tone of about 1kHz upon detecting water. The sensor when wetted by water completes the circuit and makes the 555 oscillate at about 1kHz. The sensor is also shown in the circuit diagram.
Tuesday, November 18, 2014
This is the circuit diagran of two tone electronic siren. The scheme is simple and easy to built, it based on two ICs with different task: produce audio signal and amplify the audio signal.
List of Components:
R5: 10K (potentiometer)
C1 - C2: 10 uF
C3 - C4: 470 nF
C5: 10 uF
C6: 220 uF
IC1: Integrated Circuit TTL 7400
Z1: Zener 5 volts 1/2 watt
Speaker 8 Ω
Thursday, June 19, 2014
Here the circuit diagram of PWM Controller which uses complementary half-H peripheral drivers SN75603 and SN75604, with totem-pole outputs rated at 40 V and 2.0 A. These drivers effectively place the motor in a full-bridge configuration, which has the ability to provide bidirectional control.
This is digital clock schematic diagram . This circuit is quite complex and quite difficult for a newbie because this circuit uses IC with...
This is inexpensive inverter circuit which able to convert 12V DC become 220V AC. IC CD4047 is use to generate the square wave of 50hz and...
Here the 500 Watt power inverter schematic diagram . Designed by: Syed Ashad Mustafa Younus Revised by: Ronnie B. Tabanao Click the image...