For all
electronic hobbyists out there, CircuitsToday is listing some of our own
hobby electronic circuits for you. Most of these circuits have been
tested by us. You can bring in your own modifications to the circuit.
For beginners, these electronic hobby projects may be a little
difficult. You can feel free to comment below and ask whatever you want
to know. We will help you with whatever information we can provide.
Click on the link of each heading given in the list below, to go to the
main content. Do not forget to check out the comments as well, to get a
better idea of the electronic hobby circuits.
This hobby circuit is used to produce an
alarm as soon as the light inside a room goes off. The main components
used are a basic 555 timer IC and Light Dependent Resistor (LDR),
and an output buzzer alarm. The output of the sensor is given to the NE
555 IC. When there is proper light inside a room, the resistance of the
sensor will be very low. As soon as the light goes off, the resistance
begins to increase. This in turn triggers the IC which is connected to
the alarm, and thus produces an output sound. This type of hobby
projects can be easily modified to switch other electrical components by
using a relay and a transistor to be connected to the output of the 555 timer instead of the buzzer alarm.
This interesting circuit is used to make
a musical horn as soon as you put your car in reverse gear. This type
of hobby electronics projects works with the help of two integrated
circuits. One is a simple 7805 voltage regulator IC that is used to
minimize the car battery voltage to 5 volts. A further drop to 3.6 Volts
is needed and this is given by two diodes. This voltage is given to the
second IC, called the UM66. This IC is known to be a music generator.
When the car is put in reverse gear, the switch becomes on and the
circuit gets connected to the car battery. This causes the UM 66 to
produce a music tone. This tone can be further amplified by connecting a
transistor driver from the output of the IC to the loudspeaker. The
hobby circuit diagram can be seen in the main post given above.
The hobby circuit diagram of the circuit
is given in the original post. This circuit uses an astable
multivibrator using a 555 timer IC. The clock pulses from the timer are
given to an IC called CD4017. The output of the IC becomes high
alternatively. Thus, the LED’s also turn on alternatively, giving it a
dancing feel. You can customize the speed of the LED glow by changing
the frequency of the clock pulses generated by the timer IC.
Hobby circuits such as these can be made
with the help of the sound generator IC HT2844P. The IC is designed to
produce four different sounds of a jet engine like the missile sound,
machine gun sound, high speed sound and low speed sound. Each sound is
assigned its respective IC number. You just have to connect the
associated pins to the ground by using the respective push button
switches. You can also connect an LED to the circuit as an indicator to
show that the sound has been activated. The hobby schematics can be
obtained from the original post given in the link above.
The circuit consists of a CMOS Hex
inverter IC which helps in producing a small beeping sound, whenever you
make a whistle. The beeping sound will last for about 3 seconds. There
are altogether 6 inverters in the IC. One of them is connected to an
audio amplifier that amplifies the signal packed by the microphone.
Another inverter of the IC is connected as a Band Pass Filter (BPF) with
a center frequency of about 2 kilohertz. The circuit also contains an
astable multivibrator and a monostable multivibrator apart from the
buzzer output. Check out the hobby circuit diagram show in the link
above.
A condenser mic is used as a sensor to
sense a puff made by the user and thus make an LED switched OFF. Two
transistors are connected as a latching pair, which drives the LED to
glow. The LED remains ON as long as the puff is given to the mic. The
mic converts the sound pressure into an electrical signal and is
amplified by a transistor. The output of the transistor drives the LED
to the OFF state. A switch must also be given to turn the LED back t its
glowing position.
The circuit consists of a small touch
plate controller using the 555 timer IC. Hobbyists can easily design
this circuit for various applications like doorbells, buzzers, toys, and
so on. The circuit mainly consists of a relay that operated for a
preset time and then turns off immediately as soon as anything touches
the touch plate. A transistor is also used to drive the relay, which can
be used to drive loads like bell, lights or motor.
Electronics enthusiasts may find this
circuit very interesting. The main objective of the circuit is to
provide sequential signal light in automobiles. Two main IC’s are used
in this circuit – a TS 555 CN CMOS timer IC and a CD4017 decade counter
IC. The CMOS IC is connected as an astable multivibrator so as to
trigger the other one. When the CD4017 IC is triggered, the output will
go high and low in sequence and the speed of the sequencing will be
proportional to the triggering frequency. Four transistors are also
provided to drive the corresponding Light Emitting Diodes (LED). Check out the comments on the post as well to know more about the modifications that can be brought to the circuit.
This circuit can be practised on your
car for sensing the distance between the rear bumper of the car and any
obstacle behind the car. The distance can be understood from the
combination of the LEDs used in the circuit. The 555 timer is used as
an astable multivibrator in the circuit. This timer drives the infrared
diode that is connected in the circuit to emit infrared pulses. The
operating frequency of the transmitter is around 120 Hertz. Take a look
at the circuit diagram to know more about it. A detailed explanation is
also given in the post above.
A timer IC is used as an astable
multivibrator here at a frequency of 10 hertz, along with a 74LS76 dual
JK flip flop. The main objective of the circuit is to toss head or tail.
The output of the timer is inverted using a transistor. The component
details and the explanation is given in the post above. 
No comments:
Post a Comment