36 Hobby Electronic Projects

Are you bored? Watching TV or playing games not your way. Let’s do the Hobby Electronic Projects. I try to collect project lists. You may build quickly them when having free times. Most cheap and easy to find parts.

hobby electronic projects

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100w amplifier circuit with PCB

100w amplifier circuit with PCB - Electronic Projects

This 100W amplifier circuit using transistors, but very well OCL amplifier schematic. Use transistor MJ15003, MJ15004 as main. Power supply +38V 0 -38V 3A. […]

Automatic NiMH battery charger circuit

Ni mh battery charger circuit using TL072

The project is the NiMH battery charger circuit on automatically shut off when fully charged. Can charge batteries 1-10 pcs. Depending on the input voltage […]

Simple electronic drum circuit using MC14046

electronic drum using MC14046
Simple electronic drum circuit project is an Instrument of this era really, various sound effects and many others, using digital IC and more…

0-30V 20A High current adjustable voltage regulator circuit

If you are looking for a high current Adjustable voltage regulator circuit. This may be a better choice for you.
4-20V 20A High current adjustable power supply
It can give the output current 20A or 400watts and can adjust the voltage of 4 to 20V—or apply to 0 to 30V easily. It is good quality, excellent performance and durable with PCB.

 

40W transistor audio amplifier circuit with PCB

40w transistor power amplifier circuit with PCB
Good transistor audio amplifier circuit, at 40 watts OCL RMS using 2N3055+MJ2955 is easy to build, and very inexpensive. To use Power Supply +35V -35V 2A.

LM350 adjustable voltage Regulator

LM350 adjustable voltage Regulator project

This is a 3A adjustable regulators using IC-LM350 that looks like LM317 Variable DC Power Supply, but high current higher 3A, adjust voltage 1.2V to 30V.

50W OCL main amplifier using LF351 with PCB

50W main amplifier OCL

This 50W OCL main amplifier circuit has high quality and economical,it is designed simple, easily created, electronics rookie.cheap when compared to other

3A Variable power supply using LM317&2N3055

Best 3A DC power supply adjustable voltage 1.2v to 20V and, 3v, 6v, 9v, 12V using lm317 and 2n3055
LM317, 3A adjustable voltage regulator circuit diagram
Output: 1.2V to 20V, and 3V,6V,9V,12V

High quality, 3A adjustable voltage regulator. Using LM317 and 2N3055 so easy and cheap. Adjust voltage in steps 3V, 6V, 9V, 12V. And In fine, 1.25V to 20V.

0-60V Dual Variable power supply

0-60V Dual Variable power supply circuit using LM317&LM337

This is a 0-60V, Dual Variable power supply circuit using LM317 and LM337 at 1.5A current so can builds to easy with PCB layout, adjustable voltage VR1,VR2 […]

Simplest automatic solar night light circuit

Simplest Automatic Solar Light from Water Bottle
Simplest Automatic Solar Light from Water Bottle

This is the simplest automatic solar led light circuit that my son try to make it for a basic small solar charger. to use 2 x AA NI-MH battery total 2.4V

Simple solar plant watering alarm

we created Simple solar plant watering alarm project successfully
This is a simple Solar plant watering alarm circuit. It will sound alarms when the soil is dry. The trees have died. It the solar cell is 6V DC power supply…

Solid State Relay circuit

Professional solid state relay circuit

The special Relay that used replace normally relay, very fast contact load, low voltage input 3V to 24V only…

Bass guitar super bridge amplifier 200 watt

Bass guitar super bridge amplifier 200 watt.

It is a guitar amplifier circuit diagram with PCB layout. Power output at 200 watts in super bridge model so help to you have a high-quality circuit in cheap. […]

Simple High power LED flashlight

Simple High power LED flashlight by chayapol

This is simple hight power LED flashlight,we use 24 LEDs super bright for display and 3 AA batteries and resistor for limit current so cheaper.

Graphic equalizer circuits with PCB layout for you

5 Channels Graphic Equalizer using LA3600

This is graphic equalizer circuit with PCB on 5 channel and 10 channel using LA3600. Cut frequencies of 50Hz, 200HZ,800Hz,3.2kHz10kHz. Supply voltage +12V. […]

How to make fast blinking lights for bike

Fast-blinking-LED-bike-light

This is a fast blinking LED bike light circuit For safety when the bike at night. We use two-NPN-PNP transistor oscillator circuit and RC circuit only show on 4 LEDs…

TDA2030 Audio Amplifier Circuits

tda2030-audio-amplifier-circuit

SEE! TDA2030 audio amplifier circuit. To make many amplifier 10W to 120W. Mono or Stereo and OTL, OCL, BCL (Bridge amplifier) I love it.

AC variable power supply, 0-30V 3A

AC variable power supply, 0-30V 3A

This is an AC variable power supply circuit that applies the output of 0-30V at 3A by use electronic components, bridge diode, and more, to control voltage[…]

Big digital clock circuit without microcontroller

Big digital clock circuit without microcontroller

This is Big digital clock circuit without microcontroller, This projects use all CMOS ICs for learn digital and use 7 segment 6 inch LEDs and AC line 50Hz. […]


Infrared Remote control 50 feet 2 Channel

Infrared Remote control 50 feet 2 Channel

This infrared remote control can control working of 2 channel or can use to control two Electric appliance, each one on-off freely and a maximum of 300 watts on Control…

Fire alarm circuit using infrared Smoke detector

The-cheap-firThe cheap fire alarm circuit using infrarede-alarm-circuit

This is the cheap fire alarm circuit that Uses the principle of infrared sensor smoke. When cause events fire. The principle is simple and affordable.

60 watt stereo amplifier circuit using LM3876

60w-stereo-amplifiers-without-customization

This is complete stereo amplifier circuit 60W +60 W without customizing. Which is easy to build, sound quality, and cheap because of the LM3876 works perfect. […]

Power bank mobile charger circuit using LM1086

Power bank mobile charger circuit using LM1086
Power bank mobile charger circuit using LM1086

Power bank mobile charger circuit project to backup energy when use portable mobile no electrical outlet. Use LM1086 as main on low dropout voltage. […]

60W RMS OTL integrated audio amplifier circuit

55-watts-rms-classic-otl-integrated-amplifier-that-you-build-easily

This is 60W RMS OTL integrated audio amplifier circuit using 2N3055 and normal transistor so cheap and can build easily and It’s durable and very loud sound […]

2N3055 amplifier circuit, 30w OCL integrated amp with PCB

30-watts-rms-integrated-amplifier-projects-using-cheap-transistors

The integrated amplifier that is smaller. For listening in a small room. Must have good sound quality. Low noise and cheap.

Digital temperature meter using LM335 or LM135

Smoke detector circuitDigital temperature meter using LM335 or LM135

This is a digital temperature meter circuit that has High the accurate temperature measurement. it uses ICL7107 for LED 7 segment display and LM335 or LM135.

Digital capacitor meter projects easy to build

Digital capacitor meter projects easy to build

I recommend the digital capacitor meter projects. It can measure capacitors ranging from 1pF to 2,000 uF. Which covers almost all of the capacity. And cheaper […]

Super AC dimmer using IC-555& TRIAC

the-complete-circuit-of-supper-dimmer

The super dimmer it is certainly better than the normal dimmer you are using now. It would be better, however, to try to prove it. Let’s see how it works circuits.

The PIR Movement detector with light-activated

>pir-movement-detector-with-light-activated

This is a PIR motion sensor circuit. The movement lasted only one. the detection accuracy of Pyroelectric. As a product of a Passive infrared detector PIR. […]

Music dancing light circuit, 4500 watts using Opto isolator

super-dancing-ac-lights-4500-watt-using-opto-isolator

This is high power music dancing light circuit, 4500 watts load using optoisolator so safe of AC line. It controls light flashing by music input, use Triac driver load.…

Ultrasonic sensor circuit project with versatile controls

ultrasonic-motion-detector-project-with-versatile-controls

Build the Ultrasonic sensor circuit project with versatile controls. to radar systems, when we send out the waves, then detects the reflected back.

100W DC servo amplifier circuit using Power MOSFET

100 watt DC servo amplifier circuit by Power MOSFET

DC servo amplifier circuit, OCL Output 100w , use mosfet k134+j49 or Mosfet J162 + K1058, Output 112W at Speaker 8 OHM. Power Supply +56V/-56V 4A /Ch. […]

Super digital echo stereo mixer circuit projects using KT5211P

super-stereo-digital-echo-circuit

This digital echo stereo mixer project is circuits pioneering in echo circuit before using IC-BBD to the digital system. By using digital echo circuit.

2 channel 100w stereo audio amplifier circuit by STK4231II

2 channel 100w stereo audio amplifier circuit by STK4231II

2 channel OCL 100W stereo audio amplifier circuit. It uses STK4231 IC products to create a simple one all PCB, small and best economical.

100 watts OTL amplifier circuit using transistor MJ15003-MJ15004

OTL Power Amplifier Circuit using Transistor MJ15003 MJ15004 With PCB

This is 100 watts OTL amplifier circuit using a transistor, For a small PA system, in the village. The sound is very loud and very durable, easy to builds better […]

First simple mosfet amplifier circuit by K134+J49

First simple mosfet amplifier circuit by K134+J49

The first simple mosfet amplifier circuit with PCB, It most complete circuit. As a 60 watt power amplifier, this is sufficient for normal use in my home. […]

If you try to create these projects Or have any comments Do not delay. Hurry and tell us. Everyone wants to see you overcome the boredom.

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