Electric Dhamaka

Electric Dhamaka Electronic DIY Project
(4)

23/08/2026

📻 Solar Powered Foxhole Radio – No Battery, Fully Homemade! ☀️

In this video, I built a complete foxhole crystal radio from scratch using simple materials and natural energy.

🔹 6 cm air-core coil (400 turns, 36 gauge enamel copper wire)
🔹 Handmade razor blade crystal detector
🔹 Homemade piezo crystal earphone
🔹 Custom built LM386 audio amplifier
🔹 Powered only by two mini solar panels
🔹 No battery used – 100% natural energy

I measured the coil inductance at around 3.5 mH (3500 µH) and experimented with tuning different stations.
The crystal earphone output is very low (as expected in passive radios), so I connected my previously built LM386 amplifier to boost the sound — all powered directly by sunlight.

This project combines:
⚡ RF tuning principles
⚡ Crystal detection
⚡ Piezoelectric sound reproduction
⚡ Solar-powered analog amplification

No radio IC modules. No digital tuning. Pure analog electronics.

Cristal radio circuit diagram.
23/08/2026

Cristal radio circuit diagram.

21/08/2026

DIY PWM Buck Converter using NE555 Timer IC | PCB Build with D882 Transistor & Improved Stability

In this video, I have made a PWM controller using NE555 timer IC and used it to build a simple DC-DC buck converter using transistor switching.

This is a fully PCB-based version and much more stable than my previous breadboard circuit.

🔧 Circuit Improvements in This Version:
- PWM generator using NE555 timer IC for adjustable duty cycle
- Power switching transistor changed to D882 (DW Transistor) instead of BC337 - for better current handling
- Added 22nF capacitor across NE555 IC (Pin 1 & 2 side) for control stability
- Used 10nF + 22nF capacitors for filtering and timing stability
- Added capacitors at both Input and Output side for noise filtering and low ripple
- Improved PCB layout for stable switching operation

⚡ What You Will Learn in This Video:
- How PWM controls voltage in a buck converter
- How duty cycle affects output voltage
- Practical transistor switching behavior
- Why capacitors are important for stability and ripple reduction

This is a perfect DIY project for understanding the basics of switching power supply and PWM control in real-life circuits.

Parts Used in This Project:
All electronic & mechanical parts including D882 transistor, capacitors, axial fan, and PCB components are from JLCMC.com. Jahan aapko motors, sensors, aur hazaaro hardware parts ek hi jagah pe mil jate hain. New users ko up to $123 ke coupons bhi mil rahe hain.


-mc

Best Motor and LED Driver.... Buck converter.
20/08/2026

Best Motor and LED Driver.... Buck converter.

Buck Converter...
20/08/2026

Buck Converter...

Buck converter.
19/08/2026

Buck converter.

Same circuit diagram. Name?
17/08/2026

Same circuit diagram. Name?

When it’s a matter of efficiency, guess the circuit name.
16/08/2026

When it’s a matter of efficiency,
guess the circuit name.

13/08/2026

🔥 PWM Motor Speed Controller using NE555 + IRF540N | DIY DC Motor Control

In this video, I have built a simple and powerful PWM motor speed controller using the popular NE555 Timer IC and IRF540N MOSFET. This circuit can efficiently control the speed of a RS-555 DC motor with high performance and low power loss.
Instead of traditional methods, this PWM-based design improves efficiency and reduces heat generation.

⚙️ Components used:
NE555 Timer IC
IRF540N MOSFET
1N5822 Schottky Diode (used 3 in parallel for extra protection)
47K Potentiometer (speed control)
1K resistor, 100Ω resistor
100nF capacitor (timing)
10µF capacitor (power filtering)
104 (10nF) ceramic capacitor across motor (noise suppression)
RS-555 DC Motor
5V–12V Power Supply

💡 Key Features:
Smooth speed control using PWM
High efficiency compared to linear control
Reduced heating in MOSFET
Added Schottky diode protection for back EMF
10nF capacitor reduces motor noise and EMI
Suitable for DC motors, fans, and DIY projects

🔧 Special Improvements in My Version:
Used IRF540N MOSFET for higher current handling
Added 3× 1N5822 diodes for extra safety during voltage spikes
Added 10nF ceramic capacitor across motor to reduce:
Brush noise
High-frequency spikes
EMI interference

📈 Applications:
DC motor speed control
Fan regulator
Battery-powered projects
Robotics and DIY electronics

⚠️ Note:
Although one flyback diode is usually enough, I used multiple diodes to increase safety margin. The capacitor helps in reducing electrical noise generated by the motor.

🔎 Keywords (SEO):
PWM motor controller, NE555 PWM circuit, DC motor speed control, IRF540N MOSFET project, 555 timer PWM, RS555 motor control, DIY motor driver, electronics project, motor speed regulator, PWM controller circuit

12/08/2026

Full control on RS series Motor.

Address

Kalyani
741245

Website

Alerts

Be the first to know and let us send you an email when Electric Dhamaka posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Shortcuts

Share

Category