Ghost Vane - Wind Direction. #diyprojects #science #electronic

Check out JLCMC' s Linear Motion Sale and Claim the Coupons: jlcmc.com/event/linear-motion-sale?from=XMGBLVN jlcmc.com/?from=OLLU JLCMC is now running a Linear Motion Sale. Selected products including Ball Spline, Steel Linear Actuators, Aluminum Enclosed Linear Actuators, and Linear Actuators with Embedded Guide Rail are 15% off. Extra shipping and product coupons are also available. Check the link and claim your coupons for your next mechanical, CNC, 3D printer, or automation project! 🔋 Solar Powered Flip-Flop LED Circuit | Joule Thief + BC337 Flip-Flop In this video, I have created a simple and interesting electronics project where a solar panel charges a 1.2V Ni-Cd battery, and using a Joule Thief circuit, I boost the voltage to run a transistor-based flip-flop LED circuit. ⚙️ Circuit Explanation: First, I used a 5V 0.2A solar panel to charge a 1.2V Ni-Cd battery. A Schottky diode (1N5819) is used to prevent reverse current from the battery to the solar panel during night. Next, I built a Joule Thief circuit using BC547 transistors and a coupled inductor (L1 and L2). This circuit boosts the low voltage (1.2V) from the battery into high-voltage pulses. These pulses are then used to power a flip-flop circuit made using two BC337 transistors. 💡 Flip-Flop Circuit Details: 2 × BC337 transistors 2 × 22µF capacitors 2 × 10kΩ resistors LED with resistor This creates an astable multivibrator circuit, where LEDs blink alternately. ⚠️ Important Observations: The Joule Thief output is not stable DC; it produces high-frequency pulses. Because of this, the flip-flop may behave unstably or flicker randomly. Initially, I used a 10Ω resistor for the LED, which is too low and can damage the LED due to high current. ✅ Improvements: Replace 10Ω resistor with 220Ω–470Ω for LED safety. Add a capacitor (220µF–470µF) at the output to smooth the voltage. For better performance, a DC-DC boost converter module can be used instead of a Joule Thief. 🧠 Conclusion: This project demonstrates how low voltage from a single 1.2V battery can be boosted to run circuits like a flip-flop. However, proper filtering and current limiting are necessary for stable and safe operation. This is a great beginner-friendly project to understand: Joule Thief circuits Transistor flip-flop circuits Solar charging basics If you like this kind of practical electronics project, don’t forget to like, share, and subscribe! ⚡ Channel: Electric Dham