---
product_id: 30062528
title: "Joule Thief DIY Kit - No toroid Inductor. SMD DC-DC Includes LED"
brand: "farhop"
price: "€ 0.19"
currency: EUR
in_stock: false
reviews_count: 1
url: https://www.desertcart.es/products/30062528-joule-thief-diy-kit-no-toroid-inductor-smd-dc-dc
store_origin: ES
region: Spain
---

# Min Voltage: >0.8V LED Current: 5-10mA Max Voltage: <2.4V Joule Thief DIY Kit - No toroid Inductor. SMD DC-DC Includes LED

**Brand:** farhop
**Price:** € 0.19
**Availability:** ❌ Out of Stock

## Summary

> 🔧 Build Your Future with Joule Thief!

## Quick Answers

- **What is this?** Joule Thief DIY Kit - No toroid Inductor. SMD DC-DC Includes LED by farhop
- **How much does it cost?** € 0.19 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/30062528-joule-thief-diy-kit-no-toroid-inductor-smd-dc-dc)

## Best For

- farhop enthusiasts

## Why This Product

- Trusted farhop brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **DIY Delight:** Perfect for makers and innovators looking to create unique solutions.
- • **Compact & Efficient:** Designed for maximum performance in minimal space.
- • **Oscillation Mastery:** Experience stable oscillation at ~70KHz for reliable output.
- • **Power Up Your Projects:** Unlock the potential of low-voltage applications with ease.
- • **Versatile Output Options:** Achieve ~3.36V Vpp and ~1.71V Vrms for diverse applications.

## Overview

The Joule Thief DIY Kit is a compact and efficient solution for low-voltage applications, featuring a minimum working voltage of >0.8V and a maximum of <2.4V. With an oscillation frequency of ~70KHz and versatile output options, this kit is perfect for DIY enthusiasts looking to innovate and create.

## Description

This Joule thief board allows you to use source voltages at 1.5 volt or lower to give you 3.3 Volts of output. This allows you to run an LED with a used almost empty battery.  Note:This circuit is optimized to drive led's only, you may have problems driving other loads like motors etc. Technology:  It's a new designed joule thief which uses SMD components and doesn't require a toroid inductor to work correctly. Large SMD input and output pads make it easy to solder wires on it or even solder one LED directly on the pads. The small size of the board (10x16mm) make it ideal for flashlight upgrades or DIY flash lights. The efficiency of the circuit is around 70%, generally the more the input voltage the more the efficiency. Unlike other kits this one is doesn't use a toroid inductor which may cause problems building or testing it, plus the small size. You can use any source voltage between 0.8 and 2V, feel free to experiment. The whole board was designed and built in EUROPE, this is not a Chinese product.  Advantages: 1) Small size (10 x 16mm) 2) Reliable (unit is tested and working) 3) Ready made board (no need to build it yourself) 4) Easy to use, one input one output. 5) Can use more than one LED in parallel e.g. 3 LED's (series is not recommended) 6) LED current is rated at 5-10mA depending on your input. Specifications: Min working voltage: >0.8V Max working voltage: <2.4V Led current rating: 5-10mA depending on your input. Oscillation frequency: ~70KHz Vpp output: ~3.36V Vrms output: ~1.71V What do you get: 1 Joule thief board assembled and tested 1 White LED included.  This is not a kit, but does require LED to be soldered to board. Unit is as shown in main picture.

## Features

- Min working voltage: >0.8V
- Max working voltage: <2.4V
- Led current rating: 5-10mA depending on your input.
- Oscillation frequency: ~70KHz
- Vpp output: ~3.36V, Vrms output: ~1.71V

## Images

![Joule Thief DIY Kit - No toroid Inductor. SMD DC-DC Includes LED - Image 1](https://m.media-amazon.com/images/I/71TUF2XmjiL.jpg)
![Joule Thief DIY Kit - No toroid Inductor. SMD DC-DC Includes LED - Image 2](https://m.media-amazon.com/images/I/81AoDhd7pYL.jpg)
![Joule Thief DIY Kit - No toroid Inductor. SMD DC-DC Includes LED - Image 3](https://m.media-amazon.com/images/I/81RxNLGSCzL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ They work great for letting low voltage sources run LED's
*by J***N on February 16, 2018*

I am a STEM teacher and use these in a classroom lesson on energy harvesting. They work great for letting low voltage sources run LED's. Usually an input of around 550 mV will cause a red LED to illuminate. These are small enough to tuck away in tight places.

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**Shop now:** [https://www.desertcart.es/products/30062528-joule-thief-diy-kit-no-toroid-inductor-smd-dc-dc](https://www.desertcart.es/products/30062528-joule-thief-diy-kit-no-toroid-inductor-smd-dc-dc)

---

*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-03-03*