--- product_id: 470876258 title: "HiLetgo 4pcs LM358 Weak Signal Voltage Amplifier Secondary Operational Amplifier Board Module Single Power Signal Collector 3.5-24V" brand: "hiletgo" price: "€ 20.63" currency: EUR in_stock: true reviews_count: 2 category: "Hi Letgo" url: https://www.desertcart.gr/products/470876258-hiletgo-4pcs-lm358-weak-signal-voltage-amplifier-secondary-operational-amplifier store_origin: GR region: Greece --- # 3.5-24V wide DC input Compact 45.3x16.2mm board size Dual potentiometers for precise gain tuning HiLetgo 4pcs LM358 Weak Signal Voltage Amplifier Secondary Operational Amplifier Board Module Single Power Signal Collector 3.5-24V **Brand:** hiletgo **Price:** € 20.63 **Availability:** ✅ In Stock ## Summary > 🔊 Unlock Hidden Signals, Amplify Your Innovation! ## Quick Answers - **What is this?** HiLetgo 4pcs LM358 Weak Signal Voltage Amplifier Secondary Operational Amplifier Board Module Single Power Signal Collector 3.5-24V by hiletgo - **How much does it cost?** € 20.63 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/470876258-hiletgo-4pcs-lm358-weak-signal-voltage-amplifier-secondary-operational-amplifier) ## Best For - hiletgo enthusiasts ## Why This Product - Trusted hiletgo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact Yet Mighty:** Small footprint (45.3mm x 16.2mm) fits effortlessly into any setup. - • **Custom Gain Control:** Two onboard potentiometers let you dial in exact amplification levels. - • **Quad Pack for Quad Projects:** Four amplifier boards included—scale your signal game instantly. - • **Amplify the Almost Invisible:** Boost millivolt-level signals up to 2000x with dual-stage precision. - • **Power Flexibility at Your Fingertips:** Operates seamlessly from 3.5V to 24V DC to fit diverse projects. ## Overview The HiLetgo LM358 amplifier board is a compact, dual-stage operational amplifier module designed to amplify weak DC signals from millivolts to much higher levels with adjustable gain via two potentiometers. It supports a wide DC power supply range (3.5-24V), outputs up to 15-20mA current, and comes in a convenient 4-pack, making it ideal for professional and hobbyist signal amplification needs. ## Description Description: LM358 is the core two-stage operational amplifier, which can amplify DC weak signals, such as DC voltage signals, DC pulse signals, can amplify signals of millivolts or even weaker, and has two potentiometers, respectively for the first stage and The second stage performs single-stage magnification adjustment, but the total magnification is the product of the two-stage multiple, so the magnification will be adjusted to a large extent. If the first level is adjusted to 20 times magnification, then if the second level is adjusted to 100 times, then the total magnification is 2000 times. Note: the default of this LM358 Amplifier is 1000 times. Parameters: 1. Power supply voltage: 3.5-24V DC power supply 2. Current output: maximum 15-20MA (non-linear) 3. Voltage output: output = input voltage signal * magnification 4. Magnification: Total multiple = first multiple multiple * second multiple multiple 5. Board size: length 45.3mm width 16.2mm 6. The two potentiometers on the board are rotated counterclockwise to increase the multiple. Package included: 4* LM358 Weak Signal Amplifier Boards Review: Low signal amplifier. - The amplifier worked as expected. I'm very satisfied. Review: I wish I had a schematic or spec sheet - It seems to have a lowpass filter in it at 1800 hz. I didn’t know that and my signal is 3000 hz 🙁.The chip can run all the way to 10khz easy. So now I have to pick capacitors off the board or find a simple linear small signal amp somewhere else😕. Not 100% sure what makes the blue led come on. Simple 5/Gnd doesn’t make it come on until a signal is connected ## Features - LM358 Weak Signal Amplifier Voltage Amplifier 3.5-24V DC - LM358 is the core two-stage operational amplifier, which can amplify DC weak signals. - Two potentiometers on the board are rotated counterclockwise to increase the multiple. - It amplify signals of millivolts or even weaker, and has two potentiometers to be rotated counterclockwise to increase the multiple. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09KGW36Q8 | | Best Sellers Rank | #78,131 in Electronics ( See Top 100 in Electronics ) #474 in Audio Component Amplifiers | | Brand | HiLetgo | | Brand Name | HiLetgo | | Customer Reviews | 4.0 out of 5 stars 13 Reviews | | Manufacturer | HiLetgo | | Maximum Supply Voltage | 24 Volts (DC) | | Minimum Supply Voltage | 3.5 Volts (DC) | | Model | LM358 | | Mounting Type | Surface Mount | | Number of Channels | 4 | | Package Type Name | box" or "padded envelope | | Part Number | 3-01-1718 | | Specification Met | [Possibly] Fcc | | Unit Count | 4.0 Count | | Voltage | 24 Volts | ## Product Details - **Voltage:** 24 Volts - **Manufacturer:** HiLetgo - **Maximum Supply Voltage:** 24 Volts (DC) - **Minimum Supply Voltage:** 3.5 Volts (DC) - **Mounting Type:** Surface Mount ## Images ![HiLetgo 4pcs LM358 Weak Signal Voltage Amplifier Secondary Operational Amplifier Board Module Single Power Signal Collector 3.5-24V - Image 1](https://m.media-amazon.com/images/I/61fnkLaST9L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Low signal amplifier. *by R***Z on August 19, 2025* The amplifier worked as expected. I'm very satisfied. ### ⭐⭐⭐⭐ I wish I had a schematic or spec sheet *by D***. on October 22, 2022* It seems to have a lowpass filter in it at 1800 hz. I didn’t know that and my signal is 3000 hz 🙁.The chip can run all the way to 10khz easy. So now I have to pick capacitors off the board or find a simple linear small signal amp somewhere else😕. Not 100% sure what makes the blue led come on. Simple 5/Gnd doesn’t make it come on until a signal is connected --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/470876258-hiletgo-4pcs-lm358-weak-signal-voltage-amplifier-secondary-operational-amplifier](https://www.desertcart.gr/products/470876258-hiletgo-4pcs-lm358-weak-signal-voltage-amplifier-secondary-operational-amplifier) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-07-19*