--- product_id: 143019495 title: "4-Channel 24V Voltage Comparator Module LM393 Voltage Comparator IC for Automotive Circuit Modification Industrial Equipment Circuit Application Testing" brand: "knacro" price: "0 zł" currency: PLN in_stock: false url: https://www.desertcart.pl/products/143019495-4-channel-24v-voltage-comparator-module-lm393-voltage-comparator-ic store_origin: PL region: Poland --- # 4 precise voltage channels 0.1V ultra-fine resolution Multi-turn potentiometer for exact ref voltage 4-Channel 24V Voltage Comparator Module LM393 Voltage Comparator IC for Automotive Circuit Modification Industrial Equipment Circuit Application Testing **Brand:** knacro **Price:** 0 zł **Availability:** ❌ Out of Stock ## Summary > ⚡ Master your circuits with precision power! ## Quick Answers - **What is this?** 4-Channel 24V Voltage Comparator Module LM393 Voltage Comparator IC for Automotive Circuit Modification Industrial Equipment Circuit Application Testing by knacro - **How much does it cost?** 0 zł with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/143019495-4-channel-24v-voltage-comparator-module-lm393-voltage-comparator-ic) ## Best For - knacro enthusiasts ## Why This Product - Trusted knacro brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Lightweight:** Tiny 0.39-inch footprint fits seamlessly into automotive or industrial setups. - • **Dynamic Relay Switching:** Automatically engage or disengage circuits based on real-time voltage comparisons. - • **Pinpoint Voltage Accuracy:** Experience razor-sharp 0.1V resolution for flawless circuit control. - • **Versatile Voltage Options:** Choose from 5V, 12V, or 24V modules tailored to your project needs. - • **Intuitive Multi-Function Design:** Three distinct operating modes let you customize voltage comparison logic effortlessly. ## Overview The 4-Channel 24V Voltage Comparator Module featuring the LM393 IC delivers ultra-precise voltage comparison with 0.1V resolution across four channels. Designed for automotive, industrial, and experimental applications, it offers three customizable operating modes via a multi-turn potentiometer, enabling dynamic relay control based on input voltage thresholds. Compact and versatile, this module ensures reliable, real-time circuit switching for professional-grade modifications and testing. ## Description Module Name: 1-way Voltage Comparator Module. Operating voltage: DC 12V Typical operating current (relay pull state): DC12V 25mA; Standby current (relay closed): about 5uA; Function description (three functions): Function 1: Input a voltage and set the reference voltage on the module (the reference voltage can be set through the adjustable potentiometer) contrast; When the input voltage is greater than the reference voltage, the relay is closed, the circuit connected; When the input voltage is less than the reference voltage, the relay is disconnected and the circuit is disconnected. Function 2: Respectively inputting two voltage signals A and B to be compared; When the voltage signal A is greater than the voltage signal B, the relay is closed and the circuit is switched on; When the voltage signal A is smaller than the voltage signal B, the relay is opened and the circuit is disconnected. Note: Function 2 requires that the jumper cap of the corresponding channel be unplugged. Function 3: Contrary to function 1, disconnect the jumper cap shown in the diagram and short-circuit the back contact in the diagram. Input a voltage and set the reference voltage on the module (the reference voltage can be set through the adjustable potentiometer) contrast; When the input voltage is less than the reference voltage, the relay is closed, the circuit connected; When the input voltage is greater than the reference voltage, the relay is disconnected and the circuit is disconnected. Reference voltage: The reference voltage of the module is the input voltage after multi-turn precision potentiometer partial pressure obtained, the input voltage value determines the range of reference voltage value. For example, the input voltage is 12V, then the reference voltage adjustable range is 0-12V. ## Features - Channel difference is small, more accurate, 0.1V resolution accuracy. There are three versions of 5V / 12V / 24V optional. - Input a voltage compared with the reference voltage (reference voltage through precision multi-turn potentiometer partial pressure get),the input voltage is greater than the reference voltage, the relay pull, the circuit connected, at the same time the work of the corresponding channel indicator light. - Input a voltage compared with the reference voltage (reference voltage through precision multi-turn potentiometer partial pressure get), the input voltage is less than the reference voltage, the relay pulls, the circuit is connected, at the same time the work of the corresponding channel indicator light. - Function 1: Input voltage and setting voltage between the comparison, the Input voltage is greater than the setting voltage, the circuit is turned on, while the corresponding channel work indicator light; Function 2: Input voltage and setting voltage between the comparison The input voltage is less than the set voltage , the circuit is turned on, while the corresponding channel work indicator light; - Module uses: automotive circuit modification, industrial equipment, experimental testing, circuit application testing. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | KNACRO | | Part Number | 5V | | Item Weight | 0.16 ounces | | Package Dimensions | 0.39 x 0.39 x 0.39 inches | | Is Discontinued By Manufacturer | No | | Batteries Included? | No | | Batteries Required? | No | ## Images ![4-Channel 24V Voltage Comparator Module LM393 Voltage Comparator IC for Automotive Circuit Modification Industrial Equipment Circuit Application Testing - Image 1](https://m.media-amazon.com/images/I/81iFlUJqmUL.jpg) ![4-Channel 24V Voltage Comparator Module LM393 Voltage Comparator IC for Automotive Circuit Modification Industrial Equipment Circuit Application Testing - Image 2](https://m.media-amazon.com/images/I/816yIL6MTgL.jpg) ![4-Channel 24V Voltage Comparator Module LM393 Voltage Comparator IC for Automotive Circuit Modification Industrial Equipment Circuit Application Testing - Image 3](https://m.media-amazon.com/images/I/51YBw5dt0qL.jpg) ![4-Channel 24V Voltage Comparator Module LM393 Voltage Comparator IC for Automotive Circuit Modification Industrial Equipment Circuit Application Testing - Image 4](https://m.media-amazon.com/images/I/51NMuT+JmoL.jpg) ![4-Channel 24V Voltage Comparator Module LM393 Voltage Comparator IC for Automotive Circuit Modification Industrial Equipment Circuit Application Testing - Image 5](https://m.media-amazon.com/images/I/518qG9DtmcL.jpg) --- ## 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.pl/products/143019495-4-channel-24v-voltage-comparator-module-lm393-voltage-comparator-ic](https://www.desertcart.pl/products/143019495-4-channel-24v-voltage-comparator-module-lm393-voltage-comparator-ic) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-08*