--- product_id: 41227377 title: "5 PCS Optocoupler Isolation Board, Icstation DC 12V Optocoupler Isolation Module EL817 1 Channel Opto PNP NPN Signal Converter, Isolator High-Level Trigger 80KHz" brand: "is" price: "3829 kr" currency: ISK in_stock: true reviews_count: 11 category: "Is" url: https://www.desertcart.is/products/41227377-5-pcs-optocoupler-isolation-board-icstation-dc-12v-optocoupler-isolation store_origin: IS region: Iceland --- # 12V DC stable trigger 80KHz high-level switching Optical isolation for safety 5 PCS Optocoupler Isolation Board, Icstation DC 12V Optocoupler Isolation Module EL817 1 Channel Opto PNP NPN Signal Converter, Isolator High-Level Trigger 80KHz **Brand:** is **Price:** 3829 kr **Availability:** ✅ In Stock ## Summary > ⚡ Power up your projects with precision isolation and speed! ## Quick Answers - **What is this?** 5 PCS Optocoupler Isolation Board, Icstation DC 12V Optocoupler Isolation Module EL817 1 Channel Opto PNP NPN Signal Converter, Isolator High-Level Trigger 80KHz by is - **How much does it cost?** 3829 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/41227377-5-pcs-optocoupler-isolation-board-icstation-dc-12v-optocoupler-isolation) ## Best For - is enthusiasts ## Why This Product - Trusted is brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & PCB-Ready:** Space-saving 1.1x0.59 inch design fits perfectly into any custom build. - • **Robust Optical Isolation:** Protects sensitive electronics by isolating low and high voltage circuits. - • **High-Speed 80KHz Switching:** Handles rapid signal changes to keep your projects lightning-fast. - • **Seamless 12V DC Activation:** Reliable trigger with just 1mA current for ultra-efficient control. - • **Universal Level Conversion:** Effortlessly converts NPN to PNP signals, perfect for MCU interfacing. ## Overview The 5 PCS Optocoupler Isolation Board by Icstation features 1-channel EL817 modules designed for stable 12V DC triggering with minimal current. Operating at up to 80KHz, these boards provide optical isolation between low and high voltage circuits, ensuring safe and noise-free signal conversion. Ideal for microcontroller input/output switching, power control, and communication equipment protection, this compact PCB-mount module is a must-have for professional-grade electronics projects. ## Description 5 PCS Optocoupler Isolation Board, Icstation DC 12V Optocoupler Isolation Module EL817 1 Channel Opto PNP NPN Signal Converter, Isolator High-Level Trigger 80KHz: desertcart.com: Industrial & Scientific Review: Works happily on 5V - I have been working on building a small desktop CNC and one part I had some issues with was electrical noise interfering with my end stop switches. A common way to deal with this is to use an optocoupler and this one fit the bill perfectly. These boards are cheap, easy to use, and give you a lot of flexibility with how you want to wire up your machine. In my case, I am using a set of KY-003 hall effect sensor modules (Also sold on desertcart by DAOKI) which are powered by 5v. When activated, they pull the output pin to ground. I was able to easily wire one of these into the optocoupler board and use a small pullup resistor to make sure the isolator received full voltage ranges. The output of these isolators was pretty easy to hook up to the Shapeoko motor control board I'm using. Over all, these boards are pretty good and are well worth the small cost compared to the cost of breaking more end mills or a failed machining operation. Review: Works well for hooking 24 VAC HVAC signals to Arduino - I'm using this to interface 24 VAC HVAC signals (Fan, Compressor, Reverser, Alt Heat, etc) to an Arduino (actually an ESP32) board. I used the 24-to-5 volt board here, but wired the output side with 3.3 volts off the ESP32 board and it works fine. Be aware that if your input signal is AC then the output side will be 60 Hz pulsing DC, so you'll have to deal with that somehow. I imagine I could put some filter capacitors on the output side but I'm actually handling it in software. I'm very pleased with this board as it's helped me find a problem with my heat pump (compressor short-cycling in colder temperatures caused by the low refrigerant pressure switch triggering) without me having to sit outside all night waiting for it to happen. ## Features - 【Relay Switch Module】5pcs 1-channel photocoupler isolator with stable performance, triggered by DC 12V and 1mA current. - 【Signal Voltage】Positive phase amplification with high-level trigger. Output equals input. - 【Level Converter】Opto-isolators can be used as level converters (NPN-PNP, PNP-NPN), signal input to MCU in isolation, or MCU-controlled device output in isolation. - 【Control Transformer】Optocoupler isolation board provide isolation between low and high-voltage circuits when used with other electronic devices. - 【Functional Application】Devices for microprocessor Input/Output switching, DC/AC power control, communications equipment protection, and power supply regulation. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01L1OI1HC | | Best Sellers Rank | #63,471 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #88 in Signal Converters | | Brand | IS | | Date First Available | August 26, 2016 | | Interface Type | Optical | | Is Discontinued By Manufacturer | No | | Item Weight | 0.353 ounces | | Item model number | EL817 1CH Optocoupler Isolation Board | | Manufacturer | Icstation | | Material | Copper | | Maximum Supply Voltage | 12 Volts (DC) | | Minimum Supply Voltage | 12 Volts (DC) | | Mounting Type | PCB Mount | | Number of Channels | 1 | | Number of Pins | 26 | | Product Dimensions | 1.1 x 0.59 x 0.55 inches | ## Product Details - **Brand:** IS - **Maximum Supply Voltage:** 12 Volts (DC) - **Minimum Supply Voltage:** 12 Volts (DC) - **Mounting Type:** PCB Mount - **Number of Pins:** 26 ## Images ![5 PCS Optocoupler Isolation Board, Icstation DC 12V Optocoupler Isolation Module EL817 1 Channel Opto PNP NPN Signal Converter, Isolator High-Level Trigger 80KHz - Image 1](https://m.media-amazon.com/images/I/71VK5PrxhkL.jpg) ## Questions & Answers **Q: can i get this board 3.3vdc in and 24vdc out?** A: I don’t think this board can be run backwards to generate 24 vac. There’s an opto-coupler in the circuit with the transmit side connected to the 24vac inputs. Going the opposite direction is theoretically possible but would require a different board **Q: Anyone know a way to crisp the output for higher frequency? at ~4kHz there's a fairly significant rise/drop time that's increasing Vrms about 20~30%** A: You would need to reduce the resistance of the output "pullup" resistor. You could do this by soldering a lower value resistor in parallel with the output pullup resistor. This would be challenging for the average person to do since the pullup resistor is a very small surface mount chip. **Q: Any way to get the common anode configuration (where high in is high out) without sharing the anodes? i don't want in to share power or ground.** A: If you connect your source voltage to the 1+ input and connect your input signal to 1- then the output signal O1 will be "high" (VCC) when your input signal is high. But if you connect your input signal to 1+ and your input side GND to 1- then the output signal O1 will be "low" when your input signal on 1+ is high. **Q: What exactly does this do for me? What kind of signal will it boost??** A: It isolates the input circuit from the output circuit and changes voltage levels from input to output. Depending on how you connect to the input ,it can function as an inverter or a simple buffer with voltage translation. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works happily on 5V *by A***R on October 23, 2020* I have been working on building a small desktop CNC and one part I had some issues with was electrical noise interfering with my end stop switches. A common way to deal with this is to use an optocoupler and this one fit the bill perfectly. These boards are cheap, easy to use, and give you a lot of flexibility with how you want to wire up your machine. In my case, I am using a set of KY-003 hall effect sensor modules (Also sold on Amazon by DAOKI) which are powered by 5v. When activated, they pull the output pin to ground. I was able to easily wire one of these into the optocoupler board and use a small pullup resistor to make sure the isolator received full voltage ranges. The output of these isolators was pretty easy to hook up to the Shapeoko motor control board I'm using. Over all, these boards are pretty good and are well worth the small cost compared to the cost of breaking more end mills or a failed machining operation. ### ⭐⭐⭐⭐⭐ Works well for hooking 24 VAC HVAC signals to Arduino *by T***O on February 4, 2023* I'm using this to interface 24 VAC HVAC signals (Fan, Compressor, Reverser, Alt Heat, etc) to an Arduino (actually an ESP32) board. I used the 24-to-5 volt board here, but wired the output side with 3.3 volts off the ESP32 board and it works fine. Be aware that if your input signal is AC then the output side will be 60 Hz pulsing DC, so you'll have to deal with that somehow. I imagine I could put some filter capacitors on the output side but I'm actually handling it in software. I'm very pleased with this board as it's helped me find a problem with my heat pump (compressor short-cycling in colder temperatures caused by the low refrigerant pressure switch triggering) without me having to sit outside all night waiting for it to happen. ### ⭐⭐⭐⭐⭐ Interface experiment. *by K***H on July 18, 2025* I bought these to experiment on my boat's tachometer. Tachometer keeps burning up. Very expensive. I am trying to use these as an interface between my pickup coil and the tachometer. The board seems good quality. Time will tell if my experiment works. Ken Beamish ## Frequently Bought Together - 5 PCS Optocoupler Isolation Board, Icstation DC 12V Optocoupler Isolation Module EL817 1 Channel Opto PNP NPN Signal Converter, Isolator High-Level Trigger 80KHz - AEDIKO 4pcs DC 5V Relay Module - 1 Channel Relay Switch Board with Optocoupler Isolation, High or Low Level Trigger - NOYITO 1-Channel PC817 Optocoupler Isolation Module Optoelectronic Isolator Signal Isolation and Anti-Interference 3-5V 12V 24V (Pack of 2) (3-5V) --- ## 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.is/products/41227377-5-pcs-optocoupler-isolation-board-icstation-dc-12v-optocoupler-isolation](https://www.desertcart.is/products/41227377-5-pcs-optocoupler-isolation-board-icstation-dc-12v-optocoupler-isolation) --- *Product available on Desertcart Iceland* *Store origin: IS* *Last updated: 2026-04-26*