# Looking for these things .... Shopping list **URL:** \ **Category:** Product Questions\ **Created:** [21 April 2025 11:45 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281 "2025-04-21T11:45:05Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Andrew41918](https://avatars.discourse-cdn.com/v4/letter/a/a4c791/32.png) [@Andrew41918](https://forum.core-electronics.com.au/u/Andrew41918)\ **Post date:** [21 April 2025 11:45 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/1 "2025-04-21T11:45:05Z")
Folks, I’ve been living under a rock for a while and am just now back. 1: I’ve heard of these _mm wave detectors/sensors_ which are (to my understanding) the next generation of _PIR sensors_. In that they are WAY MORE accurate for distance and less prone to false triggers. (EDIT) Is this the one? > **[mmWave - C4001 24GHz Human Presence Detection Sensor (25 Meters, UART)](https://core-electronics.com.au/mmwave-c4001-24ghz-human-presence-detection-sensor-25-meters-uart.html)** > > The 25-meter millimeter-wave presence sensor is designed for human detection. Features long-distance range, speed measurement, proximity detection, and a... 2: These MOSFET things that convert 3.3v to 5v signal levels. I want to switch a 5v device from a RasPi output. They are 3 connection PCB with a/the MOSFET. Do you sell any of these? Preferably both. 😉 ---
**Author:** ![Jeff105671](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/jeff105671/32/3729_2.png) [@Jeff105671](https://forum.core-electronics.com.au/u/Jeff105671)\ **Post date:** [21 April 2025 20:56 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/2 "2025-04-21T20:56:06Z")
1. Yes - the item that you have linked fits that description. But I don’t know if referring to them as the ‘next generation’ is reasonable. The two types of sensors do slightly different jobs with different results, and each has its own place as a sensor. 2. There are two types of devices that would fit your description. The one you might be talking about is a logic level shifter, where you need to connect the logic signals of two devices but one of them uses 3.3V logic levels (like a Pi) and the other uses 5V logic levels (like a UNO) These are typically bi-directional. [Logic Level Converter Bi-Directional | Buy in Australia | CE07510 | Core Electronics](https://core-electronics.com.au/logic-level-converter-bidirectional.html) The other is a device that enables a module such as a Pi that uses a logic level of 3.3V to operate a device that needs 5V or higher in order to function, such as a relay or lamp. These devices are unidirectional and can handle a range of voltages and higher current than a Pi can manage. [MOSFET Power Switch Module | Buy in Australia | CE09733 | Core Electronics](https://core-electronics.com.au/mosfet-power-switch-module.html) ---
**Author:** ![Andrew41918](https://avatars.discourse-cdn.com/v4/letter/a/a4c791/32.png) [@Andrew41918](https://forum.core-electronics.com.au/u/Andrew41918)\ **Post date:** [21 April 2025 21:58 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/3 "2025-04-21T21:58:25Z")
Thanks @Jeff105671. I was merely repeating what I had read about the sensor. WRT the MOSFET… I only need unidirectional, so I’m guessing the second one should suffice. ---
**Author:** ![Jeff105671](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/jeff105671/32/3729_2.png) [@Jeff105671](https://forum.core-electronics.com.au/u/Jeff105671)\ **Post date:** [21 April 2025 22:03 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/4 "2025-04-21T22:03:17Z")
Bi- or uni-directional is one distinction, but it’s not the important one. The basis for making the selection should be whether the device you are connecting to is expecting to receive a logic signal (such as a UNO) or a higher current control signal (such as a lamp or relay or motor). ---
**Author:** ![Andrew41918](https://avatars.discourse-cdn.com/v4/letter/a/a4c791/32.png) [@Andrew41918](https://forum.core-electronics.com.au/u/Andrew41918)\ **Post date:** [21 April 2025 22:05 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/5 "2025-04-21T22:05:54Z")
Ok, thanks for the clarification there. It is switching a fan/motor. Pi output (3.3v) to 5v on/off motor of fan. That is: I think this is the one I want/need: > **[MOSFET Power Switch Module](https://core-electronics.com.au/mosfet-power-switch-module.html)** > > Add power control to your projects with this MOSFET module. ---
**Author:** ![Liam](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/liam/32/3562_2.png) [@Liam](https://forum.core-electronics.com.au/u/Liam)\ **Post date:** [22 April 2025 02:46 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/6 "2025-04-22T02:46:02Z")
Hi Andrew and Jeff, > [@Jeff105671](#): > > Yes - the item that you have linked fits that description. But I don’t know if referring to them as the ‘next generation’ is reasonable. The two types of sensors do slightly different jobs with different results, and each has its own place as a sensor. Certainly agree, there are great synergies between the two - for the initial detection both sensors could be used for a more reliable result, and mmwave to ensure that a person is still in the space. For switching a fan on and off that MOSFET board will work perfectly. Its been a while since I dabbled in mmWave sensors, but we recently got the Rd-03 modules online: [Rd-03D mmWave Multi-Human Position Sensor | Buy in Australia | CE10172 | Core Electronics](https://core-electronics.com.au/mmwave-sensor-rd03d-presence-detection-sensor.html) They supposedly are some of the best-in-market right now (we are yet to test and confirm - but have seen excellent results from other Makers). Same with the Xiao modules: [24GHz mmWave Sensor for XIAO | Buy in Australia | SS101010001 | Core Electronics](https://core-electronics.com.au/24ghz-mmwave-sensor-for-xiao.html) Liam ---
**Author:** ![Andrew41918](https://avatars.discourse-cdn.com/v4/letter/a/a4c791/32.png) [@Andrew41918](https://forum.core-electronics.com.au/u/Andrew41918)\ **Post date:** [22 April 2025 07:28 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/7 "2025-04-22T07:28:16Z")
Hi @Liam. (Long time) WRT the mmWave board: This is for indoor use so when I get up in the morning and walk into a room, it triggers events. Ok, I’m confused. Three options. CE10172 SS101010001 SEN0609 (Just talking) Problems with them - for now: They are 3.3v. The board I have is a Node MCU thing and I think it is 5v I/O. ☹ The second one (SS101010001) scrolling down they show a bluetooth board. Ok, fair enough. But that then introduces BT into the equation. RasPi 3B+. I see it has BT available. But will it be _COMPATIBLE_? And it would mean another _WALL WART_ plugged in. Though I guess I could run the power lines from … another board with 5V handy but use BT to connect to the network. I’ve never done any coding for BT and am not sure what/how I’m going to do on the RasPi end of things. ---
**Author:** ![Robert93820](https://avatars.discourse-cdn.com/v4/letter/r/ac91a4/32.png) [@Robert93820](https://forum.core-electronics.com.au/u/Robert93820)\ **Post date:** [22 April 2025 07:33 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/8 "2025-04-22T07:33:22Z")
Hi Andrew Just butting in here. > [@Andrew41918](#): > > The second one (SS101010001) scrolling down they show a bluetooth board. > Ok, fair enough. But that then introduces BT into the equation. RasPi 3B+. I see it has BT available. But will it be _COMPATIBLE_? > And it would mean another _WALL WART_ plugged in. My question is why are you concerned by the fact that you have Bluetooth. If you don’t want or need Bluetooth just ignore it. Not doing any harm if you don’t want to use it. Cheers Bob ---
**Author:** ![Andrew41918](https://avatars.discourse-cdn.com/v4/letter/a/a4c791/32.png) [@Andrew41918](https://forum.core-electronics.com.au/u/Andrew41918)\ **Post date:** [22 April 2025 07:36 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/9 "2025-04-22T07:36:28Z")
Well, that board is 3.3v. The existing board I have is 5v. ☹ And I am torn with logic level converters vs. BT. I could _MAYBE_ put it directly on the RasPi. (All 3.3v levels) but where it is, doesn’t have a good _view_ of the room I want it to monitor. ---
**Author:** ![Andrew41918](https://avatars.discourse-cdn.com/v4/letter/a/a4c791/32.png) [@Andrew41918](https://forum.core-electronics.com.au/u/Andrew41918)\ **Post date:** [22 April 2025 07:46 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/10 "2025-04-22T07:46:15Z")
UPDATE! This is the board. (See picture) It actually may be 3.3v. 🙂 ![2025-04-22-174400](https://canada1.discourse-cdn.com/flex028/uploads/core_electronics/original/2X/6/65638cd40244b93cbb7c07fd2b8c89a0fdd51c04.jpeg) ---
**Author:** ![Andrew41918](https://avatars.discourse-cdn.com/v4/letter/a/a4c791/32.png) [@Andrew41918](https://forum.core-electronics.com.au/u/Andrew41918)\ **Post date:** [22 April 2025 07:50 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/11 "2025-04-22T07:50:12Z")
Back to the mmWave board. I could use this to get it talking to my system? > **[HLK-LD2410 24GHz mmWave presence sensor - Tasmota](https://tasmota.github.io/docs/HLK-LD2410/)** > > Documentation (Wiki) for Tasmota As I talk MQTT. I’ll have a read of it and see if I can get the rock (in my head) around how to use it. ---
**Author:** ![Robert93820](https://avatars.discourse-cdn.com/v4/letter/r/ac91a4/32.png) [@Robert93820](https://forum.core-electronics.com.au/u/Robert93820)\ **Post date:** [22 April 2025 07:51 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/12 "2025-04-22T07:51:00Z")
Hi Andrew > [@Andrew41918](#): > > It actually may be 3.3v. I think it is just about time you made sure of exactly what levels are needed where before you see some funny coloured smoke. Cheers Bob ---
**Author:** ![Andrew41918](https://avatars.discourse-cdn.com/v4/letter/a/a4c791/32.png) [@Andrew41918](https://forum.core-electronics.com.au/u/Andrew41918)\ **Post date:** [22 April 2025 07:51 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/13 "2025-04-22T07:51:45Z")
Yeah… That’s why I’m asking about using BT as opposed to hard wired. ---
**Author:** ![Andrew41918](https://avatars.discourse-cdn.com/v4/letter/a/a4c791/32.png) [@Andrew41918](https://forum.core-electronics.com.au/u/Andrew41918)\ **Post date:** [22 April 2025 08:01 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/14 "2025-04-22T08:01:44Z")
Liam, Sorry but the search doesn’t help me. My last post mentions `HLK-LD2410 24GHz mmWave presence sensor` and I’m not sure what’s under the hood of the one you mentioned. (No problems) But when I search for that I get `53` matches on/in Core’s site. And there isn’t really anything I can see to help me refine it any more. So it is a bit confusing. Mind helping me with this? ---
**Author:** ![Jeff105671](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/jeff105671/32/3729_2.png) [@Jeff105671](https://forum.core-electronics.com.au/u/Jeff105671)\ **Post date:** [22 April 2025 09:00 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/15 "2025-04-22T09:00:23Z")
> [@Andrew41918](#): > > it actually may be 3.3v It is an ESP8266 and it definitely is 3.3V. ---
**Author:** ![Andrew41918](https://avatars.discourse-cdn.com/v4/letter/a/a4c791/32.png) [@Andrew41918](https://forum.core-electronics.com.au/u/Andrew41918)\ **Post date:** [22 April 2025 09:18 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/16 "2025-04-22T09:18:57Z")
Ummm… I’m not sure it is. This is the best info I can get/have. ![Screenshot from 2025-04-22 19-13-45](https://canada1.discourse-cdn.com/flex028/uploads/core_electronics/original/2X/0/0a2246ed096d44132d8eb96e2a6b8ace09814fe1.png) So I’m not sure if it is ESP-8266 or ESP-12E. Looking at the _big cockroach_ in/on the picture, it is hard to see and all I could get/see was ESP-12E written on it. And I’m not sure it is Tasmota compatible either. 😭 Oh, the screen shot: That is what I have set to be able to upload to it. Alas my knowledge is somewhat limited in this area. ---
**Author:** ![Jeff105671](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/jeff105671/32/3729_2.png) [@Jeff105671](https://forum.core-electronics.com.au/u/Jeff105671)\ **Post date:** [22 April 2025 11:49 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/17 "2025-04-22T11:49:11Z")
> [@Andrew41918](#): > > So I’m not sure if it is ESP-8266 or ESP-12E. The ESP12E is one model within the ESP8266 range (as the selection menu indicates), so it is 3.3V. ---
**Author:** ![Andrew41918](https://avatars.discourse-cdn.com/v4/letter/a/a4c791/32.png) [@Andrew41918](https://forum.core-electronics.com.au/u/Andrew41918)\ **Post date:** [22 April 2025 11:55 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/18 "2025-04-22T11:55:19Z")
Thanks. So as I have a spare one lying around, I may use it. Just need to check which detector is the best one to use now. Ah, the fun never ends with electronics, huh? 😉 ---
**Author:** ![Jaryd](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/jaryd/32/8778_2.png) [@Jaryd](https://forum.core-electronics.com.au/u/Jaryd)\ **Post date:** [22 April 2025 23:36 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/19 "2025-04-22T23:36:06Z")
Hey @Andrew41918, Another big thing is to check which one has a library/ good documentation to make it easy to use. Currently, I am trying to write one for that [RD-03D board](https://core-electronics.com.au/mmwave-sensor-rd03d-presence-detection-sensor.html) and it is proving to be quite a challenge, lots of math on hexadecimal coming through UART. No promises but if we do get a library written, we will release a guide on it for the Pico with MicroPython and Arduino with C++ (which can be adapted to work on the Pico). We don’t like to say what may lie ahead guide-wise as we don’t want to disappoint, but it was just too good a timing. The other boards may have good libraries out there as well though! ---
**Author:** ![Andrew41918](https://avatars.discourse-cdn.com/v4/letter/a/a4c791/32.png) [@Andrew41918](https://forum.core-electronics.com.au/u/Andrew41918)\ **Post date:** [22 April 2025 23:52 UTC](https://forum.core-electronics.com.au/t/looking-for-these-things-shopping-list/22281/20 "2025-04-22T23:52:03Z")
Thanks. _Luckily_ I am not fixed on using any specific sensor. I used that one as an example and apologise for not making that clearer sooner. That is kind of why I asked about the TASMOTA compatible ones. Core’s search wasn’t helpful when I used it.