Circuits DIY https://www.circuitsdiy.com Electronics & Embedded System news, tips and tutotials Tue, 03 Jun 2025 13:28:48 +0000 en-US hourly 1 https://wordpress.org/?v=6.8.5 https://www.circuitsdiy.com/wp-content/uploads/2017/01/cropped-CD_logo-150x150.png Circuits DIY https://www.circuitsdiy.com 32 32 Simple contactless water level indicator project https://www.circuitsdiy.com/contactless-water-level-indicator/ https://www.circuitsdiy.com/contactless-water-level-indicator/#comments Wed, 15 Apr 2020 17:55:58 +0000 https://www.circuitsdiy.com/?p=2687 Water level indicator is a very easy electronics project. Water tank overflow as well as tank exhausting without any previous clue is a common household issue which we have to…

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]]> https://www.circuitsdiy.com/contactless-water-level-indicator/feed/ 4 Repair TP-Link TL-WR740N Router WAN port https://www.circuitsdiy.com/repair-wan-port-of-tp-link-router/ https://www.circuitsdiy.com/repair-wan-port-of-tp-link-router/#comments Fri, 10 Apr 2020 11:18:17 +0000 https://www.circuitsdiy.com/?p=2679 This article describes how I repaired my router which had burnt WAN port at no cost.

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]]> https://www.circuitsdiy.com/repair-wan-port-of-tp-link-router/feed/ 2 Reduce Refrigerator bills with this Simple circuit https://www.circuitsdiy.com/reduce-refrigerator-bills/ https://www.circuitsdiy.com/reduce-refrigerator-bills/#comments Tue, 07 Apr 2020 16:06:24 +0000 https://www.circuitsdiy.com/?p=2650 Refrigerator is a common household electrical appliance. When we buy refrigerator we try to minimize the electrical power consumption by looking for BEE 4 or 5 star rated ones which…

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]]> https://www.circuitsdiy.com/reduce-refrigerator-bills/feed/ 4 Simplest shortwave transmitter circuit ever https://www.circuitsdiy.com/simple-shortwave-transmitter-circuit/ https://www.circuitsdiy.com/simple-shortwave-transmitter-circuit/#comments Tue, 31 Jan 2017 13:35:26 +0000 https://www.circuitsdiy.com/?p=2314 So, if you’re looking for the the simplest and cheapest shortwave transmitter circuit, it’s here. This transmitter is very low power and very stable as well, uses a readily available…

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]]> https://www.circuitsdiy.com/simple-shortwave-transmitter-circuit/feed/ 18 How to accurately measure low resistance with cheap Multimeter https://www.circuitsdiy.com/low-resistance-measurement-method/ https://www.circuitsdiy.com/low-resistance-measurement-method/#comments Sun, 29 Jan 2017 12:26:32 +0000 https://www.circuitsdiy.com/?p=2316 We often need some low value resistors, less than 1 Ohm. Mostly as current sensing resistors in power electronics projects. You can’t measure less then 1 Ohm with cheap multimeters.…

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]]> https://www.circuitsdiy.com/low-resistance-measurement-method/feed/ 1 LM317 constant current source circuit design https://www.circuitsdiy.com/lm317-constant-current-source/ https://www.circuitsdiy.com/lm317-constant-current-source/#comments Thu, 26 Jan 2017 18:21:17 +0000 https://www.circuitsdiy.com/?p=2284 A constant current source source can supply a fixed current to a load regardless of input voltage or load change. LM317 constant current source is one of the simplest design.…

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]]> https://www.circuitsdiy.com/lm317-constant-current-source/feed/ 8 Directly Drive LED array from 230V AC https://www.circuitsdiy.com/directly-drive-led-array-230v-ac/ https://www.circuitsdiy.com/directly-drive-led-array-230v-ac/#comments Tue, 24 Jan 2017 04:52:56 +0000 https://www.circuitsdiy.com/?p=2289 LEDs are DC devices, operating from a few volts of direct current. Where power is supplied by a DC battery like mobile phone, or torch, you can easily run LEDs.…

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]]> https://www.circuitsdiy.com/directly-drive-led-array-230v-ac/feed/ 16 What is dielectric resonator oscillator and it’s application https://www.circuitsdiy.com/dielectric-resonator-oscillator/ https://www.circuitsdiy.com/dielectric-resonator-oscillator/#comments Mon, 23 Jan 2017 06:09:56 +0000 https://www.circuitsdiy.com/?p=2232 A dielectric resonator oscillator is basically a high frequency oscillator, operates within a range of few tens of gigahertz. The main frequency determining component is piece of dielectric material, usually…

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]]> https://www.circuitsdiy.com/dielectric-resonator-oscillator/feed/ 3 HH004F LED driver circuit https://www.circuitsdiy.com/hh004f-led-driver-circuit/ https://www.circuitsdiy.com/hh004f-led-driver-circuit/#comments Sat, 21 Jan 2017 10:16:01 +0000 https://www.circuitsdiy.com/?p=2263 HH004F is a low power integrated boost converter IC in a TO-92 package, look exactly like a small transistor. Though it’s quite a uncommon and undocumented IC, but you may…

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]]> https://www.circuitsdiy.com/hh004f-led-driver-circuit/feed/ 8 Free PCB design software – Ultimate list of 2018 https://www.circuitsdiy.com/best-free-pcb-design-software-list/ https://www.circuitsdiy.com/best-free-pcb-design-software-list/#comments Fri, 20 Jan 2017 11:10:07 +0000 https://www.circuitsdiy.com/?p=2094 There’s no short of free PCB design software to get your very own PCB ready. But which one should you choose ? Each of them have a fairly time consuming…

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