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H Bridge inverter power stage with passives
The above circuit I got from replies from edaboard. I had created a thread there on how can I drive a 2 pin primary transformer with H bridge configuration with my SG3524 PWM circuit. I got many...
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Bench PSU made by ARTESYN NLP40-7629J SMPS
Few months ago I ordered ARTESYN – NLP40-7629J – SWITCH MODE POWER SUPPLY from element14. Including shipping and taxes, it took nearly Rs. 3500 (~USD $70) to reach me. Have a look at the SMPS in the...
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USB li-ion charger revision
An year ago, I’ve shared a circuit of USB li-ion charger based on LM358opamp. The circuit had some problems as reported by commentators that inclide wrong direction of LEDs. Features: Charging via...
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Low voltage cutoff circuit for Inverters
Running inverters on battery drains the battery. This decreases the battery voltage. To regulate output voltage and to make it independent(upto a certain level) we use PWM based drivers like the SG3524...
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Usb li-ion charger build
This is the completed PCB of the USB li-ion charger circuit. Link to project page: http://circuitsdiy.com/projects/usb-li-ion-charger Video demo:
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Failed Prototype: VAmeter v3
Just a few days ago the PCBs for VAmeter v3 came in. VAmeter is a simple board that connects to your existing power supply and shows the volatge, current, etc. Upon building, the major fault was...
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USB li-ion charger built by Jamie
Jamie Navarro built a USB li-ion charger on breadboard. Now he is working to get it fine tuned to accurate voltage levels. He scored a free PCB for this. Wish him success this time.
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Happy New year & Intro:BuyCircuitsOnline
We wish all our readers a happy and prosperous new year. We wish to do more experiments/engineering this year. In this new year occasion, a new website is launched from our side. BuyCircuitsOnline....
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Inside a $10 phone
Last week I bought a cheap china phone as my primary phone went to service center for 3 days. It’s this: http://icellmobiles.com/product_detail.php?&getID=133 I got the phone for Rs.500 (~US$8.4)...
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Zero drop dusk to dawn solar charge controller by Sandeep
When you work with solar panels, you don’t just need a panel to supply power, battery to store power and lights to glow, you will always need a good charge controller. The charge controller is a device...
View ArticleMobile charger circuit diagram, 100-220V AC
The market is flooded with cheap mobile charger circuit. Some of you may be looking for this type of charger circuit diagram and components list. These mobile chargers uses only […] The post Mobile...
View ArticleStable miniature FM transmitter circuit
FM transmitter circuit projects are indeed quite popular among electronics hobbyists/students. But the frustrating part is most transmitters refuses to work at all, and secondly the internet is full of...
View ArticleFM transmitter circuit using C9018 transistor
FM transmitter circuit is a quite fun project for electronics beginners, so here’s a circuit with the C9018 transistor. In a previous post I’ve wrote about a stable and simple […] The post FM...
View ArticleFree PCB design software – Ultimate list of 2017
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 […] The post Free PCB design software – Ultimate...
View ArticleHH004F LED driver circuit
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 […] The post HH004F LED...
View ArticleWhat is dielectric resonator oscillator and it’s application
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,...
View ArticleDirectly Drive LED array from 230V AC
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. […] The post Directly Drive LED array...
View ArticleLM317 constant current source circuit design
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. […] The post LM317...
View ArticleHow to accurately measure low resistance with cheap Multimeter
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. […] The post How to...
View ArticleSimplest shortwave transmitter circuit ever
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 […] The post...
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