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New Circuit Projects

IC LM7912, -12V Negative Voltage Regulator Explained

Last Updated on April 25, 2025 by Swagatam Leave a Comment

In this post we are going to learn about one super old but gold IC called LM7912 or simply IC 7912. This one is not positive regulator like 7805 or 7812, but it is negative regulator which means it gives -12V output and not +12V. If you are making op-amp circuits or dual power supply […]

Filed Under: Datasheets and Components

AMS1117 1A LDO Voltage Regulator IC – 3.3V, 1.8V, 2.5V, 5V Regulators

Last Updated on April 25, 2025 by Swagatam 1 Comment

In this post I will be talking about one famous voltage regulator IC called AMS1117. It is a 1 Amp Low Dropout (LDO) Linear Voltage Regulator and we can get it in both fixed output types and also adjustable output version. It is super small, easy to use and available in SOT-223 package mostly, which […]

Filed Under: Datasheets and Components, Voltage Control and Protection

Single Ended nOOds, 300mm long Flexible LED Filament, Warm White 3V

Last Updated on April 23, 2025 by Swagatam Leave a Comment

So here we are talking about this cool looking thing called Single Ended nOOds, basically it is a type of flexible LED filament which is 300mm long which means around 30 cm, like one standard scale. It glows in warm white color and works nicely with just 3V DC. What is it, actually? This LED […]

Filed Under: Lamps and Lights

ISD1820 Voice Recording IC Datasheet, Circuit Diagram

Last Updated on April 16, 2025 by Swagatam Leave a Comment

The ISD1820 is a voice IC that lets us record voice from a mic and play it back using simple buttons or microcontroller. We can record between 8 to 20 seconds which depends on how we set it. This IC is used in small voice projects, talking toys, greeting circuits, voice alerts, and more. ISD1820 […]

Filed Under: Audio and Amplifier Projects

Programmable 35238-MP Timer Module? How to Use it

Last Updated on April 19, 2025 by Swagatam 2 Comments

So this 35238-MP Multi-Function Timer module is an digital adjustable programmable timer which we can use it for doing time-based automation things. Inside it, there is a microprocessor that watches time very closely and makes the relay turn ON or OFF after a set time. So this thing is good when we want to turn […]

Filed Under: Timer and Delay Relay

What is ISD1820 Module? How to Connect and Use

Last Updated on April 15, 2025 by Swagatam Leave a Comment

The ISD1820 is a small ready-made module which can record human voice for short time and then play it back. It is based on the ISD1820 IC which is a voice record and playback chip. This module is very popular for DIY projects where we want to make some talking gadget or voice-alarm,or greeting system, […]

Filed Under: Audio and Amplifier Projects

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