Category Archives: Analog Circuits
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[TC] Physicists just built the world’s smallest optical switch – based on a single atom
3February 7, 2016 by MrJSY
As our need for more data and faster transmissions grows, existing network infrastructure is being put under more strain than …
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[TC] Heart rate monitor using 8051
4June 26, 2014 by MrJSY
This article is about a simple heart rate monitor using 8051 microcontroller. Like the previous 8051 projects, AT89S51 is the …
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[TC] Building an analog meter clock with Atmel and Adafruit
Leave a commentOctober 18, 2013 by MrJSY
“We wanted to design a microcontroller board that was small enough to fit into any project – and low cost …
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Jet engine sound generator
Leave a commentAugust 9, 2013 by todayscircuits
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CPU Monitoring Circuit
Leave a commentJanuary 14, 2012 by todayscircuits
Excess heat too much can cause damage to the electronics. Similarly, on a computer or laptop, so monitor the temperature of CPU …
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Rain Detector Circuit
Leave a commentNovember 7, 2011 by todayscircuits
This circuit uses a sensor made of a small piece of etched PC board and a simple SCR circuit to …
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Leaked Gas Detector
2September 16, 2011 by todayscircuits
Description:As shown by the gas sensor alarm QM, buck rectifier and regulator circuits, integrated circuits KD28, speaker Y and so …
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AC Powered Blinking LED
Leave a commentAugust 31, 2011 by todayscircuits
I needed a pulsating light for a certain signaling. Voltage was 230V. So I decided to make a simple circuit, …
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Fridge Door Open Alarm
Leave a commentAugust 31, 2011 by todayscircuits
It beeps if the fridge door is left open for too long or hasn’t closed properly, to stop food from …
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