delabs Schematics - Electronic Circuit

delabs Electronic Circuits Sections

admin — Wed, 08 Jun 2011 08:45:00 +0000

Technologies & Engineering – delabs news. Learn Electronics – Hobby DIY Garage. Source designs & PCB layouts. Analog Circuits -o- Digital Circuits -o- Power Electronics -o- Microcontroller Test Measurement -o- Data Interface -o-...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Millivolt Meter using a LM3914 LED Dot Display

admin — Tue, 18 Jan 2011 15:52:00 +0000

Here is a easy to read ‘Analog’ Millivoltmeter. Just like the Moving Coil Voltmeter, but does not have that resolution. This gives a easy indication of process progress or parameter magnitude from a large distance. A bargraph is easy on...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

555 multivibrator like power oscillator

admin — Thu, 22 Jul 2010 16:09:00 +0000

This is dual 555 multivibrator like power oscillator. This is my contraption and conception but couple of decades old. It appears to have errors. It worked but the document fixing after design worked, not done. This can be used to make a small...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Interface ICL7135 Voltmeter to Atmel 89C52 or PC

admin — Fri, 16 Jul 2010 08:20:00 +0000

This circuit is an interface between 89C52 of Atmel with 7135 of Intersil. With This circuit you can read analog data of both polarities you can change the range scale with extra circuits, you can store data on a EEPROM or send them to PC thru RS232...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Perpetual Candle – White LED Lamp on Ni-Cd

admin — Thu, 15 Oct 2009 13:04:00 +0000

This is a easy to build LED lamp circuit for Learning and building skills. This is the first draft schematic V 1.0. It will need improvements for Higher Power Lighting. From Schematics of delabs I will give a short summary, The LM317 here configured...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Interface a uC to PC RS232 with MAX232A

admin — Thu, 08 Oct 2009 01:56:00 +0000

This is the standard configuration on how to Interface a uC like 8051 to PC RS232 with MAX232A. The UART or Serial port was not present in 8049/8749 chips which were the ancestors of 8051/8031. Pages of code were needed to make a software UART in...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Mains Voltage Stabilizer Circuits

admin — Mon, 08 Jun 2009 07:47:00 +0000

Mains Voltage Stabilizer Circuits These circuits were drawn for a person in Africa. See the thread here… stabilizer circuit. They were not tested by me, but are quite close to a practical design. Stabilizer Step up 230V AC 500VA This circuit...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.