delabs Circuits

Sunday, June 22, 2014

RS485-modbus

I am working on alarm systems and would like assistance in designing wireless link for the unit, ie sensors to control panel, control panel to monitoring station.

I noticed most of the circuits available on your sites are FM 88 - 108 MHz, which would definitely cause interference. Can you please assist me with this final part of my system.

mail from RT

i would like to know........... The wireless link distance of Transmitter and receiver. The frequency range you want like FM 'n' MHz Are you aware of the regulations of wireless transmission.

What band is allowed in your country and what distance. what type of data needs to be transmitted. If this is for process control, RF should be avoided if possible. You should use 4-20mA current loops, RS485 or IR optics.

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You can study these pages ...........

Wireless Transceiver with Modbus Interface at Omega 

Omega Modbus Wireless Transceiver

"The OMWT-XREC-MOD Wireless Transceiver uses an embedded 100-milliwatt frequency hopping wireless modem that provides communication between a local RS-485 network and a remote network of RS-485 connected devices. The OMWT-XREC- MOD will automatically sense the direction of data flow and switch the RS-485 and radio devices accordingly."

Read more here Modbus Communication Protocol Suite

with a RS485 and Modbus Network you can do it.

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Thursday, June 19, 2014

Electronics Work Bench

How can I get a software for an electronics work bench for my pc.

mail from EA

I did not understand about the 'electronics work bench' pc based instruments are made by National Instruments see links in my electronics orange pages. try to look with Picotech and Atcweb for low cost solutions.

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TINA is a powerful yet affordable circuit simulator for analog spice circuit simulation, digital and mixed circuit simulation/



this may be what you want....i am not sure.....have a look. "Tina Pro - The Complete Electronics Lab Edison - Multimedia Lab for Exploring Electronics" ...   also CircuitMaker which you may know.

CircuitMaker Student Edition

Ssimulation program.... helpful for learning about circuits, testing designs or analyses, and even just drawing schematics for reports.

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Friday, June 13, 2014

Soldering Iron Tip

Can I use stainless steel to replace a defective soldering iron tip?

mail from EA

Soldering iron tips are mostly alloys of copper. the thermal conductivity of steel is poor. buy a soldering iron tip available in the local market.

Soldering Iron Tip

Soldering Iron Tips 60 Watt

Weller tips are magnetic and only original weller tips to be used.

Change Weller ET Series Soldering Tips

Change Weller ET Series Soldering Tips


Changing the soldering tips on a PES51 pencil is very simple. You just have to make sure to take your time and don't force anything. Damaging your iron is not only possible, but easy when replacing the tips, so proceed with care.

The Basic Electronics Soldering & Desoldering Guide

The Basic Soldering Guide contains everything the beginner needs to solder electronics successfully, with guidance on choosing the right soldering iron, details of various solders and fluxes,

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