Typically, implementing and testing even a small circuit requires an elaborate setup that includes breadboards, a dual DC power supply, hookup wires, ICs and resistors of different values. This setup can be quite messy and difficult to clean up at the end of the experiment. Also, the power supply can make the setup non portable. Here we present a mobile electronic workbench that makes it easier for you to assemble and test circuits.
This mobile workbench is useful for students in schools, colleges, research institutions and industries alike. It can be used conveniently wherever you want. It is also cost-effective and very useful for giving demos. As the power is supplied by the batteries, the voltage is noise-free. Fig. 1 shows the circuit of the mobile electronic workbench. Two low-drop-out (LDO) regulators (one positive and the other negative) are used here to provide regulated +5V and -5V for digital ICs. When switch S1 is pushed to ‘on’ position, LEDs indicate the availability of voltages on the breadboard. When it is in ‘off’ position, the battery terminals connect to the sockets for charging the batteries. Apart from +6V and +5V supplies, you can also have a 12V source between +6V and -6V terminals. As shown in Fig. 2, the mobile workbench consists of a big melamine tray. At the centre of this tray, mount the breadboard. On the sides of the breadboard, stick two 6V, 4.5Ah maintenance-free lead-acid batteries (Batt.1 and Batt.2). On a wooden batten, mount two-pole, two-way toggle switch S1 and two fuses and two sockets symmetrically. Mount LED1 and LED2 on the sides of S1. If you do not want this mobile workbench on a breadboard, you can assemble it on a general-purpose PCB and enclose in a suitable cabinet. Fix LEDs and switch S1 on the front panel of the cabinet and the fuses at the back side of the box.
In place of LM2990-5, you can use a 5.1V, 2W zener diode with 100- ohm, 2W series limiting resistor
as shown in Fig. 3. During testing, we used a zener diode for negative 5V regulation instead of LM2990-5.
This is How it LOOKS:-
- By Abhijeet Deshpande
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mgudvu ra sulgaa
ReplyDeletei didn't understand >>> Can you comment in English...
ReplyDeletecan u tell how does it works ? please urgent
ReplyDeletei think i have pretty clearly quoted above.
ReplyDeleteIt smile a kit to perform experiment . Likely a assembly of breadboard, wires, battery etc
do you have any documentation for this project ?? can u tell me applications ? and uses of this ? is this a simulation project ? please reply urgent i have to give project on monday?
ReplyDeletejust put info about each and everything on documentation likely datasheets of
ReplyDeleteIC LM2940 here is link http://adf.ly/2me5Y
IC LM 2990 http://adf.ly/2me97.
its an portable instrument . by which we can perform exp. Just put the IC on breadboard .make connection from connecting wire . as there is everything connected to breadboard likely battery, on off switch etc.
ReplyDeleteOn the Kit and perform the Exp.
"it just a Home made version of breadboard box available in market"
can u give me the project report of this ?
ReplyDeleteokkay ... i will send it...
ReplyDeletesorry vaibhav to hurry you up can i know untill when u will send it , bcoz i have to submit it by march 1st and my email address is kumar2dumbu@gmail.com
ReplyDelete