‘spot An Er­ror’ Award Win­ners

Electronics For You - - LETTERS -

Un­der the Q&A sec­tion of EFY Au­gust is­sue, the an­swer to the ques­tion “What are PLDs and PLAs?” ex­plains PLDs, PALs, CPLDs and FPGAs but not PLAs.

Praveen K., Kal­pakkam, Tamil Nadu In “Which De­vel­op­ment Board to Use for Your Em­bed­ded Project” ar­ti­cle pub­lished in Au­gust is­sue of EFY, on page 80, the text on Mi­crochip’s UNO32 ERDUG VDyV LW KDV 512NB )ODVK DQG 128NB 5A0 (ZKLFK DUH DFWXDOOy VSHFL­fiFD­tions of MAX32) while the com­par­i­son ta­ble, on page 82, shows it has 16kB RAM and 128kB stor­age.

Sh­weta Dhadi­wal , Through e-mail In ‘Touch-Free Timer Switch’ cir­cuit of EFY Au­gust is­sue, on page no. 121, the pin di­a­grams of TSOP1738, IR LED and BC547 are given. Here IR LED is not shown cor­rectly. Its leads are in­ter­changed and also ‘A’ and ‘K’ la­bels are marked wrongly.

Deepesh Verma, Through e-mail In the ar­ti­cle “RFID Tech­nol­ogy: A Com­plete Over­view,” in Fig. 1 on page QR. 100 LW’V ZULWWHQ WKDW “7KH HOHFWULF fiHOG RI SURSDJDWLQJ VLJQDO JLYHV ULVH WR po­ten­tial dif­fer­ence across the tag’s dipole an­tenna, wHICH CAusEs Cur­rENt tO flOw into the ca­pac­i­tor. The re­sult­ing charge is trapped there by the diode.” Here the statePHQW LQ LWDOLFV LV ZURQJ. 7KH FRUUHFW RQH LV “ZKLFK FDXVHV FXUUHQW WR flRZ LQWR the diode. The re­sult­ing charge is trapped there by the ca­pac­i­tor.”

Sid­dharth, Through e-mail QHWLF fiHOGV.

Some of the main ad­van­tages of this wired in­ter­com are the pri­vacy and the se­cu­rity; these two fea­tures are un­avail­able in the low-cost wire­less ap­pli­ca­tions.

Wire­less de­vices are sub­ject to a lot of lo­cal reg­u­la­tions and you should study them care­fully be­fore undertaking any prac­ti­cal ex­per­i­ment. There are a lot of low-power wire­less mod­ules avail­able, which you can check out in the lo­cal elec­tron­ics stores. They will be able to give you some in­for­ma­tion and maybe ap­pli­ca­tion cir­cuits.

The mod­ules avail­able in Europe may not be avail­able or not au­tho­rised in In­dia, or the price can be pro­hib­i­tive.


I am a reg­u­lar reader of EFY Plus. There are only elec­tron­ics de­sign and sim­u­la­tion soft­ware in­cluded in the ac­com­pa­ny­ing DVD. I re­quest you to in­clude telecom­mu­ni­ca­tion re­lated soft­ware tools in the DVD or at least en­list the soft­ware per­tain­ing to telecom­mu­ni­ca­tion. Kazi Yaser Arafat

Os­man­abad EFY: Thank you for your feed­back. :H ZLOO GH­fiQLWHOy WUy WR LQFOXGH WKHVH soft­ware in com­ing is­sues.

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