title
Page 1 of 2
Home | About Us | Sitemap
Enter Keyword to Search Product
Custom Design
Find A Distributor
Online Specials
Contact Us
Shopping Cart
Product Details
Prototyping Boards
PCI Express Products
CompactPCI Products
VME / VME64x / VPX Products
PMC Products
FPGA Development Boards
PCI Products
TW-DIY-5002
CIRCUIT DESCRIPTION The potential difference (PD) across a silicon diode is dependent on its
temperature and current through it. Its temperature coefficient is negative, that is, the voltage falls with
increasing temperature. This fall is approximately linear and is typically -2.2mV/oC. That is, there is the
same drop in voltage when the diode cools from 88 oC to 87 oC as there is when it cools from 23 oC to
22 oC. Better sensors have better linear characteristics. In this Kit we have used a transistor as a diode
(base and collector shorted together) which has a more linear temperature response over a bigger range
than a diode does. The temperature meter measures the PD across the diode after an offset voltage
which is available from pins 1 and 32 of the 7106 has been added. The two 100K 10-turn trimpots are
used to calibrate the sensor at two known temperatures. The calibration is easily done using water with
ice in it to calibrate zero degrees Centigrade and putting the sensor in a jet of steam from a boiling water
kettle to calibrate for 100 oC. The decimal point has been hard-wired on. (The enclosed literature shows
you circuits of how to obtain a variable decimal point.)
Temperature Meter Kit - DIY
SMT & BGA Adapters
This Kit shows how much of electronics
today can be contained in a single chip, the
Intersil 7106. Commercial low cost digital volt
meters are nothing more than this kit, some
switches and passive components and a nice
plastic case.
ExpressCard / PCMCIA / SD
ISA Products
Data Acquisition Products
Do It Yourself (DIY) Solder Kits
• COMPONENTS
Project Boxes+Protoboards
Resistors 1% metal film:
Lead Free Prototyping Products
1M brown black black yellow 2
22K red red black red 1
47K yellow violet black red 1
100K brown black black orange 3
220K red red black orange 1
Capacitors:
100p 101 monoblok 1
zoom photo
220n 224 metallized 1
10n 103 mylar 1
100n 104 mylar 1
470n 474 metallized 1
BC547 or BC548 2
10 turn trimpot 2
40 pin IC socket 3
7106 IC 1
hookup wire
9V battery snap 1
Box #2 and screws 1
LCD VI302-DP-RC 1
Kit 2 PCB 1"
http://twinind.com/catalog_detail.php?id=233
5/14/2012
很抱歉,暂时无法提供与“TW-DIY-5002”相匹配的价格&库存,您可以联系我们找货
免费人工找货