Kanpur - A city of many resources but politically neglected

Thursday, January 27, 2011

Ready with mine hand made MAX232,to be added with GPS and serial to USB convertor.

So for my project i am ready with a handmade MAX232 circuit.

One more step close to my project but still very far away

Some information regarding MAX232 from its datasheet.
Meet or Exceed TIA/EIA-232-F and ITU
Recommendation V.28
􀀀 Operate With Single 5-V Power Supply
􀀀 Operate Up to 120 kbit/s
􀀀 Two Drivers and Two Receivers
􀀀 ±30-V Input Levels
􀀀 Low Supply Current . . . 8 mA Typical
􀀀 Designed to be Interchangeable With
Maxim MAX232
􀀀 ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
􀀀 Applications
TIA/EIA-232-F
Battery-Powered Systems
Terminals
Modems
Computers

As RS232 is such a common protocol there is a dedicated IC designed for this purpose of "Level Conversion". This IC is MAX232 from Maxim. By using charge pumps it generates high voltages(12V) and negative voltages(-12V).

Things you need

S.No
Item
Value
Qty
1
1
2
Capacitors
10uF
4
3

1
4
DB9 Female Connector
1
5
General Purpose PCB
1
6
Some Wires
-
-

and a little bit of soildering practice.