Internet PLC Forum

General => Technical support => Topic started by: rosssyscon on September 10, 2003, 04:45:06 AM

Title: LCD Current Limiting Resistor
Post by: rosssyscon on September 10, 2003, 04:45:06 AM

We are using a 4x20 LCD display. I noticed that the 150 Ohm resistor is getting REAL :o HOT. It will burn your finger to the touch. The resistor lead is screwed under terminal 15 and the other soldered to the power wire.

Should the resitor be attached to a metal surface with some heat sink compund? ???

Thanks again,

Title: Re: LCD Current Limiting Resistor
Post by: support on September 10, 2003, 11:06:37 AM

The 150 ohm resistor is 5W in ratings. It is meant to be HOT! Anyway, if you can connect it in contact with some metal surface to help carry away the heat it is always appreciated! Otherwise, just good air flow will be sufficient.

Title: Re: LCD Current Limiting Resistor
Post by: rosssyscon on September 10, 2003, 11:47:12 AM

;D Thanks for confirming.