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BadOscer
03-23-2010, 11:25 AM
Background:
I'm doing a test project for a voice controlled home automation system, using visual basic and the Basic Stamp2. Everything is working great until I get to
my proposed heating system. The heating system is just heater hooked up to a proportional power controller (like a relay but adjusts current based on an input signal) The proportional power controller works fine. The controllers analogue input is to be controlled by the stamp through a MAX 518 digital to analogue converter (which is outputting 5V at 100%) My original plan was to have the MAX 518 output sent through an op-amp with a gain of two.

Problem:
It doesn't work....nothing much more to say

Question:
Does anyone know of a good way to double the voltage of an analogue signal from the stamp? better yet the MAX 518? I don't care what I would have to buy as long as it is accessible. I used op-amps before but my experience was with instrumentation amplifiers, can any one tell me how they would design the circuit with an op-amp?

Any help is greatly appreciated, thanks

--anyone see the season premier of Breaking Bad??--

BadOscer
03-23-2010, 11:28 AM
Forgot to mention that the proportional power controller requires an input of 2-10V DC. So that is what I need the stamp to control some way. Is it possible to have two MAX 518 and add their Voltages together? hmmm

Leon
03-23-2010, 02:22 PM
focus.ti.com.cn/cn/lit/an/slod006b/slod006b.pdf (http://focus.ti.com.cn/cn/lit/an/slod006b/slod006b.pdf)

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Leon Heller
Amateur radio callsign: G1HSM