felis
New Member
Hello,
I've just finished designing a control circuit for the microheater - tiny strip of aluminum which goes linearly from ~200ohms at room temperature to ~450ohms at 200C. The thing works fine; however, since small signal stuff is not exactly my cup of tea I'd like to humbly ask a favor from all of you knowledgeable folks to take a look at it and tell me what you think.
IC1 is a 10bit DAC, IC2 changes DAC range and adds DC offset, IC3 watches the heater. VDD is 5V.
Thank you,
Oleg.
I've just finished designing a control circuit for the microheater - tiny strip of aluminum which goes linearly from ~200ohms at room temperature to ~450ohms at 200C. The thing works fine; however, since small signal stuff is not exactly my cup of tea I'd like to humbly ask a favor from all of you knowledgeable folks to take a look at it and tell me what you think.
IC1 is a 10bit DAC, IC2 changes DAC range and adds DC offset, IC3 watches the heater. VDD is 5V.
Thank you,
Oleg.