Low power temperature controller


Posted on Jun 16, 2012

This circuit was built to stabilize a radio frequency VFO (Variable Frequency Oscillator) for ham radio applications. The circuit has also been used to lower the drift of a Ramsey FM10a micropower FM transmitter.


Low power temperature controller
Click here to download the full size of the above Circuit.

The 7805 voltage regulator provides a reference voltage that is fed into a resistive bridge formed on one side by the 20K trimmer and the other side by the 3.3K resistor and the 1K/thermistor combination. The termistor is an NTC (Negative Temperature Coef




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Guitar Effect Bypass Circuit
Advanced Telephone Intercom
FM transmitter with two 2N3904
Fuzz box 3
Single-chip-frequency-doubler
Sample-And-Hold Circuit Ii Circuit
home automation Installation
how to design h bridge circuit for
3 phase ac motor speed control circuit
Protection Circuit For Electrical Appliances From Power Supply Variations PCB
DTMF Proximity Detector
APPLIANCE CONTROL USING TIMER - PROJECT



Top