Free Simple Circuit Diagram
This temperature controller employs an LM135/235/335 temperature sensor, can be used to keep small environment warm or hot. Here is the schematic diagram: LM311 is used as comparator, to detect if the voltage at sensor pin (the inverting input) goes higher than the reference pin (the non-inverting pin). If this condition is detected, the comparator will switch off the heater […]
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We can also operate TDA8932B/33(B) from a symmetrical supply. On this diagram, three half supply voltage buffers are disabled. When supplied from a symmetrical supply, HVPREF (Pin 11), HVP1 (pin 30) and HVP2 (Pin 19) should be connected to ground. Here’s the circuit diagram: Compared to an asymmetrical supply, a symmetrical supply has some benefits. First, the size of the […]
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Two reasons why LM101 is well suited to comparator applications are it has a large differential input voltage range and the output is easily clamped to make it compatible with various driver and logic circuits. LM101 doesn’t have the speed of the LM7104 (10us versus 40 ns, under equivalent conditions) but spees is not a problem in many linear applications […]
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Sometimes, in linear equipment design, it’s necessary to take a voltage which is referred to some dc level and generate an amplified output which is referred to ground. Using a differential amplifier similar to that shown in the circuit diagram below (the upper one) is the most straight-forward way of doing this. However, this circuit has a disadvantage, that is […]
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