Clinical thermometer (CB7244E)

For measurements between 30 and 40º C this circuit was found in the documentation of 1968. The sensor is a difficult component to obtain today.

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SCR LED Modulator (CB14688E)
The selected circuit was found in the Texas Instruments optoelectronics manual. RC and C1...
Broadband preamplifier (CB20262E)
The operating range of this circuit ranges from 0.5 to 2 MHz and its gain is 11dB. Transistors can be of...
Digital Non-Inverting Amplifier (CB25628E)
This digital buffer was found in the November 1993 issue of Electronics Now. The power supply...