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How do I convert an analogue signal to a digital signal and display it on 7 segment LED's. This must be done without using any programmable micro-controllers.
It's for a school project. The analogue input signal is coming from another unit which monitors the room temperature.

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  • \$\begingroup\$ Is this a homework assignment? \$\endgroup\$ – JRE Apr 8 '16 at 12:25
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    \$\begingroup\$ It looks like. Ok, no MCU. Use a CPLD and an ADC instead ;-) \$\endgroup\$ – Jacen Apr 8 '16 at 12:26
  • \$\begingroup\$ Just get a digital multimeter and save yourself the hassle of designing something with weird constraints. \$\endgroup\$ – Andy aka Apr 8 '16 at 12:43
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    \$\begingroup\$ If it is homework, then I expect the correct answer would be: implement a simple ADC with parallel output, then use a pile of discrete logic ICs to take in the binary bits and drive the LED display. \$\endgroup\$ – JRE Apr 8 '16 at 12:44
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You use a digital voltmeter chip such as the Intersil ICL7107.

enter image description here

Figure 1. Intersil 7106/7 voltmeter.

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  • \$\begingroup\$ Preassembled modules based on this kind of chip are readily available, too. \$\endgroup\$ – Dave Tweed Apr 8 '16 at 12:23

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