Here is simple ICL7017 digital voltmeter circuit easy to build and cheap because it is high technology, by single IC,small number, along by LED 3 digit.
This circuit is built to add capacitance meter range range for a general digital multimeter which is small,cheap and most popular. [...]
This is digital temperature meter circuit that has High the accuracy temperature measurement. it use ICL7107 for LED 7 segment display and LM335 or LM135
I recommend the digital capacitor meter projects. It can measure capacitors ranging from 1pF to 2,000 uF. Which covers almost all of capacity. And cheaper [...]