Sound level meter circuit using LB1409
This project is a sound level meter circuit that easy and very cheap, can drive 9 LED display,The LB1409 is used as base of this circuit makes small size. Read more
Meters & Detectors
Digital temperature meter using LM335 or LM135
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 Read more
Digital capacitor meter projects easy to build
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 […] Read more
Multi function digital frequency meter circuit 0-100MHz
The Multi function digital frequency meter circuit 0-100MHz, is an instrument that can measurement many things in a single display with LED 7 segment 8 digit. The controls measures sector as well as the display is used a single master IC. Is A good IC of Intersil Corporation. ICM 7226B is a single IC at … Read more
Cheap alcohol tester circuit
Party is a lot of fun. Alcohol makes us happy. And. we should make an alcohol tester. Why? We do not need sad about it, right? Imagine your friends who live in California, USA. He said that he likes to party with friends. With alcoholic beverages and the need to drive a car. He does … Read more