Fail-safe Continuity Tester with Adjustable Threshold
![1823](https://cdn.xingosoftware.com/elektor/images/fetch/dpr_1,w_200/https%3A%2F%2Fwww.elektormagazine.fr%2Fassets%2Fupload%2Fimg%2Fpublic%2Foriginal%2Ftcn9818-3593-acrw.jpg)
If sometimes you are absent-minded like me, this continuity tester will forgive you by protecting itself and the circuits under test.
Withstands sustained voltages up to 35V.
Safe open circuit voltage: 100mV.
Short-circuit current: 5mA.
Adjustable threshold from 1 up to 20 ohms.
Lead wires resistance compensation.
LED conduction indicator supplements beep.
Powered from 2xAAA cells with battery test.
Reverse battery protection.
Low open circuit consumption: 0.5mA.
Safe open circuit voltage: 100mV.
Short-circuit current: 5mA.
Adjustable threshold from 1 up to 20 ohms.
Lead wires resistance compensation.
LED conduction indicator supplements beep.
Powered from 2xAAA cells with battery test.
Reverse battery protection.
Low open circuit consumption: 0.5mA.
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