Before revision: It has a red LED for high state, green LED for low state, amber LED for pulsing state, and a changing audible tone.Elenco LP-560 logic probe A logic probe is a hand-held test probe used for analyzing and troubleshooting the logical states (boolean 0 or 1) of a digital circuit.
After revision: low-costIt has a red LED for high state, green LED for low state, amber LED for pulsing state, and a changing audible tone.Elenco LP-560 logic probe A logic probe is a hand-held test probe used for analyzing and troubleshooting the logical states (boolean 0 or 1) of a digital circuit.