Showing posts with label lm. Show all posts
Showing posts with label lm. Show all posts
Monday, October 20, 2014
Audio Lm 3909 IC conduction tester
This tiny conductivity tester works with LM 3909. The tester makes a beeping sound if the resistance between the test probes between 0 and 100 O lies. Due to the volume of the beep, the resistance between the test probes can be determined.
Parts List
R1 = 1 k
C1 = 10 uF
C2 = 100 nF
LS = Loudspeaker 12 to 16 Ω
IC1 = LM 3909
R1 = 1 k
C1 = 10 uF
C2 = 100 nF
LS = Loudspeaker 12 to 16 Ω
IC1 = LM 3909
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