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    Self-powered Fast Battery Tester Circuit

    I swapped the IC chips with TLC555 Cmos and the voltage at C8 is better but still only about 1.8v. This is still not near enough to light the LED. With 5vdc applied to the circuit the voltage at C8 is also low.
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    Self-powered Fast Battery Tester Circuit

    Thanks audioguru, I appreciate your time and patience. Its rare to find someone thats so knowlegable and quick to help as yourself, you made my day. Thanks again. Tom
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    Self-powered Fast Battery Tester Circuit

    Thanks for responding audioguru, 1) What size of battery cell did you try? 1.5v AA and also tried 5vdc straight from a power supply. With 5vdc C8 only charges to approx. 3.5v. Used a logic probe to ring out the chips, IC1 pin 3 is definitely oscillating but I lose the signal on the other side...
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    Self-powered Fast Battery Tester Circuit

    I have been trying to get this circuit posted on your site to operate for three days now. I've followed the schematic and instructions to the letter. Checked and rechecked all connections, replaced components and rewired over and over again. I've even tried to simulate the circuit with PSpice to...
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