Thread: MY new PIC uC ION Detector
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Old 02-21-2007, 08:04 PM
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Esteban Esteban is offline
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Hi Nelson

Use BC547B (NPN) and BC557B (PNP). The original circuit is for negative ions. If you want catch positive replace the PNPs for NPNs and the NPN for PNP. Invert battery, led and meter.
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