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Rate goes down when resistance goes up, opposite to expectation. C1 is too small; need more than 100k to get below 200bpm - C1 is too small for film; is film needed? - Fix R25/R1 connection - One multi-pole rotary switch with LCD screen K switch dual double-pole single-throw OFF-ON D Single Pole Single Throw (SPST) switch, small symbol D 11x DIP Switch, Single Pole Single Throw (SPST) switch, small symbol D 3x DIP Switch, Single Pole Single Throw (SPST) switch, small symbol D 9x DIP Switch, Single Pole Single Throw (SPST) switch, small symbol D 8x DIP Switch, Single Pole Single Throw (DPST) Switch K switch single-pole double-throw spdt ON-ON horizontal MEC 5G single pole double throw | | | | | | | | S2 | 1 nF | Unpolarized capacitor | | Q1, Q2, Q3, Q4, Q5 R1, R2, R23.

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