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CR-2032 coin cell battery holder, Memory Protection Devices P/N BC12AAPC, http://www.memoryprotectiondevices.com/datasheets/BC12AAPC-datasheet.pdf BC2003 CR2032 2032 Battery Holder BH-331P Battery Type 3xAAA Keystone Battery Holder BH-331P Battery Type 3xAAA Keystone Battery Holder SMD Tactile Switch, https://www.e-switch.com/system/asset/product_line/data_sheet/165/TL3342.pdf SWITCH SMD KSA SW 4-bit rotary coded switch, through-hole, https://www.nidec-copal-electronics.com/e/catalog/switch/sh-7000.pdf SPST Off-On Pushbutton, 1A, 30V, CW Industries P/N GPTS203211B, http://switches-connectors-custom.cwind.com/Asset/GPTS203211BR2.pdf SPST button switch with Signal Lamp, generic K switch single-pole double-throw spdt ON-ON illuminated red green D Push button switch, generic, two pins | | U3 | 1 | | Tayda | A-553 | | | | | | | C10 | 1 Consider replacing transistor through-holes with sockets or with a set screw, as required by some reasonable means, this is the decade counter expects CLOCK to pass 1/2 of V+ (i.e. 6v) but many external clock sources cycle between 0v and 5v or even much less. - One potentiometer per step, to set output voltages. (10) One potentiometer for internal.

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