Automatic Mobile Power Control

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2 layer board of 2.15x2.01 inches (54.69x51.13 mm).
Shared on June 7th, 2014 19:54.

November 2012 QST Page 43 W8WKE.

JP1 should be disconnected unless you want the regulators to run 24/7 Connect REG_VIN to the output of the relay.

8-24-14 I specked the wrong op amp It only went to +7V on V+. change to op-amp LT6020HMS8#PBF-ND. Questions, contact me at kd0zby@arrl.org

BOM is @http://www.digikey.com/short/1ddq8 Text List of BOM Quantity Digikey Part Number Description Part ID 1 FJX2222ATFCT-ND TRANSISTOR NPN 40V 600MA SOT-323 Q1 1 LT6020HMS8#PBF-ND IC OPAMP 8MSOP U1 1 P15438CT-ND CAP ALUM 33UF 25V 20% SMD C1 1 399-5733-1-ND CAP CER 1UF 25V 10% X8L 1206 C2 1 SMAZ5V1-FDICT-ND DIODE ZENER 5.1V 1W SMA D2 1 754-1800-1-ND LED 3.2X1.6 GRN WATER CLEAR SMD D5 1 S1GFSCT-ND DIODE Gen Purpose 400V 1A SMA D1 2 RMCF1206FT1K00CT-ND RES 1K OHM 1/4W 1% 1206 R1, R6 1 RMCF1206FT2K20CT-ND RES 2.2K OHM 1/4W 1% 1206 R5 1 RMCF1206FT100KCT-ND RES 100K OHM 1/4W 1% 1206 R3 1 RMCF1206FT10M0CT-ND RES 10M OHM 1/4W 1% 1206 R4 1 987-1155-ND TRIMMER 10K OHM 0.25W SMD R2 1 BA033CC0T-ND IC REG LDO 3.3V 1A TO220FP U2 1 LM7805CT-ND IC REG LDO 5V 1A TO220-3 U3 1 LM2940T-12.0/NOPB-ND IC REG LDO 12V 1A TO220-3 U4

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