Band decoder MK2

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!!!Open collector [https://remoteqth.com/img/wiki-bd2-11.png] Using for components with grounding outputs * Put in ULN2803A chip to U5 dil socket * Set two jumpers in P2 to '''LEFT side''' * board '''rev 1.0''' ** If relay voltage is '''higher than band decoder power supply (Vin),''' do not mount the upper jumper. * board rev '''1.2 and higher''' ** Connect relay power voltage also on '''{.redka#id color: #f23f37;}pin23{/}''' J2-DB25 connector.
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