Labels:text | screenshot | display OCR: ONO SOUND OUTPUT FROM YOUR PARALLEL PORT THIS DESIGN BY DAVE BOYD (Version 1,50) Power supply circuit addition. that you will copy and distoute it as well as even bulding the circuit for yourself. Alterations to this or any of the accompanying ally pss me off. Sellino this fle for o profit Is strictly illegal ond vill probably be followed up by legal action on ny port. Ing the drowing. However, If you would like to make a $5 donation to support the engineer (me) for the hours [ spent drawing this donations, questions, or comments to Dave Boyd, W2740 Rock River Paradise, Vatertoyn WI 53094. You can also ENAIL Me vlo LM I 7812T Q 14V 12 V+ 1A BRIDGE GNI RECTIFIER ZENER 22V ZNR 2200 01 UF 01 uF 100 Digi-Key LF # P7010 GND 22V ZNR Digi-Key 2200 01 UF 01 UF 100 # P7010 120V to 252V CENTERTAPPED 14V TRANSFORMER GNI ZENER (24V XFNR OK> 12 V- ASE GROUND voltoge side of the tronsformer ore suffidently Insulated circuitry In a. netol box ond then connect ground from the plug to the box. though highly recconended. They are set up is surge protection. The zener diodes should be replaced by transient voltage ait, I don't think that zener dlodes really need to be replaced. The circuit Isn't thot critical or volotile.
