Labels:book | bulletin board | poster | reckoner | sky OCR: AppendirA PE Card Modification Instructions Voltage Regulators Appendix A PE Card Modification Instructions Voltage Regulators All of the cards which require modification require it because it has on it either 7812 or 7912 voltage regulator shown below in figure Each of these device has three terminals coming out from them but they op not have the same function. Check closely when modify- ing board that you have located the correct regulator and which type The function of these regulators is to drop the incoming voltage Vin to the correct voltage modified regulators +12 volt. reg 12 volt reg +12 volt reg 12 volt reg 7812 7912 7812 7912 pin Vin pin Com pin Com pin Vin pin Vout pin Vout FIGURE7 Vout This is required in a TI-PE Box because the voltage coming in is unregulated and may be twice ...
