So ive built this charger and i understand in general terms how voltage regulators work and i feed it with what my multimeter shows me as 18v from a 2amp transformer, BUT it gives me 2.2v output and 5.4 with a battery attached.(also the led status doesnt change) Could someone please help me with witch values to regulate and change for it to work with an 9ah battery and something arround 1-1.5amp flow would be great. Also i dont fully understand how the led indicator mechanism works, what changes when the battery is full to trigger the backwards current flow trough the leds. id really appreciate some help, im on low budget and i really want to keep this simple circuit. heres the description that came with it:
"Today a close friend visits tell want Dry cell lead acid battery charger circuit 12V 7.5hA sizes. In model to are simple and economize with. I then advise this circuit try build see. By use the integrated circuit voltage regulator the number is highly popular be , LM317K. This circuit has the principle is simple be heal level voltage be stable 13.5 Volt. Because battery must use voltage tall more then charger get follow want. Which battery of a friend must use current 1A take time charging about 8 hour then will have the electric energy with full speed ahead."
https://pdf1.alldatasheet.com/datasheet-pdf/view/22752/STMICROELECTRONICS/LM317K.html
