RFID/max232

https://www.4shared.com/web/q/#query=PIC%20Microcontroller%20Projects%20
http://shahrulnizam.com/pic-lesson-rfid-reader/
https://www.google.com.br/imgres?imgurl=https%3A%2F%2Fi.stack.imgur.com%2FzRTwE.jpg&imgrefurl=https%3A%2F%2Felectronics.stackexchange.com%2Fquestions%2F42718%2Fmax232-circuit-what-is-the-purpose-of-the-capacitors&docid=5qffYiu91MTHvM&tbnid=kDLdixhr0CqE-M%3A&vet=10ahUKEwiS-uvU_53XAhUCQpAKHaFUDPcQMwgoKAIwAg..i&w=392&h=299&bih=769&biw=1440&q=max232&ved=0ahUKEwiS-uvU_53XAhUCQpAKHaFUDPcQMwgoKAIwAg&iact=mrc&uact=8
https://i.stack.imgur.com/zRTwE.jpg
http://www.ti.com/lit/ds/symlink/max232.pdf
https://www.google.com.br/search?ei=fBH6Wc7ZDsn9wAT7y4f4Dw&q=rdm6300+%2B+max232&oq=rdm6300+%2B+max232&gs_l=psy-ab.3...36852.42578.0.42981.9.9.0.0.0.0.321.1432.2-4j1.5.0....0...1.1.64.psy-ab..4.3.844...0j0i30k1j0i22i30k1.0.JpebJN3yeZQ
https://www.filipeflop.com/produto/leitor-rfid-rdm6300-125khz/
https://www.google.com.br/imgres?imgurl=http%3A%2F%2Fwww.automalabs.com.br%2Fwp-content%2Fuploads%2F2013%2F03%2Fadaptador_RS232_TTL_MAX232_IMG_1065_640_automalabs.com_.br_.jpg&imgrefurl=http%3A%2F%2Fwww.automalabs.com.br%2Fadaptador-rs232-serial-ttl-baseado-em-max232%2F&docid=CRPmjuZq1zXfwM&tbnid=2x-OC3AMfxBbCM%3A&vet=10ahUKEwj-udSDgJ7XAhVMj5AKHX1DDvkQMwgvKAkwCQ..i&w=640&h=565&bih=769&biw=1440&q=rdm6300%20%2B%20max232&ved=0ahUKEwj-udSDgJ7XAhVMj5AKHX1DDvkQMwgvKAkwCQ&iact=mrc&uact=8
https://www.engineersgarage.com/microcontroller/8051projects/interface-rfid-AT89C51-circuit