Feeds12:332Q: Power spliter for Raspberry pi and servo motor I would like one plug to power a raspberry pi zero and also a servo motor… I know I need a transistor chip or […]

Also are you using your original HC126 cct with enable/disable TxD/RxD, or your new version with Rpi 3V3/5V0 level shift up? My cct does not sue any GPIO to pull up HC03 […]

@AdrianMaire Ha, I have not thought about it too carefully. I simple mindedly thought that higher clock speed means less time each instruction. So 2GHz CPU should run instructions two times faster […]

tlfong014137Tue 22:14For example，TxD is connected to input of a D Flip/Flop. When TxD start bit comes, D F/F Q will enable TxD, and ~Q disable RxD. I did not go further, otherwise […]

Feeds12:051A: Can I use a ULN2003A IC as many transistor switches? Question Can I use ULN2003 to switch 5V relays which in turn switch 220VAC loads? Answer No problem at all. Your ULN2003 […]

A: How to interface UART servo? (LX-224HV) Question How can Rpi4B talk to duplex BUS UART servo LX-224HV? Answer Part B – Rpi4B UART to LX-224HV Simplex Serial Ciruit Design V0.1 Next step […]

LX-224HV Testing Notes A: How to interface UART servo? (LX-224HV) Question How can Rpi4B talk to duplex BUS UART servo LX-224HV? Answer Part B – Rpi4B UART to LX-224HV Simplex Serial Ciruit Design […]

A: How to interface UART servo? (LX-224HV) Question How can Rpi4B talk to duplex BUS UART servo LX-224HV? Answer Part B – Rpi4B UART to LX-224HV Simplex Serial Ciruit Design V0.1 Next step […]

A: How to interface UART servo? (LX-224HV) Question How can Rpi4B talk to duplex BUS UART servo LX-224HV? Answer Part B – Rpi4B UART to LX-224HV Simplex Serial Ciruit Design V0.1 Next step […]

THM3060 RFID reader setup issues Ask QuestionAsked 16 days agoActive 13 days agoViewed 69 times2 I got the following rfid reader from a colleague  I have connected it to my raspberry pi 4 module b […]