Bluetooth cellular phone circuit
GSM SMS Controller circuit using Bluetooth cellular phone and Bt serial
Bluetooth cell phone serial and GSM SMS Controller circuit using PIC16LF875
Posts tagged connection
Bluetooth cell phone
TTL RS232 driver circuit and Protect the PC from direct connection to hazardous voltages
TTL RS232 driver circuit.
TTL driver circuit consists of 2 transistors and a few other passive components, a negative voltage for RS232 logic generated by the capacitor C7.
TTL to RS232 driver circuit and a variable voltage output driver has a parallel termination impedance to match cable and TTL driver circuit, and provides the best waveform.
When driving [...]
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