Tag Archives: TTL
Making USB using RS232 converter
Making USB using RS232 converter works really well with all the devices I tried.
USB to RS232 converter can also use FT8U232AM and Maxim-IC MAX235
If no FT8U232AM, could also use TTL level RS232 signals.
The FT8U232AM and supporting components are also available as a complete module – called USBMOD1 – in 32pin DIL IC packages, making the [...]
Circuit Diagram Radio Stereo Coder Multplexer Part 1
Circuit Diagram Stereo Coder Multplexer
Multiplexer consists of 4 TTL ICs and transistors. A 7600-kHz crystal oscillator built with the 3-NAND
The IC’s 2 and 3 of type SN7490. Now think of 76 kHz signal
as a divider of two Werken. Either 38 kHz signal and the output Q Qnot decreased.
Transistors T1 and T2 thus transformed [...]
Posted in Electronic Circuit Also tagged 7600-kHz, 7600khz, BC177, BF199, Circuit, Circuit Diagram, Coder, crystal, diagram, Ic sn7400, ICs, Multplexer, oscillator, SN7474, SN7490, Stereo, transistors. A, X-Tal Leave a comment
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 [...]
Posted in Switches Diagram Also tagged Circuit, connection, DIRECT, driver, PC, Protect, RS232 Leave a comment
Circuit diagram Complementary TTL Inverter