Timeline for convert TTL/CMOS output signals to 0V and 5V [duplicate]
Current License: CC BY-SA 3.0
13 events
| when toggle format | what | by | license | comment | |
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| Jul 5, 2017 at 15:28 | history | closed |
Dmitry Grigoryev PeterJ JRE winny Voltage Spike♦ |
Duplicate of Bidirectional 5 V to 3.3 V level shifter | |
| Jul 1, 2017 at 0:54 | vote | accept | MrSharp | ||
| Jun 30, 2017 at 12:11 | comment | added | brhans | "Normal" digital logic families are very tolerant with regard to input voltage levels. For example old TTLs will read anything below 0.8V as a low, and anything above 2V as a high. I doubt you'll have any trouble driving an arduino shield directly from a Z80 device. | |
| Jun 30, 2017 at 7:34 | review | Close votes | |||
| Jul 5, 2017 at 15:28 | |||||
| Jun 30, 2017 at 1:53 | comment | added | MrSharp | First of all, excuse my newbness ;-) what I'm trying to do is generating PWM from a Z80 with a Z80CTC and a Z80PIO and use arduino shields with them (disregard questions about the other arduino shield pins, I'm just interested in the pwm issue). From what I understand (maybe wrongly), the arduino PWM pins output 0 or +5V. My concern is that if I generate PWM between let's say 0.20V and 3.90V, whatever connected on this pin may not work as intended, or will it? | |
| Jun 30, 2017 at 1:34 | answer | added | Spehro 'speff' Pefhany | timeline score: 3 | |
| Jun 30, 2017 at 0:00 | comment | added | MarkU | Use a Level Translator such as electronics.stackexchange.com/a/97892/35022 | |
| Jun 29, 2017 at 21:43 | comment | added | nickagian | The 0.1V is normally low enough to be detected as LOW by the other side. Why need to convert it to 0V? Just a very general answer, like your general question: you can use a comparator for the 3.9V to 5V conversion. | |
| Jun 29, 2017 at 21:42 | comment | added | sstobbe | VTC of an inverter courseware.ee.calpoly.edu/~dbraun/courses/ee307/F02/02_Shelley/… is worth understanding as the general theory applies to all logic gates. As a bonus the VTC is for a 5V gate, readoff 3.9V input as a sample. | |
| Jun 29, 2017 at 21:38 | comment | added | brhans | How close to 0V and 5V is good enough? | |
| Jun 29, 2017 at 21:31 | comment | added | Transistor | Not enough detail. What's the load? What's the speed? And why? | |
| Jun 29, 2017 at 21:30 | review | First posts | |||
| Jun 30, 2017 at 7:19 | |||||
| Jun 29, 2017 at 21:30 | history | asked | MrSharp | CC BY-SA 3.0 |