That's an inverter..Electrostatic said:I am looking for an application specific IC that converts to and from logic levels. For example, I would like to switch 320mVDC to 5VDC, without changing the reference voltage of 0V.
the power supply is 3.3 and o/p be 5 , a dc-dc conv reqd?, Y this 3.3v supply limitation?With the restriction of not using negative voltage in the circuitry and source voltage is 3.3Vdc.
Electrostatic said:Hello Experts out there, I have a question.
I am looking for an application specific IC that converts to and from logic levels. For example, I would like to switch 320mVDC to 5VDC, without changing the reference voltage of 0V. With the restriction of not using negative voltage in the circuitry and source voltage is 3.3Vdc. The situation is that the voltage levels from our microcontroller, which is TTL Logic, is not compatible with the external peripheral circuits that are on different voltage levels(HIGHS and LOWS).
In other words, I would like to match up the voltage level of my peripheral with the voltage level of my microcontroller.
I would like some help on figuring out how to align or adjust efficiently between logic levels. Any and all information is appreciated
akg said:That's an inverter..Electrostatic said:I am looking for an application specific IC that converts to and from logic levels. For example, I would like to switch 320mVDC to 5VDC, without changing the reference voltage of 0V.
the power supply is 3.3 and o/p be 5 , a dc-dc conv reqd?, Y this 3.3v supply limitation?With the restriction of not using negative voltage in the circuitry and source voltage is 3.3Vdc.
Electrostatic said:The project that we are doing is involving the HC12 microcontroller and the power supply is coming from the playstation. The playstation is suppling around 3.3V. We are trying to amplify the attention signal of the playstation which is around 320mVDC because the program that was uploaded into the microcontroller is not reading the attention signal because the signal is to low of a voltage.
A single supply opamp like an LM358 dual or a MC33171 single can amplify signals from 0V to about +2.1V for the LM358 or to about 2.7V with the MC33171 with a single +3.3V supply.Electrostatic said:We are trying to amplify the attention signal of the playstation which is around 320mVDC.
We are trying to amplify this signal and so we were going to use an opamp but we are trying to avoid a using negative voltage.
audioguru said:A single supply opamp like an LM358 dual or a MC33171 single can amplify signals from 0V to about +2.1V for the LM358 or to about 2.7V with the MC33171 with a single +3.3V supply.Electrostatic said:We are trying to amplify the attention signal of the playstation which is around 320mVDC.
We are trying to amplify this signal and so we were going to use an opamp but we are trying to avoid a using negative voltage.
A Charge-pump voltage-doubler IC can be used to supply the opamp with about 6.2V (they aren't perfect) so its max output voltage would be about 5.0V to 5.6V.
A Cmos opamp would have a max output voltage of 3.3V with a 3.3V supply and a high impedance load.
Nigel Goodwin said:You really need to find out what's going on, the voltages you keep mentioning aren't logic levels (under any logic system) - I suspect you're probably measuring things incorrectly somehow?.
Electrostatic said:The program that my partner wrote for this microcontroller was to verify that the command 01H was receieved serially to the playstation controller from the Playstation as referenced in the method of operation. Now when my friend wrote the program the HC12 didn't want to respond to it because when the voltage levels measured coming out of the playstation did not meet the standard levels needed for the HC12. The voltages coming out of the playstation was the following:
DATA--------- .15V
ATTN---------- .32V
ACK----------3V
CMD-------- 243mV
CLK--------- 3.5V
The voltage levels im refering to is from the playstation. Im trying to match these voltage levels to the HC12's logic system of levels in order for the program to work.
Nigel Goodwin said:Electrostatic said:The program that my partner wrote for this microcontroller was to verify that the command 01H was receieved serially to the playstation controller from the Playstation as referenced in the method of operation. Now when my friend wrote the program the HC12 didn't want to respond to it because when the voltage levels measured coming out of the playstation did not meet the standard levels needed for the HC12. The voltages coming out of the playstation was the following:
DATA--------- .15V
ATTN---------- .32V
ACK----------3V
CMD-------- 243mV
CLK--------- 3.5V
The voltage levels im refering to is from the playstation. Im trying to match these voltage levels to the HC12's logic system of levels in order for the program to work.
As I said above, those figures don't make any sense! - how were they measured?.
Electrostatic said:Nigel Goodwin said:Electrostatic said:The program that my partner wrote for this microcontroller was to verify that the command 01H was receieved serially to the playstation controller from the Playstation as referenced in the method of operation. Now when my friend wrote the program the HC12 didn't want to respond to it because when the voltage levels measured coming out of the playstation did not meet the standard levels needed for the HC12. The voltages coming out of the playstation was the following:
DATA--------- .15V
ATTN---------- .32V
ACK----------3V
CMD-------- 243mV
CLK--------- 3.5V
The voltage levels im refering to is from the playstation. Im trying to match these voltage levels to the HC12's logic system of levels in order for the program to work.
As I said above, those figures don't make any sense! - how were they measured?.
This information was taken from the oscilloscope. Each individual wire was taken and the voltage was measured by the scope. Why do you say that they may have been measured incorrectly.
Electrostatic said:So if the pin outs for the playstation are TTL voltage levels and the HC12 is a TTL controller then in other words there would be no need to try and amplify the signal coming from the playstation pin outs.
Nigel Goodwin said:Electrostatic said:So if the pin outs for the playstation are TTL voltage levels and the HC12 is a TTL controller then in other words there would be no need to try and amplify the signal coming from the playstation pin outs.
Exactly! - like I said, the voltages you gave make no sense at all - you need to check them with a scope, and make sure you get values for both HIGH and LOW levels (then throw the low one away!).
Nigel Goodwin said:A specific IC would only be good for the specific purpose it was designed, there 'may' be something available, but we would need to know EXACTLY, and I mean EXACTLY! what you are trying to do.
I don't see much relevence between multiplexing and your controller?.
Electrostatic said:Nigel Goodwin said:A specific IC would only be good for the specific purpose it was designed, there 'may' be something available, but we would need to know EXACTLY, and I mean EXACTLY! what you are trying to do.
I don't see much relevence between multiplexing and your controller?.
Im trying to recreate the playstation controller into two separate gloves using pressure sensors for both of the gloves. In other words one hand will do the directional section and the other hand will do the buttons. So, the controller is being split in half but i trying to think of a way in which to combine the two separate gloves to form one data line.
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