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32 Threads found on 12v Ttl
Hi..i have checked it and i have turned it off..but its still the same and when i connect RB8 to ground its working. - - - Updated - - - I do have some more circuit is an automatic water level controller.the sensors work through conduction i have to pass certain voltage to the water cont
frito, I see you are designing with old school ttl circuits and maybe using some low power LDO and you "may be" wondering about paralleling these LDO sources because you are probably driving them with 12v and running very inefficiently and hot. (This is just from my crystal ball and insight) Short answer is yes but can you do us a favour and
I want to find a circuit to level translate the output of the coil (12v) to the input of a microprocessor.
The P-MOSFET requires a 0 to 12v gate signal to turn on and off with a 12v supply on the source so, as ER stated, you need a level shifter.
The 433 MHz ASK transmitter modules work from 3V to 12v but I don't know whether 12v can be given to DATA pin or not. You can provide 12v for VCC and %V ttl from uC to DATA pin of RF module (Transmitter). Providing 12v power will increase the range of transmission. For 3V I have obtained 40 ft transmission. (...)
hi, Its possible that you will damage the Control input devices. I use either 5V ttl or 12v logic If you only have 40V control signals available, use a resistive divider , drop from 40V to around 6V E
a simple encoder can have 3 outputs it is define by the number of pulses per tour example : 500 i/tr by the mode of output : Totem pole transistor, ttl output, simple transistor, RS485 (for long distance of cable) the level 5V (ttl) , 12v or 24V or RS485 or open collector.... 1 output A with give 500 pulses 1 output B with gives also (...)
A spark plug will not work from only 12v. It needs THOUSANDS of volts.
Use a driver chip like TC427 with a 12v supply. It has a ttl input level specification and can be driven by 3.3V CMOS.
Depends on the application. In general I prefer the NPN because it can be driven directly by a logic output. And the VCC of the relay can be higher than the logic level. For example you can control a 12v, 24v (or more) relay with a ttl output. The PNP is useful when a High side driver is required. It needs an extra transistor or an Open collector
hi friends I'm trying to interface glucometers with atmega16 on uart. but the problem is that one of my glucometer gives LVttl interface logic(0 to 3.3v) and another one gives rs232 signal (-12v t0 +12v) and one more glucometer gives ttl o/p (0 to 5v). but the problem is that my controller is capable to read signal ranging (...)
Presented converter is based on UCB → RS232 module for Prolific, system model PL-2303HX. To meet the RS232 standard according to the voltage levels -12v, +12v available in Pcs, 2 max232 systems were used in this device. A
Hello, I need help in choosing the right MOSFET for my circuit. I want to connect a power resistor 50W 4ohm to 12v (from cpu power supply) with a MOSFET. The Gate pin of the MOSFET will connect to a pwm pin of ATmega328 (pwm 490hz and 5V logic '1'). In conclusion i need to know what MOSFET (and maybe another parts) i should connect from the
I am doing a small box that will simulate some signals which are normally 24v (or 12v). Presently everything is working (i.e. firmware running) and the output is 3.3v ttl (from the micro). But, in order to interface to the equipment being tested, the 3.3v needs to be 24v (or what ever the supply voltage is). What is the best circuit to use for this
Hi Every one, I am having a nightmare of a time with an fsk receiver module and a pic16f877a. I have built a project that receives data from an fsk receiver using 5v rs232 / ttl. When the receiver is powered up independantly from the PIC, everything is working great. When they are both connected to the same power supply I do not even get a kbhit()
Use a differential amplifier 58192 If you apply an offset of 12v and set the gain to 1/5 then the (+12 to -12)+12 offset x1/5 will give 0-4.8v Alex
The circuit uses a ttl 74132 schmitt trigger as oscillator, ttl logic needs a 5V supply. The output stage is powered by 12v.
I used FBUS communication with old NOKIA phones 3310, & 5110 5 years back. I remember the Mobile supports ttl voltage level RS232 signals. FT232 gives output +12v & -12v. Mobile requires 3.3V/5.0V. You can try this using RS232 to ttl level converter. The following liink may be useful to you: Ple
I'm a absolute beginner in electronics and especially in writing code for uC. So that's why I ask you to give a code in C (even a schematic if it's ok, I have problems even with ground) for testing rf modules I was thinking at this: pc sends data on USB with a serial adapter (that means there aren't +-12v), a MAX232, for making ttl, then the RF t
maybe it's a hardware issue, have you connected the microcontroller with the same cable you used to connecto to the PC? the PC COM port have a RS232 bit levels (0 +12v ; 1 -12v) but the microcontroller have ttl/cmos Levels (0 0v, 1 5v)... if you are connecting directtly, it will not work never! if you are using an extra (...)
Hi, You can connect the output pull up resistor alone to 5V supply even if the IC supply is 12v, to get ttl output. Else you can use 5V supply for the IC as well as the pull up resistor. Regards, Laktronics
Hello, You can use a simple Voltage Divider to Feed a CMOS buffer such as CD4050 and then take the 5 Volt output. Since CD4050 is CMOS and power with 5V its good for your output. But for the input you have 0-12v so you require to reduce it to some 4 or 5V . This is easily achieved using a proportional Voltage Divider given by below eq: Vout = V
At which point is Vo? Anyway, the Vo should be 12v or 0V....
Your assumption about the RS232 connection is incorrect. The UART output and input on the 89C51 are 5V ttl signals. The RS232 standard is bi-polar +-12v signals. (However, it will work at much lower voltages.) The other BIG problem is that the interface IC is an inverter in both directions. Therefore, all your signals are upside down! The
Hello, Sorry for my english. I need a scheme, that inverts the polarity (+/- 12v), with signal ttl: But it doesn't run. Any idea where I can find other? Thanks.
MAX232 converts voltage level from ttl aprox. to +/- 12v.
How can I make a voltage level shifter? using a transisitor? I need to translate a ttl logic level into a 12v logic level. I tried (swCAD simulation) to apply the 5v at the base and 12v Vcc and tried to take the output from the collector. With no emitter resistor. The output was perfect except that the current was 0mA when the Vc was (...)
You need to tonvert the ttl levels from the micro to the 12v for the PC that's why a Max232 is needed, but you could use this circuit and do away with the Max232
Attached is a diagram of wideband D-class amplifier which can be driven of ttl levels. Supply can be 24 for power stage and 12v for pre-amplifier. If you like this concept I can give you more details on this circuit. Regards, IanP
I have DM-62M LCD monitor (Black/white, 640x480), this is from users`s manual: 44 pin ttl with 5V and 12v. I need this lcd to use with PC/104 (PC/104 have 44 pin LCD connector), PC/104 name is PCM5820. At first LCD turning on it didn`t worked (the same situation today :( ) When i verified pin configuration of lcd`s connector, i discovered
Putting a MAX232 you will convert ttl levels (0-5v) to RS232 levels (-12/12v), so just a resistor divider will attenuate the voltages to your needs..
No problem with modularization klugkopf but I thought that he wants this transaction from 12v to ttl just for educational reasons.Otherwise there would have been a more specific request on the matter! Modularization - if I understand well your meaning - is for people well understanding electronics and seeking fast solutions to their circuits! [