Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Re: Level shifting
That looks great! I can then duplicate the circuit to generate the clock signal. Thank you very much. One question. Your notation for resistors is a little different than I'm used to. Is a 7k5 the same as a 7.5k?
Thanks again.
Mark
Re: Level shifting
The caliper uses a very small battery. I would try to avoid using the battery power to run the rest of the circuitry if at all possible.
Re: Level shifting
I realize now that I'm going to have to have two external comparators because the caliper has a data line and a clock line that will both have to be shifted to TTL levels. It uses an SPI type of protocol so I'll need them both at TTL levels so that the data can be shifted...
Re: Level shifting
Okay, great. I'm a digital kind of guy, not analog. Is the comparator in the PIC a voltage comparator as opposed to a current comparator (at least I know enough to ask the question)? How do I get the .75v reference for one side of the comparator? Also, is there any kind...
I want to read the digital data coming from a digital caliper. The caliper runs on a 1.55v battery so the digital data swings between approx. 0v and 1.55v. In order to read the data using a PIC micro the data needs to be at standard levels, namely 0v-5v. Once the data is at standard levels I...
vrla battery discharge curve
I want to vary the speed of the motor in both forward and reverse. I plan to control the speed with a PWM signal from a PIC microcontroller. That is the reason for using the HIP4081A. It is to simplify the interface between the PIC and the H-bridge. That is what...
hip4081a
The motor I'm using is an automobile radiator fan motor and I'm using it as the drive motor for a model submarine. All the examples that I've seen using the HIP4081A use a separate 12v supply for the chip, and I, likewise, don't want the chip running off the same 12v supply that is...
sla battery charge curve voltage
The board I'm designing is a motor controller and the chip that requires 12v is an HIP4081A H-bridge driver. Its data sheet says that is draws a maximum of 15.5ma. The rest of the control logic runs off of 5v. I found a dc-dc converter chip, the MAX662A...
sla discharge curve
I have a circuit that will be powered by a 12v SLA battery. One of the chips in the circuit requires a regulated 12v supply. I know that the battery puts out about 14v when fully charged. I intend to use a LDO regulator for the 12v which will continue to operate as long...
Re: SPLD programming
The Xilinx XC9500 series looks very interesting but is completely new to me. Where do you go to find the free development software and information about buying inexpensive programmers or building your own?
spld programming
The CPLD's seem like a pretty big jump. Are there any in particular that you would recommend? And how would I get going with them, programming and development wise?
Thanks again.
I would like to be able to use SPLD's (16V8, 20V8, 22V10) in my design to reduce chip count but I don't have any programming capability for them. All of the commercial programmers that I've seen are pretty expensive. Does anyone know of an inexpensive way to get a programming capability for...
using mosfet led
One more question if everybody doesn't mind: is it alright to drive the MOSFET's using 74HCT gates or should I stick with 74HC or 4000 series gates?
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
