--BawA-- -

Today, 12:16

FvM replied to a thread Clock for positive edge d-flipflop in Analog Circuit Design

Consider that edge sensitive flip flops are usually implemented as master slave topology circuit.

4 replies | 75 view(s)

Yesterday, 23:21

FvM replied to a thread Strain gauge touch probe for CNC digitizer in Robotics and Automation Forum

I presume the output of the shown sensor arrangement can be transformed to cartesian xyz coordinates by a linear operation. A signal that represents...

3 replies | 131 view(s)

Yesterday, 11:46

FvM replied to a thread frequency divider phase in Analog Circuit Design

That's a rather trivial interpretation, only based on the external waveforms shown in the simulation. You need to look at internal voltages and...

5 replies | 157 view(s)

16th January 2019, 22:25

FvM replied to a thread USB differential pair on 2 layer board in Hobby Circuits and Small Projects Problems

I have no impedance calculator at hand right now, but 40 miles trace width doesn't sound far off. It depends on the minimal clearance that can be...

3 replies | 155 view(s)

16th January 2019, 17:23

FvM replied to a thread PLC software for network access in Network

Most PLC systems have either built-in or optional network interfaces and provide different protocols as server or client. What is your PLC system,...

4 replies | 180 view(s)

16th January 2019, 10:09

FvM replied to a thread MCPCB which is double sided and with plated through vias in Power Electronics

I see that the LEDs are populating only a small part of the top side, thus a heat spreading feature may be helpful. The through plated double side...

8 replies | 164 view(s)

16th January 2019, 09:59

FvM replied to a thread Driving Induction motor using TRIAC in Power Electronics

I have used 1/4 W metal film resistors (0207 axial package) and 1/2 W in more rugged designs. Not absolutely necessary.

17 replies | 368 view(s)

16th January 2019, 09:44

FvM replied to a thread The xtal spice model in Analog Circuit Design

Crystal models have been posted along with oscillator circuits in the Yahoo Ltspice forum https://groups.yahoo.com/neo/groups/LTspice/info mostly by...

1 replies | 62 view(s)

16th January 2019, 09:40

FvM replied to a thread Brief List of 8 bit pic micro's and their features in Microcontrollers

I'm using the parametric search https://www.microchip.com/ParamChartSearch/Chart.aspx?branchID=30048

2 replies | 102 view(s)

15th January 2019, 12:48

FvM replied to a thread frequency divider phase in Analog Circuit Design

The stimulation signal timing is the same, but the required reset setup time is obviously different.

5 replies | 157 view(s)

15th January 2019, 08:05

FvM replied to a thread MCPCB which is double sided and with plated through vias in Power Electronics

Thanks for clarification. I didn't yet see this kind of double sided MCPCB. So they manage to isolate the vias from the metal core somehow. Two...

8 replies | 164 view(s)

15th January 2019, 07:55

FvM replied to a thread frequency divider phase in Analog Circuit Design

Both simulations are different regarding DFF propagation delay and reset input setup time. We don't know which parameters you put in.

5 replies | 157 view(s)

14th January 2019, 22:20

FvM replied to a thread MCPCB which is double sided and with plated through vias in Power Electronics

What should be the purpose of metal cladding with your board? How can it connect to a heatsink? Multilayer MCPCB can be made, although not so common....

8 replies | 164 view(s)

14th January 2019, 18:01

FvM replied to a thread Motion Detector Alarm Timer Modification in Analog Circuit Design

It's obviously a burglar alarm device, indicated by the tamper switch. 15 min delay sounds very unusual for burglar alarm, are you using it for a...

6 replies | 167 view(s)

14th January 2019, 17:33

FvM replied to a thread Driving Induction motor using TRIAC in Power Electronics

The R value is reasonable 2.2nF. Y2 capacitor won't give much snubber effect, better use X capacitor with 47 nF or 100 nF capacitance. - - -...

17 replies | 368 view(s)

14th January 2019, 15:09

FvM replied to a thread Driving Induction motor using TRIAC in Power Electronics

No clear values specified for R31 and C10.

17 replies | 368 view(s)

13th January 2019, 23:28

FvM replied to a thread Spartan 6 - OSERDES2 to ODDR - Unroutable signals in PLD, SPLD, GAL, CPLD, FPGA Design

The DDR output register is fed with half the final output data rate. This should allow to use general core registers for the 5:1 serializers. In...

4 replies | 251 view(s)

13th January 2019, 23:08

FvM replied to a thread Output inverter bridge for welding TIG machine? in Analog Circuit Design

That's an option. It's still rather difficult to interface the SMD transistor package to a heatsink. You can e.g. use massive thermal vias and mount...

8 replies | 227 view(s)

13th January 2019, 17:11

FvM replied to a thread Output inverter bridge for welding TIG machine? in Analog Circuit Design

You should start to design the transistor heat sinking. 150 A (27 W conduction losses in static operation) won't work on any kind of regular PCB. I...

8 replies | 227 view(s)

13th January 2019, 17:00

FvM replied to a thread "Crystal set" radio works only when connected to earth in Elementary Electronic Questions

The confusing point is the claim of using a ferrite rod antenna. If it works, radio operation won't depend on an earth connection. I guess,...

5 replies | 240 view(s)

13th January 2019, 16:42

FvM replied to a thread PNP transistor not working in Analog Circuit Design

It's apparently voltage supervisory application. You would specify threshold voltages for all monitored voltages, e.g. +5V >= 4.75V, -5V <= -4.75 and...

17 replies | 422 view(s)

13th January 2019, 15:09

FvM replied to a thread Driving Induction motor using TRIAC in Power Electronics

Which circuit? The latest circuit in post #6 has triac MT1 and MT2 interchanged, not correct. The snubber circuit, MOV parallel to RC series circuit...

17 replies | 368 view(s)

13th January 2019, 12:47

FvM replied to a thread How create negative voltage -700mV - -1000mV 30mA? in Analog Circuit Design

Regulated SC voltage inverters are available with -1.2V Vref, e.g. lm27761. You may introduce an intentional offset to the feedback path to get lower...

13 replies | 485 view(s)

13th January 2019, 12:15

FvM replied to a thread Turn on power triac - proposed circuit analysis in Analog Circuit Design

R4 is effectively useless because industry standard triacs have a gate "pull-down" resistor already built in. RC filter R5 + CAP is suggested at...

2 replies | 171 view(s)

13th January 2019, 11:25

FvM replied to a thread computing rated current for inductors in Elementary Electronic Questions

First point has been clarified, the Sumida datasheets give sufficient information about current rating. Second point is how to read it. Assuming...

8 replies | 254 view(s)

12th January 2019, 16:42

FvM replied to a thread OP amp output oscillating in Analog Circuit Design

The 4 MHz "noise" can't be generated by a slow OP, it must be sourced from the µC or other circuit parts. Seeing so large interference signals raises...

13 replies | 327 view(s)

12th January 2019, 15:16

FvM replied to a thread Driving Induction motor using TRIAC in Power Electronics

That's a MOV+cap combination, not a RC snubber. Please review also the circuit suggestions in AN3008 for trigger circuit RC filter.

17 replies | 368 view(s)

12th January 2019, 11:33

FvM replied to a thread AC motor brake system in Power Electronics

I still believe that the least effort solution for smooth DC braking is applying a low constant DC voltage (e.g. 10% of rated AC motor voltage)...

29 replies | 1416 view(s)