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audioguru
i live in Greece.. Here we have a lot of vw beetles in the road...still running and in good shape..
i own 3 of them.. one 1961 convertible , one 1963 and one 1969
Beetles were produced for almost 50 years and were produced 21,529,464 cars
so there are many many beetles around the world still running and with many new parts available![]()
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ericgibbs
Thanks one more time for the help.. i will start build it from tomorrow , will post results for this one![]()
hi,
Can I suggest that you combine the two threads you have running on this topic.![]()
? i have only one.. the other one belong to an other person... but i can copy and paste the issues refer to my questions from there![]()
the input is from R (Tank )
my tank has inside a sensor (resistance that variables - full gives me 5 ohm and when the tank is empty gives 80 ohm )
so takes the Ground and give it throw the resistance to the Gauge ..
Ηι
It was no volts
My mistake.. i start checking my circuit and i find out that hadnt connect the R7 to the 6V
but still not working as it should ...
- at the junction of R1 and R2 i have 5.91 volts
but in the output i get 4.66 volts what ever i do - move the floter resistance....
i check it with a 4,7 variable resistance - trimmer instead of the cars floter... i get the same voltage 4.66v out the output for 0 k - 4.7k
what may i have done wrong??
the c1,c2 1μ are 1 μf ? ( that is what i have placed in my circuit)
thanks again both for the interesting you saw to my project-problems
This is how i connect it...
the floter/sender is ground to the tank and the tank to the car chassis .... ( is somethink that can not be changed )
SUCCESS !!!!
Sorry for all this trouble !! as i was inspecting my circuit to check the connections... i saw that i had one bad-soldering to the R1 resistance where joins sender and R3
After fixing this... working absolutely fine![]()
thanks to yours affords
some extra info now ( hope not bored with my questions and mistakes)
if i had an other sender with 6 ohm - 75 ohm sender... witch resistors in the circuit have to change ?
(not care about the amount of the resistors just for understanding the circuit how it works)
if i want to have 3-4 seconds delay in the lm3914 display have to follow something like this schematic with both op amp lm358 connected ?
The schematic is from MikeMl from an other similar post
hi,
A quick look at Mikes 'slosh filter' and sensor amp shows the signal is in the same sense as my version, so it should be OK to add the LM358 from point 'g' in the circuit.
I expect Mike will confirm this.
Often we have to ask the same question over and over and then we may get an answer.![]()
this for the 6R to 75R sender.
Question : when we have 2 circuits like this project (one with lm358 and the other with lm3914) and we use the same voltage supply ( lets say 8v through lm7808) it is better to use one lm78xx for both circuits or use one lm78xx for each one ??