Hello Mr. Michallick, I was hoping you could look at my schematic and tell us why this will not work. we built it and it is not timing at all. the relay is powered up as soon as the 24 volts is applied. We would be happy to pay a fee.
Part Number: NE555 Hello,
I'm looking for a recommended PCB layout for NE555 P (PDIP package) including its hole size. Is it available? I need the information by the end of this week, March 24.
Best regards, Shinichi Yokota
Other Parts Discussed in Thread: NE555 , LMC555 , SE555 , SA555 , NA555 What is the NE555 frequency range in astable? Is there any RC design criteria for NE555 in astable condition design?
Hi Ron,
Thanks for the reply..
As per your suggestion, I have calculated the resistor values and implemented the same on the 5 boards and I am able to get approximate 90 KHz frequency output practically, which is fine for me.
But Before implementing…
Is there correction point of attached circuit, please let me know.
【Ploblem】
・Customer made attached circuit and external value.
・They hope that clock output is "Duty:40%, 4kHz", but result was "Duty:70%～, 6kHz".
・Is Ra:Open mistake? or is circuit…
Other Parts Discussed in Thread: NE555 , LM2585 , LM2588 , LM5121 , TPS40210 , LM2586 , LM5122 , LM3488 , LM2587 Based on a couple of reference designs and NE555 datasheet, I created a circuitry as below.
I'm thinking to put 100uH for L1 with switching…
Other Parts Discussed in Thread: NE555 I design soft switch for my design my design need 1.5A, I'm using NE555 the problem that I face is when my design draw 100mA the circuit is work correctly but when my design draw 1A the output of NE555 stay high…
Ajith,
Your results that are 20% lower than expected. The reasons are as follows. 1) D1 has a voltage drop that slows the charging rate. 2) The NE555 has a propagation delay (see figure 8 in DS) The easiest fix is trial and error because the math gets…
Other Parts Discussed in Thread: SA555 , LM555 , NE555 , SE555 , NA555 Hi,
I would like to ask you a question about timer device.
What is the difference between LM555, NA555, NE555, SA555 and SE555?
LM555 SOIC-8 0～70 ℃ Tj:150℃
NA555 SOIC-8 -40…
Other Parts Discussed in Thread: NE555 I am operating a NE555 in standard astable operation, nothing fancy. With the circuit running off a power supply set to 15V, the output frequency is 4.84KHz. If I turn the voltage down to 5V, the frequency is 4.25KHz…
