All About Circuits

This "On delay timer circuit" look correct?

bigjoncoop

Thread Starter

bigjoncoop

Joined Feb 1, 2019
184
I need a circuit to delay the on time of a relay. Needs to be adjustable by 0.1 seconds...

The website I found the rest of the project I'm working on, gave a circuit to do this but I just want to verify with you guys that it correct etc... (image below)

The one thing I'm unsure about is that it shows using a 4 diode bridge rectifier in order to get the necessary DC voltage for the timer circuit to control the 12v relay coil...

Does the circuit seem correct to you? Also it says to adjust R1 in order to adjust the "On delay"

New Project (3).jpg
 
Last edited:
S

sghioto

Joined Dec 31, 2017
5,120
The bridge rectifier is OK and is normally done this way. For a 12 volt DC output would require a 9 volt AC rms input.
Yes, adjusting R1 will provide the delayed ON time. How much delay and how well it works maybe problematic.
 
You must log in or register to reply here.
Thread starter Similar threads Forum Replies Date
MrsssSu Delay Timer using NE 555 circuit General Electronics Chat 7
K 555 timer delay and flashing circuit Digital Design 25
C Install timer delay in pump circuit Power Electronics 2
S First post . . . . seeking an explanation of how a delay timer circuit functions General Electronics Chat 9
Urmil Modi Pulse Delay Circuit Using 555 Timer Digital Design 7
Similar threads
Delay Timer using NE 555 circuit
555 timer delay and flashing circuit
Install timer delay in pump circuit
First post . . . . seeking an explanation of how a delay timer circuit functions
Pulse Delay Circuit Using 555 Timer

You May Also Like

Top