Timeline for Why is the Relay "Chattering"?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 23 at 23:41 | comment | added | Hazardous Voltage | The mechanism works like this: input voltage comes from the mains rectified using D3 and gets divided by (R3,R15 and R4) and smoothed through C2 then enters to the Under and Over voltage comparators measuring in reference to the zener diodes D4 and D5 if it is in between region of 4.7 V and 6.8 V then the circuit will go through a 3 min Delay after that it turns on if it stayed in that region. if it went higher than 6.8 V or lower than 4.7 V, then the Red LED will turn ON | |
| Jun 23 at 23:37 | comment | added | Hazardous Voltage | I included it now, since it is necessary. It is measured as under voltage at D4 and over voltage at D5 using two comparators. | |
| Jun 23 at 23:35 | comment | added | Spehro 'speff' Pefhany | I don't actually see where the measured voltage is compared - maybe you elided it. | |
| Jun 23 at 23:30 | comment | added | Hazardous Voltage | I tried using a transistor to drive the relay directly from pin 8 of the op-amp, connected the collector to the ground pin of the relay (I removed the ground and put the collector pin instead) but it resulted in tripping the green led even before reaching the under voltage | |
| Jun 23 at 23:24 | comment | added | Hazardous Voltage | Can you please guide me where should the hysteresis be applied, should I increase R10? | |
| Jun 23 at 23:22 | history | answered | Spehro 'speff' Pefhany | CC BY-SA 4.0 |