simo
- 18
- 0
Can you tell me what is wrong with my timer. I want it to make a relay open and shut periodically. For some reason it's not working.
Troubleshooting My Timer: Why Won't My Relay Open and Shut?
- Thread starter simo
- Start date
-
- Tags
- Relay Timer Troubleshooting
Join the discussion
Ask a follow-up here, or get your own question answered by working scientists, mathematicians and engineers — people, not an autocomplete.
Real named experts · corrections over time · the nuance an AI answer skips
3 replies · 3K views
Engineering news on Phys.org
simo
- 18
- 0
berkeman said:You show your output directly shorted to ground. Is that correct, or a typo?
Nope, that's how I made it.
If I disconnect the output/diode junction from ground, would it sink the current?
Gold Member
- 4,458
- 3,265
If you do the calculation from the numbers you give, the sink current would be about 11ma, so the 555 should be able to sink that.
Similar threads
- Darkmisc
- · Replies 4 ·
- Programming and Computer Science
- Replies
- 4
- DiracPool
- · Replies 15 ·
- Computing and Technology
- Replies
- 15
- GTeclips
- · Replies 1 ·
- Electrical Engineering
- Replies
- 1
- DaveC426913
- · Replies 20 ·
- Mechanical Engineering
- Replies
- 20
- thegreengineer
- · Replies 13 ·
- STEM Career Guidance
- Replies
- 13
- Feenix
- · Replies 2 ·
- Engineering and Comp Sci Homework Help
- Replies
- 2
- Math Amateur
- · Replies 2 ·
- MATLAB, Maple, Mathematica, LaTeX
- Replies
- 2
- Taylor_1989
- · Replies 6 ·
- Programming and Computer Science
- Replies
- 6
- leroyjenkens
- · Replies 2 ·
- Computing and Technology
- Replies
- 2
- dezstir
- · Replies 2 ·
- Mechanical Engineering
- Replies
- 2