You are viewing a single comment's thread from:RE: Warning system door open alarm circuit | uses 555 timer and LDR.View the full contextsteemcurator07 (55)steemcurator07in Steem For Bangladesh • last month SPOT-LIGHT TEAM: Your post has been voted on from the steemcurator07 account. Thank you for your valuable efforts! Keep posting high-quality content for a chance to receive more support from our curation team.