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The articles discusses an automatic door mechanism circuit that responds to the ambient light conditions by keeping the door open during day time and closed during night. Here the application is used for operating a hen house door. The idea was requested by Mr. Gavin Sweet Technical Specifications I have a project that I am … Read moreHen House Automatic Door Controller Circuit
The article discusses a simple overload cut off circuit for safeguarding heavy mains operated machines such as a lathe machine. The idea was requested by Mr. Howard Dean. Technical Specifications May I first say I have very little knowledge of electronics although I could follow a simple diagram. I operate a small Chinese lathe for … Read moreLathe Machine Over Load Protector Circuit
The post explains a high energy surge suppressor circuit for suppressing high current mains surges in industrial electrical. The Circuit Problem: I’ve been reading a lot of your design ideas and I am extremely impressed with your designs. I don’t have anywhere near your level of expertise, but I can follow directions very well. I … Read moreHigh Power Industrial Mains Surge Suppressor Explored
In this article we comprehensively discuss a relatively accurate electronic heart rate sensor circuit processed by a few discretely wired opamp circuit stages, and subsequently we’ll learn how this can be modified for making a heart rate monitor alarm circuit. Using IR Photodiode Sensors The sensing of the heart pulses is basically done by two … Read moreHeart Rate Monitor Circuit
The post explains a simple PWM controlled automatic turnstile or door circuit featuring an automatic open/close action via a photo-interrupter stage. The idea was requested by Mr. Bruce Clark. Technical Specifications Thank you for a really fantastic service you provide. Would you please be so kind as to help me with a modification of the … Read moreAutomatic PWM Door Open/Close Controller Circuit
The article details a PWM speed controller circuit for a fan air blower system to be used in Biomass cook stoves. The circuit also includes an uninterrupted automatic battery back-up supply with an integrated automatic battery charger circuit for the particular application. The idea was requested by Mr. Tushar and Sivaranjani. Technical Specifications Thanks for … Read morePWM Air Blower Controller Circuit for Biomass Cook Stoves