9
Transmitting PHONE LED (Flash) with certain frequency?view story

http://forum.allaboutcircuits.com – Hello everyone! I have started a project making an electrical security system. (Embedded)

9
apply dc to full wave bridgeview story

http://forum.allaboutcircuits.com – What happens if you apply dc where normally ac is on a full wave bridge rectifier? (Embedded)

9
Lm741/747view story

http://forum.allaboutcircuits.com – Hi all I just need some help on my project. what it will take to make a circuit that indicates by turning an led on. when a particular Ac signal is applied. For eg. (Embedded)

9
negative resistance with conveyor currentview story

http://forum.allaboutcircuits.com – Hello everyone, I'm working on a project on current conveyors and I want to test the operation of the latter in negative resistance. My question is that I have to attack the Y input conveyor with a current generator and a voltage generator? (Embedded)

9
Using a PIC to program keypad?view story

http://forum.allaboutcircuits.com – Hello, I was learning PIC BASIC language along with assembly, then I came up to a project which requires inputs of external keypad and the aim is to change the state of a particular port when 4 subsequent inputs of the keypad matches with the programmed. In short, a lock system with 4 number password. (Embedded)

9
reversing dc motor with ne555view story

http://forum.allaboutcircuits.com – Hello. Please help. I need circuit for this. astable ne555 circuit for starting motor 12v dc. Motor start and run forward about 30 sec, than stop about 5 sec and then start reverse about 10 sec, again stop 5 sec and start forward 30 sec ....... continous This is dc motor reversing circuit with pause between forward and back Thanks advance (Embedded)

9
Electric Gate Problem - Probably a simple fix.. just don't know what I need.view story

http://forum.allaboutcircuits.com – Okay here goes explaining this. I have a 110v electric gate opener at my shop (very similar to a garage door opener with a longer throw) This has never worked and the last couple days I spent a little time trying to get it going. (Embedded)

9
CurrentLoad Questionview story

http://forum.allaboutcircuits.com – I have been wanting to build a Adjustable Constant Current Load project and I have a couple questions ... The schematic is listed below and do you guys see any problems or anything can be upgraded or should ??? My idea was to change the mechanical switch to a soft latching power switch ... Then I will be using dual display instead of using the single display and a switch... (Embedded)

9
Moderator locks own threadview story

http://forum.allaboutcircuits.com – There's a first time for everything...or maybe this has happened before? :) http://forum.allaboutcircuits.com/sh...ad.php?t=90418 (Embedded)

9
Implementing a boolean function using a single 8:3 decoder and a single nand gateview story

http://forum.allaboutcircuits.com – ok so I am asked to implement the following boolean function: F(w,x,y) with these minterms (0,2,3,5). I am allowed to use a single decoder(74138) and a single nand gate. I found the solution using De Morgan's laws of logic but it seems like I need inverters for the minterms 0,2,3,5. Please help me... thank you... (Embedded)

9
RLC Circuit Currentview story

http://forum.allaboutcircuits.com – Hi all, I need help with the first question from this problem sheet I am doing. Of course I am not asking anyone to just post the answer, but some guidance in the right direction would be appreciated. That way I can attempt it, and post my answer for scrutinizing ... Question: Thank you. :) (Embedded)

9
homework help pls xDview story

http://forum.allaboutcircuits.com – a. Why does external voltage increased with decreasing current with seperate excitation? b. Why does external voltage decrease more with shunt than with seperate excitation? (Embedded)