New
Found the same burnt out chip on both boards .
4054, Standalone Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT

spike

Hi have been given a couple of Akura Retro Phono n BT Players and of course they don't work, where do I start to test voltages etc on it, getting 5vdc out of transformer and to the board, the battery is giving out 3.7vdc , don't realy know where to test for any voltages , tried to find a schematic e...

Schematic is by " dodgydave"

Hi
Have done a revised schematic as attached ! , to give me 2 sec delay.

cheers
Spike

Would this do .

cheers
Spike

Hi Am wanting to make a "IR BEAM BREAK SENSOR" as per attached schematic! . Also I would like to add some sort of “Time Delay” to the schematic , so when the beam breaks, and the relay gets activated , would like the relay to stay activated for a couple of seconds after the object has pass...

Hi I have a Paper Shredder that ir sensor is not working, changed Caps still no luck, so have given up on that part, the Shredder itself has hardly had much use, the motor works fine ( in reverse ) . What I am wanting to do is make a small ir proximity paper detector to operate the 24v relay on the ...

Hi I am attaching a drawing for a flickering LED solar charged , I am wanting to change the supply voltage to 2.4v ( from 2 x 1.2v Ni-MH ) and using 2 x solar panels from the pound shop ( giving out 5.6v ! ) , driving a flickering LED 1.8v to 2.2v . What would I have to change to obtain my result ! ...

Hi

Is there a problem with attaching a file like a drawing etc that is in a .pdf doc format ! , most of my schematics are that format .

cheers

spike

Hi I am wanting to a make a Firefly Jar , I found the project on american site , I just wanted to know if anyone on here can help me with making it and sourcing the items info as follows . This is the info from the web site , I will attach a drawing ! : DESCRIPTION: I'm calling it the Firefly Jar si...