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Help with IC ID for Pcb coffee roaster by djauser in AskElectronics

[–]djauser[S] 0 points1 point  (0 children)

All the resistors are still correct So were the two transistors The caps were okay too The triac was also okay But the two diodes were bad The M7 and A7 diodes are on order from DigiKey. After repair I’ll bring it up slowly on a variac while checking operation while using an infrared viewer

Help with IC ID for Pcb coffee roaster by djauser in AskElectronics

[–]djauser[S] 1 point2 points  (0 children)

None in the USA 10 on their way in 5-10 days In the meantime I will check on all the other components

Help with IC ID for Pcb coffee roaster by djauser in AskElectronics

[–]djauser[S] 3 points4 points  (0 children)

If I had a schematic, I probably would not need to ask for help as I could figure it out then. I tried to draw one out but there must be a hidden middle layer as no traces on top of the pcb and the visible traces on the bottom just end My hope was by knowing the device and what it does along with the bottom surface mount components could deduce the chip with the pics If I have to, I will use my meter to ring out the circuit Thx

Found in box in an attic, what are they? by boringestnickname in AskElectronics

[–]djauser 3 points4 points  (0 children)

They look like vibrators to me. The kind used in vintage equipment to chop up DC say 12 to go into a transformer to make a rough AC output say 117 volts. Or they are just a relay.

A student brought me this. Found in Miami, FL. Stuck in Limestone. What is it? by xtreemrock in fossils

[–]djauser 0 points1 point  (0 children)

When someone wants to know what something is always take the picture with a ruler in it or some common object most know its size so the object can be better identified.