Organize and Share your Electronics the way you want. Sign-Up for a free account now. It takes only 30 seconds!

Grade Crossing Bell Ringer

Grade Crossing Bell Ringer

This is an updated version of an LM555 timer based – Grade Crossing Bell Ringer – circuit that was built for the London Model Railroad Group.
SOUND – The sound is reasonably loud and mechanical sounding, similar to actual crossing bells.

CIRCUIT MODIFICATIONS – The value of R1 may be lowered and the value C1 increased to give a more powerful coil current if a louder ring is desired.

BELL MODIFICATIONS – The circuit-breaking contacts of the bell’s solenoid are not used and have been bypassed by connecting the blue wire directly to the coil. The armature has been bent so that less throw is needed for it to strike the gong.

Visit Here for more.

 

More Articles to Read

Free PCB Sunday: Pick your PCB
Free PCB Sunday: Pick your PCB
App note: Testing inductors at application frequencies
App note: Testing inductors at application frequencies
App note: Working voltage ratings applied to inductors
App note: Working voltage ratings applied to inductors
1968 Princeton Reverb Repairs
1968 Princeton Reverb Repairs
Skill Sunday: Power Over Ethernet for Arduino
Skill Sunday: Power Over Ethernet for Arduino
More on Color TFT Displays ~ The Big Ones — 240 X 320
More on Color TFT Displays ~ The Big Ones — 240 X 320
Magnetic Rotary Encoder
Magnetic Rotary Encoder
Vertical Pole Climbing Robot
Vertical Pole Climbing Robot
ESP8266 Weather Station Projects
ESP8266 Weather Station Projects
Single tube Lethal Nixie clock
Single tube Lethal Nixie clock

Top




Shares