Homemade block detection for signals

Model Railroader Electronics and DCC
1

Since my mainline is nearly complete and running, I need signals but also block detector occupancy for actuating signals.

Severals block detector are offered but are quiet expensive especialy if you need some.

Did anyone have a plan of a homemade block Thanks a lot.

Marc

2

Here’s a good site to start off with –

http://home.cogeco.ca/~rpaisley4/CircuitIndex.html

3

Here is another place to try. See detector #5 about 1/2 way through. http://www.tslrr.com/detector.htm