A Short History of Weighing Scales
Four thousand years from stones in a pan to strain gauges: the Indus Valley balance, Brennus and his sword, Salter’s spring scale, and the load cell that replaced all of them.
countinue reading
Checkweighing with Relay Outputs and a Light Tower
Hi, OK and Lo signalled by colour instead of read from a display. Choosing the relay board, wiring the tower to the DB-25, reading the connector diagrams, and setting the limits.
Adding an RS-232 Interface to a Bench Scale
Fitting a TTL to RS-232 board to a Jadever JCE or JWE: board options, DB-9 to DB-25 pin mapping, serial settings, and the fixed-width ASCII string the scale sends.