Update: earlier issue is resolved (single AA battery will power the LCD continuously for years, so no need to rig up a switch solution to power down).
Next issue is whether I can connect a photo interrupter to this counter: post #12 has details.
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Picked up a digital counter with microswitch from ebay (link here). It has PAUSE and RESET buttons, but no obvious way to power off the LCD. Instructions are in Chinese and posted below on the off chance that someone here can read it.
Interestingly, I removed the AA battery and the counter still works. So I assume there must be a flat coin style battery on the front side of the board, though the product description only mentions the single AA battery. Anyone familiar with these inexpensive counters? What does the second set of input leads do? Just for a second micro switch?
Anyway, my questions are:
1. Is there any way to power the counter down to conserve the battery?
2. If no built-in power off, is there an easy way to rig one up?
Next issue is whether I can connect a photo interrupter to this counter: post #12 has details.
--------------------------------------------------------------------------------------
Picked up a digital counter with microswitch from ebay (link here). It has PAUSE and RESET buttons, but no obvious way to power off the LCD. Instructions are in Chinese and posted below on the off chance that someone here can read it.
Interestingly, I removed the AA battery and the counter still works. So I assume there must be a flat coin style battery on the front side of the board, though the product description only mentions the single AA battery. Anyone familiar with these inexpensive counters? What does the second set of input leads do? Just for a second micro switch?
Anyway, my questions are:
1. Is there any way to power the counter down to conserve the battery?
2. If no built-in power off, is there an easy way to rig one up?
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