OK. So I found the board schematic of the Telemetrum and gave it a quick study. I think I understand the wiring and it is simpler than I thought. The way it was worded in the manual made me believe I had to loop the power through the switch, instead of just connect it across pins 1 and 2. After reading he manual for the third time and seeing the board schematic and the fact one connects the Lipo directly to the JST connector was the tip-off that I was misinterpreting the description.
So the only times that one would connect directly to a battery and not through the JST connector are: 1 - Using an active switch circuit, where the switch board requires power 2 - Using a separate pyro battery(ies), where you ground through the board, but supply positive power to the igniters via a switch and pyro battery. Correct? Scott Myers AC8DE From: altusmetrum [mailto:[email protected]] On Behalf Of Scott Myers Sent: Sunday, May 21, 2017 2:52 PM To: [email protected] Subject: [altusmetrum] Block Connection Schematics I can't seem to find a block wiring diagram in the for any of the flight computers. There's verbose descriptions of the screw terminals, but even those leave me guessing a bit. There are also other connectors on some boards that I do not know what they are for. For instance, the Telemetrum wiring chart says: 1 Switch Output Switch connection to flight computer 2 Switch Input Switch connection to positive battery terminal 3 Main + Main pyro channel common connection to battery 4 Main - Main pyro channel connection to pyro circuit 5 Apogee + Apogee pyro channel common connection to battery 6 Apogee - Apogee pyro channel connection to pyro circuit So here is where my confusion comes in. For instance: Pins 1 & 2 appear to be the pins you connect the switch on the airframe across. However, pin 2 mentions connection to positive battery terminal. Does that mean that pin 2 makes a connection to the battery internally or does it mean I need to loop the switch circuit through the battery? IF it is internal, where does the battery connect? Does it connect at the little white Molex header? The same sort of confusion comes in on the pyro channels. A simple block diagram would solve all my confusion. Can anyone provide me typical wiring block schematics? What are the little red headers for on the Telemetrum? Thanks, Scott Myers AC8DE
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