Tasmag

The exact reason i went to an electronic version, have been using the caravan type but they are bulky which means they are not in my field of view through lack of space. The small one i linked is under $25 and can but out forward if my eye line. There are smaller, i particularly like the concept of the usb charger linked above. Mike

Is there a way to tell the type of sensor, given that it has a 3 minute warm up i suspect an older type.

Thanks Skippy, I like the combination of co and humidity on the one i purchased. I have plenty of temp sensors, but no humidity. I like to know the humidity for the carb icing predictions. Mike

Freizepilot I like that, wish i had seen it sooner actually. Mike

Yep, thats pretty much what I had. Never been one to stop at simple though!

Thinking in what you said earlier about a circuit to initiate the start, what about this as the 5 second pulse to turn on. Remove the battery and it will turn off itself. I could leave the battery in but it makes a racket when it goes flat. Mike AU$4.54 | DC 5V 12V 24V Dual Adjustable Cycle Timer Dual Delay On/Off Switch 0-100 Seconds 0-15 Minutes Timer Control Delay Relay Module https://a.aliexpress.com/_mMbe22a

I have found the multimeter. (As soon as I gave up looking for it!) The switches all switch to ground, but interestingly the red and black wires from the battery to the board are around the wrong way. And it does not turn on if you hold the switch and apply power. Mike

RFguy Thanks for the replies. For the life of me, I cant find my multimeter to check the switch grounding. I will get back to you as soon as I find it. Based on the Circuit board I would say it is switching to ground though. Mike

Long press on the top to turn on or off, short press turns off the screen but keeps the detector running. Right-hand switch in the internal pic as you look at it. The other 3 change °C/F, Voice alarm on/off and Chinese/English voice Mike

It seems like the only calibration is a 3 minute warm-up time, as best I can work out anyway.

Hi there I am hoping someone with better electronic knowledge than me can assist with a modification I would like to make to a CO detector I purchased recently. I have been using a standard Caravan unit adapted to take aircraft power instead of batteries, but I want to change to a smaller unit I have. The problem is that it does not turn on when power is applied to the charging input. (it was a shot in the dark hoping it would) I don't need the battery, would be happy if it turned on when power is applied and off when not. (Possibly even better that way as the sensor might last longer) Any ideas on a simple way to achieve this.

Here are the instructions for the new regulator if that helps Regulator 35A installation PI4A026N Issue 2.pdf

It just depends on which regulator you have, the old ones go the the main bus, the new ones go direct to battery. Mike

The easiest way to achieve this is to use a single core shielded wire, connect the shield to ground at the engine and the wire to the mag. Then switch these two to ground the mag. When engine is running the shield is grounded.

Thanks Glen Yes, that is the servo in use. I'll get some Ferrites and give that a try. Appreciate the thorough reply, especially considering the number of replies you give across the forum for such matters! regards Mike