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Hi Le Gui. The new pcb - version 0.7 is only available etched and pre assembled with a lot of SMD components from Edwin's website, Teensybat.com, and comes complete with a microphone. The new pcb is the only one to support Teesny 4.1. Its showing as out of stock but drop Edwin a line and see...

Tried out the latest version Hi. Downloaded the second version of 095 as tried by Edwin. Its working well on my transistor amplifier model. The revised menu layout is a big improvement, gets a lot of material irelevant to using the device in the field out of the way. Its simpler to use by far...

Hi Is it possible include an option to reverse the direction of the encoders? I have two teensybats with encoders that work in opposite directions - very confusing. I know you posted v0.90 in two versions with opposite direction encoders but later hex files have all been one direction only. It...

THanks Edwin, yes that helps. Regards Barry

Query regarding resistors in documents for build 0.2a Hi Edwin Can you clarify where the 100 ohm resistor bodies go between teensy and audio board please. Do the main resistor bodies go between the teensy and the audio board or under the audio board and the main pcb with just a wire link...

Hi The build with resistors in data lines looks intriguing. The noise improvement is definite. I am collecting components for a second op amp based build to compare it with my original 1 transistor model so I think I will try that. Very little extra work for what looks like a worthwhile gain.

Hi Thanks for that. I am not any sort of expert on analogue electronics so impedance matching is something I don't know anything about. I obviously misunderstood that you can improve impedance matching by simply changing a resistor. I have used a machined nylon bolt as the microphone input and I...

How to reduce the 23KHz noise peak Hi I have built and am using the 1 transistor amplifier version and running 0.92 with no problems so far. I note that you can get rid of the annoying 23Khz noise peak by altering a resistor to match the microphone impedance more accurately. As far as I know I...

HI. Many thanks for posting the short manual. I have been thinking that a manual is a good idea, TeensyBat is getting a bit complicated to carry it all in your head, especially when, like me, your the wrong side of 70. I am retired but used to be an IT teacher trainer and wrote many manuals to...

Photo of my build Hi AS requested a photo of my build. I use an external PSU, easy to change if it runs out, less electrical noise in the case. Case was one I had spare from a previous project.

Hi. Well I use it for one. I am running software v0.88 and recording to a Sandisk 2Gb microSD. Its performing very well, sensitivity is good and the regular development is a big plus. We have Long Eared bats, Pipestrelle bats and occasional Noctule Bats in the area I survey. Thanks Corbee, Edwin...

Bat recordings Hi Lovely warm evening. Constant Long Eared bat activity. v0.86 recorded 6 sessions of about 2-3 minutes each on SanDisk 2Gb microsd which played back on PC via Audacity 2.3.2. Spectrogram on Audacity was good enough to identify a pipistrelle in the background that was masked by...

Detailed report Hi Sorry, Long eared, pipistrelle and noctule last night, earlier nights too cold or too windy. UNit not completely boxed but very field usable. A bit of a triumph!! Thanks again

Hi. Firstly a big thank you to those that helped me - pe1pwf, Corbee, Remis and DD4WM. I built the detector from Edwin's excellent PCB and guide. I had problems compiling the software and, after a struggle, gave up and used Edwin's suggestion to burn the hex file direct using teensy.exe. It...

Hi. Thank you. I have downloaded all the modified libraries listed in Edwin's document. I will search for Corbees last posted code and download all your posts and study them. also your mod to stdio.c. Long night ahead!! Many many thanks again.

Hi. I am a complete newbie to this forum and to Teensy. I am OK with electronics and have several years experience with Arduino. I am building the Teensy 3.6 Bat detector V0.1 20180814 having bought the PCB and microphone via Ebay. I am attempting to compile the code published in Post #159 of...