1 gram transmitter prototype

1 gram transmitter prototype

This was a wildlife tracking transmitter, used for tracking bats, operating at around 150MHz.
The prototypes were hand made by placing Kapton tape upside down over a printout of a PCB layout. The parts were put on top of the sticky side of the tape. The 30AWG solid wire was used to make connections. When all the parts and wires were in place, I put dabs of solder paste over all connections. At the end I reflowed the solder with the use of hot air tool. A number of prototypes were successful with this method.
With the help of a PCB house the final double sided PCB was made on the thin somewhat flexible substrate used inside multilayer PCBs.
With battery and crystal the transmitter weight just 1 gram with a lifespan of about 1 month.

Complete 1 gram wildlife tracking transmitter board

Complete 1 gram wildlife tracking transmitter board

2 Comments

  1. wanted to get the layout of the PCB board mount power to the circuit and test in identifying shelters for bats on amazon, am biologist and am trying to develop a tracker for two years, I have studied a bit of electronic components with smt bad because it is very difficult I have the knowledge to make the organization of components and also have no condition to buy. thanks for listening. also wanted to ask what use to track the radio transmitter. thank you

    • Thank you for your inquiry. I am not able to give out the schematic for the 1 gram transmitter since that was a project for one of my clients however I can tell you the disadvantages of that design. That transmitter required custom crystal, each transmitter was build with a crystal of different frequency so this brought up the cost and weight of those transmitters quiet a bit.
      I will email you some options on how I would proceed today.