I have been creating a few projects for a few magician friends of mine. One project was a simple transmitter that once a button was pressed a vibration motor silently vibrated on the receiver unit. Basically a secret coding tool...Very simple stuff here.
I was using the 08m2 mcu with the cheap ASK RF modules and it was fairly simple to make happen. The issue I am running into now is with my future projects and RF modules. My projects have a few requirments that I am not sure how to meet.
1. The transmitter modules need to be low voltage as the circuit will run off a coin cell. 3v or 3.7V. I know the ASK modules can work at low voltage but without the antenna and low voltage my range would probably be dismal.
2. the transmitter modules cannot have a wire antenna as the circuits will be hidden in wallets, cubes, etc that the spectator may actually hold during the trick. (The chip antennas on some transmitters will probably help with this issue).
3. I have though that these would be the answer.... NRF2401 https://www.sparkfun.com/products/152 but... they use up all the damn pins on the 08m2, there is hardly anyone displaying any picaxe code for them in the forum, and they seem pretty complex to get going and what I need to do i pretty simple stuff.
4. I only need about 20-30 feet transmission range.
5. Work with a keychain keyfob (optional)
All the projects are basically just sending a chracter over RF and the receiver buzzind a certain number of times. example... RFID reader hidden in a wallet reads an RFID card put in the wallet and buzzes a number to the receiver to tell you what card was chosen.... An Accelerometer hidden in a multicolored cube transmits a number from 1-6 to the transmitter to tell the magician what side is faceing up...etc.
Any ideas on a small easy to use transmitter that that can meet the above requirements or am I going to have to get started on learning this nrf2401 and use a larger pin MCU?
Thanks!
I was using the 08m2 mcu with the cheap ASK RF modules and it was fairly simple to make happen. The issue I am running into now is with my future projects and RF modules. My projects have a few requirments that I am not sure how to meet.
1. The transmitter modules need to be low voltage as the circuit will run off a coin cell. 3v or 3.7V. I know the ASK modules can work at low voltage but without the antenna and low voltage my range would probably be dismal.
2. the transmitter modules cannot have a wire antenna as the circuits will be hidden in wallets, cubes, etc that the spectator may actually hold during the trick. (The chip antennas on some transmitters will probably help with this issue).
3. I have though that these would be the answer.... NRF2401 https://www.sparkfun.com/products/152 but... they use up all the damn pins on the 08m2, there is hardly anyone displaying any picaxe code for them in the forum, and they seem pretty complex to get going and what I need to do i pretty simple stuff.
4. I only need about 20-30 feet transmission range.
5. Work with a keychain keyfob (optional)
All the projects are basically just sending a chracter over RF and the receiver buzzind a certain number of times. example... RFID reader hidden in a wallet reads an RFID card put in the wallet and buzzes a number to the receiver to tell you what card was chosen.... An Accelerometer hidden in a multicolored cube transmits a number from 1-6 to the transmitter to tell the magician what side is faceing up...etc.
Any ideas on a small easy to use transmitter that that can meet the above requirements or am I going to have to get started on learning this nrf2401 and use a larger pin MCU?
Thanks!
