Hi Welcome to EasyEDA. Please refer to: `Hide the simulation button` in: https://easyeda.com/Doc/Tutorial/new-v-3.10.htm To get up to speed using simulation in EasyEDA, please also see: https://docs.google.com/document/u/1/d/1OWZVVFRAe_2NW3WratpkA_SGuHa5AcRow5ZRfvcoVTU/pub

@andyfierman Now how i can simulate? it always says a voltage must have the probe How i can find it?

Hi Gilbert, As you'll no doubt have lots more questions about simulation we **strongly** recommend that you read the EasyEDA Simulation eBook and play with the examples given in it. https://docs.google.com/document/u/1/d/1OWZVVFRAe_2NW3WratpkA_SGuHa5AcRow5ZRfvcoVTU/pub In particular you will find the answer to your question about probes here: https://docs.google.com/document/u/1/d/1OWZVVFRAe_2NW3WratpkA_SGuHa5AcRow5ZRfvcoVTU/pub#h.z337ya https://easyeda.com/editor#id=4a1e559f288a4538b7d53a504a98bd3f Please note that if this is the circuit that you are trying to simulate: https://easyeda.com/editor#id=c59e766a80534cc9a7e053076aef08cd then there are some problems with it. 1. Although Q1 emitter is connected to ground, ground is not connected to battery negative: there is no join dot where the wires cross. 2. You have no input signal source. Simply drawing an antenna does not invoke a suitable signal source in the simulation. 3. Q2 base and collector are shorted together so Q2 simply clamps Q1 collector to one diode drop above ground. 4. The left hand end of C1 is floating. This will throw an error. All nets in a simulation must have a DC path to ground either through an existing component, power or ground connection or through a dummy high value resistor. 5. L1 looks too high to do anything in a VHF circuit. 6. The speaker R2 is only 8 Ohms. In practice this effectively shorts the collector of Q1 to ground. Such a circuit cannot drive such a low impedance DC coupled load: it would normally drive an amplifer of some sort or possibly high impedance headphones. 7. S1 is open circuit. 8. If this is meant to be a super-regenerative FM receiver then although such receivers self-oscillate, to avoid having to wait ages for it to start up, you will probably have to kick it into oscillation. Solutions to issues 2, 4, 7 and 8 are explained in the simulation eBook: https://docs.google.com/document/u/1/d/1OWZVVFRAe_2NW3WratpkA_SGuHa5AcRow5ZRfvcoVTU/pub#h.3rdcrjn https://docs.google.com/document/u/1/d/1OWZVVFRAe_2NW3WratpkA_SGuHa5AcRow5ZRfvcoVTU/pub#h.26in1rg https://docs.google.com/document/u/1/d/1OWZVVFRAe_2NW3WratpkA_SGuHa5AcRow5ZRfvcoVTU/pub#h.lnxbz9 https://docs.google.com/document/u/1/d/1OWZVVFRAe_2NW3WratpkA_SGuHa5AcRow5ZRfvcoVTU/pub#h.46r0co2